Roseanne Denise Diab
Obituary
Roseanne was born to Dennis and Marjorie Traynor and grew up in Durban North, then a rapidly developing suburb home to many returning World War II veterans. She shared a happy childhood with her younger sister Beverley (Bexie) and her close friend and neighbour Lynne. Their days were filled with endless Monopoly games, ballet concerts, and climbing a favourite tree where Roseanne imagined herself captain of a great ship sailing the world. As a teenager, she spent long hours studying in her bedroom, calling out to her mother for snacks, which were reliably and swiftly delivered.
After matriculating from Northlands Girls’ High School in 1966, Roseanne completed a BSc at the University of Natal, followed by her University Education Diploma in 1970. She worked back the terms of her bursary with the Natal Education Department as a teacher at Northlands Boys’ High School, instructing overzealous teenage boys barely younger than herself. Richard, also a teacher at the school, recalls having to intervene to restore order. The matric boys, it seemed, struggled to focus on mathematics when taught by a strikingly beautiful redhead so close to their own age.
In 1973, Roseanne returned to the University of Natal to complete her first postgraduate degree, graduating with first-class honours in Geography. This department would become her academic home for the next 36 years. Over that time, she rose to the rank of full professor, served as Head of Department and Head of School, sat on the Senior Promotions Committee and University Senate, and was ultimately conferred Emeritus Professor status. Her office—still reserved for her exclusive use—remains filled with thousands of books and papers, testament to a lifetime of scholarship. These years were marked by deep collegial friendships and were among the happiest of her life.
After a year-long long-distance relationship while Richard taught in Grahamstown, the couple married at Maris Stella Convent in Durban on 15 December 1974. They began married life in a small bachelor flat in the Durban CBD, sharing a single car that Richard moved daily before 7am due to street parking restrictions. Paula was born in August 1976, the same year Roseanne completed her Master’s degree in Geography. This period marked the emergence of one of Roseanne’s defining strengths: her extraordinary ability to build an exceptional career while remaining fully present for her family.
That balance was even more evident when she earned her PhD from the University of Virginia in 1983. During this time, Michelle was born in 1981, and Michael was born in New York City while Roseanne was travelling to defend her doctoral thesis in 1983. Few could match her capacity to integrate intellectual rigour, professional ambition, and deep maternal devotion.
In the years that followed, Roseanne miraculously navigated swimming practices for three different children at three different schools while achieving promotion to full professor in 1991. She attended every hockey, netball, and rugby match while publishing over 100 peer-reviewed journal articles, authoring or editing 11 books, and serving on the Editorial Advisory Board of the South African Geographical Journal. She also sat on the Durban City Council Environment Committee and Air Pollution Sub-Committee, where her research on pollution from oil refineries in South Durban brought her into direct conflict with powerful industrial lobbyists. Her children delighted in seeing their usually camera-shy mother interviewed on national television—an experience repeated several times during her career.
Family holidays were often undertaken in an un-airconditioned red-and-white Toyota Kombi and planned around research trips to rural weather stations. During this time, Roseanne pioneered the introduction of renewable wind energy to South Africa, with a particular focus on electrifying rural schools beyond the reach of the national grid. Richard served as a cost-effective (free) research assistant, repairing weather station equipment with McGyver-like ingenuity and replacing countless burst tyres on remote roads. Meanwhile, Roseanne sang to her children and invented games to keep them calm and happy in the heat.
The Diab family home became a hub of hospitality, hosting Christmas gatherings for Richard’s large family alongside visiting professors from across the world, including Russia, Lebanon, Sweden, Canada, South Sudan, Argentina, and the United States. It was also a place of refuge. During periods of township unrest, the son of the departmental cleaning lady lived with the family in defiance of apartheid laws. Decades later, Roseanne was moved to tears when a successful South African businessman approached her in an airport lounge and said, “Mom, do you remember me? I am Sihle.”
Roseanne championed each of her children’s education in deeply personal ways. Paula learned to read before starting school and transitioned successfully between kindergartens in the United States and South Africa. Roseanne advocated fiercely for Michelle’s admission to Durban Girls’ College and personally tutored Michael for two to three hours every day. All this occurred while she supervised and graduated more than 50 Master’s and PhD students, many of whom went on to shape South African and global science.
Her international scientific career took flight in the early 1990s when she pioneered ozone research, identifying the relationship between atmospheric conditions and ozone concentration. She identified ozone maxima and demonstrated the role of biomass burning as a causal factor. This work brought NASA scientists to the family dinner table and introduced terms such as “thermo-topographically induced winds,” “atmospheric transport,” and “photochemistry” into everyday conversation. She went on to serve on National Research Foundation assessment and appeals committees and the CSIR Wind Energy Initiative.
As early as 1990, Roseanne published on ozone as a greenhouse gas. By 1997, she convened the joint IAMAS–IAPSO assembly in Melbourne as the world began grappling seriously with climate change. Her leadership of global climate science was acknowledged when she was appointed to co-chair the Intergovernmental Panel on Climate Change (IPCC) review committee. This is the scientific body the world looks to when seeking guidance on climate change and which is subject to the misinformation attacks of those with vested interests. Her scientific rigor and exceptional integrity protected her from the generously funded (over USD 2 billion) lobbying campaigns that sought, unsuccessfully, to discredit her work and that of her colleagues.
Despite global recognition, Roseanne remained profoundly grounded. She could return from travel on a diplomatic passport and be found chopping tomatoes in her sisters-in-law’s kitchen at Christmas, more interested in their children and lives than her own achievements.
Roseanne conducted numerous environmental impact assessments in sensitive areas such as Kosi Bay, where family trips coincided with privileged access to turtle nesting sites. She later served on the Standards Generation Task Team for EIA Practice, exemplifying her characteristic approach: pioneering research followed by codification to enable others. Collaboration and service to humanity—not personal recognition—drove her work. She travelled economy class, lived modestly, and famously never used an ATM. Richard ensured her purse always contained sufficient petty cash.
Over her career, Roseanne published 25 formal research reports and presented at 118 international conferences across all seven continents. Roseanne’s passion for exploring afforded her children incredible opportunities as they grew up accompanying her on trips where, for example, she sandwiched Disneyland with meetings at NASA and, on another occasion, a European girls-and-grandchildren road trip with Nobel Laureate young scientist awards. She was adept at creating worksheets for her children to self-supervise museum visits whilst she presented at conferences or held meetings with scientific peers. All three of her grandchildren have had the opportunity to travel with her and experience the world has her backyard. She met multiple heads of state and treated every guest in her home as a dignitary.
Roseanne “retired” many times, but global need repeatedly drew her back. Upon compulsory retirement from the University of KwaZulu-Natal, she was appointed Executive Officer of the Academy of Science South Africa, serving two terms from 2008 to 2018. During this period, she secured long-term funding through parliamentary advocacy, renewed Academy publications, and helped establish the Academies of Mozambique and Namibia. She balanced international leadership with supporting Paula’s PhD fieldwork as her unpaid research assistant.
In 2019, she became special advisor to the UN’s GenderInSITE initiative, championing women in science and dismantling systemic barriers she herself had faced and overcome. This coincided with mentoring Michelle through significant personal and professional transitions, including study at MIT in Boston.
Her later career shifted toward science policy and executive leadership. Though her personal publication rate slowed, her influence expanded through over 50 committees, including TWAS, the African Union Panel on Emerging Technologies, the OECD Expert Group on Science Advice in Emergencies, and SACNSP. She chaired her final meeting on 20 November 2025 while undergoing cancer treatment. When asked why she continued, she said simply, “My contribution is needed.”
Roseanne attended every ballet concert, piano recital, and award ceremony of her children and grandchildren—often missing her own awards ceremonies. Her honours were many: Fulbright Scholar, Ernest Oppenheimer Fellow, Rockefeller Foundation Fellow, and Fellow of numerous national and international academies.
Her love for her family knew no bounds. She travelled to the United States to bring Michael home from military deployment and accompanied five-year-old Bella on frequent long-haul flights so she could be with her mother. Her legacy lives on in her grandchildren: Brunton’s leadership and intellect, Lauren’s service and tenacity, and Bella’s resilience and joy.
The world has lost a prolific scientist, gifted teacher, and exceptional leader. Our family has lost its matriarch. Friends have lost their Rose. Most especially, Richard has lost the partner to whom he devoted his life. For 52 years, he enabled and amplified Roseanne’s greatness—as her confidant, champion, financial-manager, steadfast love and, in the last months of her life as an exceptional caregiver.
Requiem Mass
Wednesday, 14 January 2026 at 11am
Our Lady of Mercy Catholic Church
79 Old Main Road, Kloof
In lieu of flowers, Richard has requested donations to the Our Lady of Mercy Church Building Fund or the Saint Vincent de Paul Society. Paula, Michelle and Michael request visits to Richard after his immediate family departs at the end of January.
The service will be live streamed for those unable to attend in person at https://youtu.be/ipNL_xfy7ds
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January 12, 2026
MINISTER NZIMANDE’S STATEMENT ON THE PASSING OF PROFESSOR ROSEANNE DIAB
TO: ALL MEDIA
DATE: 12 JANUARY 2026
The Minister of Science, Technology and Innovation, Prof. Blade Nzimande is deeply saddened by the news of the passing of Professor Roseanne Diab.
She was one of South Africa’s most distinguished scientists and served our country in a number of capacities.
Through her long service at the Academy of Sciences of South Africa (ASSAf) and other national scientific and academic bodies, she contributed to enhancing the quality of our country’s research and thereby strengthening South Africa’s science, technology, and innovation policy.
She was also a strong advocate for gender equality in science, technology, engineering, and mathematics (STEM) and because of this, she served as Director of GenderInSite and chaired the Gender Advisory Committee of The World Academy of Sciences (TWAS).
She contributed to science policy formulation in such areas as emerging and transformative technologies, environmental sustainability, and equity in higher education and is also widely recognised for her pioneering research in air quality, atmospheric pollution, and climate change.
Professor Diab’s passing constitutes an incalculable loss for our South Africa’s scientific and academic communities.
We will remember her as a committed scientist, scholar, academic and mentor, whose work greatly enhanced our country’s standing as an emerging and global leader in several important scientific fields.
On behalf of the Department of Science, Technology, and Innovation and all the Entities in our National System of Innovation, I wish to convey my heartfelt condolences to the family, friends, and colleagues of Prof Diab.
Enquiries: Veli Mbele (Media Liaison Officer and Spokesperson to the Minister) 064 615 0644 or Veli.Mbele@dsti.gov.za
ISSUED BY THE MINISTRY OF SCIENCE, TECHNOLOGY, AND INNOVATION
TO: ALL MEDIA
DATE: 12 JANUARY 2026
The Minister of Science, Technology and Innovation, Prof. Blade Nzimande is deeply saddened by the news of the passing of Professor Roseanne Diab.
She was one of South Africa’s most distinguished scientists and served our country in a number of capacities.
Through her long service at the Academy of Sciences of South Africa (ASSAf) and other national scientific and academic bodies, she contributed to enhancing the quality of our country’s research and thereby strengthening South Africa’s science, technology, and innovation policy.
She was also a strong advocate for gender equality in science, technology, engineering, and mathematics (STEM) and because of this, she served as Director of GenderInSite and chaired the Gender Advisory Committee of The World Academy of Sciences (TWAS).
She contributed to science policy formulation in such areas as emerging and transformative technologies, environmental sustainability, and equity in higher education and is also widely recognised for her pioneering research in air quality, atmospheric pollution, and climate change.
Professor Diab’s passing constitutes an incalculable loss for our South Africa’s scientific and academic communities.
We will remember her as a committed scientist, scholar, academic and mentor, whose work greatly enhanced our country’s standing as an emerging and global leader in several important scientific fields.
On behalf of the Department of Science, Technology, and Innovation and all the Entities in our National System of Innovation, I wish to convey my heartfelt condolences to the family, friends, and colleagues of Prof Diab.
Enquiries: Veli Mbele (Media Liaison Officer and Spokesperson to the Minister) 064 615 0644 or Veli.Mbele@dsti.gov.za
ISSUED BY THE MINISTRY OF SCIENCE, TECHNOLOGY, AND INNOVATION
January 30, 2026
Dear Richard, I was very sorry indeed to read of Roseanne's passing.
My heartfelt condolences go out to you and your family. From what I have read, her illness was diagnosed a relatively short time before she succumbed to it.
Roseanne was a lovely human being and I am sure she will be dearly missed.
I remember you very well as one of our Physics students.
Subsequently, on the U of N Research Committee, I met up with Roseanne as a very promising young researcher, and was impressed by her.
In due course, I was able to interact with her a lot during my years on the ASSAf Council.
Unfortunately, after I withdrew from ASSAf activities, we lost contact.
A few days ago, I thought of her again and wondered whether she/you were still in KZN or had moved to Gauteng (I remember that she had done a lot of commuting) or maybe even overseas, because of her international activities and sought out her old contact details.
I regret that I didn't try to reach her.
I think that the last time that I saw her/you could have been at her 60th (?) birthday party at your beautiful home, although we did chat with or email each other after that.
In particular, I recall talking to her on her retirement from ASSAf, when she went on to take on a leading role in international science.
I will always remember her as an excellent scientist, an outstanding, caring and very hard-working manager- administrator at ASSAf, and a lovely lady, a great human being.
At the same time, I would like to thank you for your great supportive role in her career.
I know how much my wife, Karin, contributed to my career, and I saw how much your support enabled her.
Unfortunately, life is finite, and I lost Karin in March 2023 to an aggressive breast cancer, soon after we had moved to Woodgrove Retirement Village in PMBurg.
Although I miss her, I am grateful and feel blessed for the years that we could share.
Although I will not be able to attend the funeral in person, I am glad to have obtained from the church the link for the live-streaming of the service and I will share in it with you.
Hamba kahle, Roseanne, and may God give you, Richard, and your family strength in this difficult time.
Best wishes from Manfred Hellberg
My heartfelt condolences go out to you and your family. From what I have read, her illness was diagnosed a relatively short time before she succumbed to it.
Roseanne was a lovely human being and I am sure she will be dearly missed.
I remember you very well as one of our Physics students.
Subsequently, on the U of N Research Committee, I met up with Roseanne as a very promising young researcher, and was impressed by her.
In due course, I was able to interact with her a lot during my years on the ASSAf Council.
Unfortunately, after I withdrew from ASSAf activities, we lost contact.
A few days ago, I thought of her again and wondered whether she/you were still in KZN or had moved to Gauteng (I remember that she had done a lot of commuting) or maybe even overseas, because of her international activities and sought out her old contact details.
I regret that I didn't try to reach her.
I think that the last time that I saw her/you could have been at her 60th (?) birthday party at your beautiful home, although we did chat with or email each other after that.
In particular, I recall talking to her on her retirement from ASSAf, when she went on to take on a leading role in international science.
I will always remember her as an excellent scientist, an outstanding, caring and very hard-working manager- administrator at ASSAf, and a lovely lady, a great human being.
At the same time, I would like to thank you for your great supportive role in her career.
I know how much my wife, Karin, contributed to my career, and I saw how much your support enabled her.
Unfortunately, life is finite, and I lost Karin in March 2023 to an aggressive breast cancer, soon after we had moved to Woodgrove Retirement Village in PMBurg.
Although I miss her, I am grateful and feel blessed for the years that we could share.
Although I will not be able to attend the funeral in person, I am glad to have obtained from the church the link for the live-streaming of the service and I will share in it with you.
Hamba kahle, Roseanne, and may God give you, Richard, and your family strength in this difficult time.
Best wishes from Manfred Hellberg
January 30, 2026
Obituary: Professor Roseanne Denise Diab
11 November 1949 – 10 January 2026
It is with deep sadness that we share the news of the death of TWAS Fellow Prof. Roseanne Diab.
Prof. Diab, was a distinguished South African researcher and global science leader whose career left an enduring impact on atmospheric science, science policy, and global efforts to advance gender equity in science, innovation, technology and engineering. She served as director of Gender in Science, Innovation, Technology and Engineering (GenderInSITE), an initiative hosted by TWAS’s partner OWSD, and previously as chief executive officer of the Academy of Science of South Africa (ASSAf).
An internationally respected atmospheric scientist, Prof. Diab made significant scholarly contributions to the fields of air quality, climate change, atmospheric dispersion modelling, and tropospheric ozone research. Her academic career at the University of KwaZulu-Natal, where she later held emeritus professor status, was marked by scientific rigour, intellectual curiosity, and a deep commitment to postgraduate training and mentorship.
Beyond her scientific achievements, Prof. Diab was an active Fellow of TWAS and the ASSAf. As a member of the TWAS Gender Advisory Committee, she contributed to an insightful and granular analysis of the root cause of gender divides by scientific discipline to unravel systemic gender gaps that was exemplary of her commitment and attention to detail in whatever she undertook. Her thoughtful analyses and dedication to equality in science were invaluable. Her proposal to accelerate progress to closing the gender gap in TWAS through dedicated years of female only Fellows was adopted at the recent TWAS General Conference in Rio de Janiero, Brazil. Unfortunately, her failing health precluded her participation in Rio. Notwithstanding, she was delighted to learn about the TWAS strategy which is expected to achieve gender parity in membership elections by 2032 through a balanced yet ambitious approach. In particular, the plan to dedicate every third fellowship election cycle exclusively to women represents a significant intervention, one that will substantially accelerate progress and dramatically shift the trajectory toward gender balance.
My interactions with her during her tenure as executive officer of the Academy of Science of South Africa, exposed me to the pivotal role she played in strengthening the Academy’s voice in science advice and evidence-informed policymaking. Her leadership as vice-president helped consolidate ASSAf’s national relevance and international standing, and was characterised by integrity, inclusivity, and a firm belief in science as a public good.
In her role as director of GenderInSITE, Prof. Diab became a globally recognised advocate for gender equality in science systems. She led initiatives that addressed the structural and systemic barriers faced by women and girls in STEM, fostered international collaboration, and ensured that gender responsiveness was embedded within science and innovation agendas worldwide.
Prof. Roseanne Diab’s legacy lives on not only through the institutions she strengthened and the policies she helped shape, but through the people whose lives and careers she touched. She is remembered for her quiet strength, her generosity of spirit, and her unwavering belief in the power of science to serve humanity. Roseanne was an incredible person and a passionate advocate for gender equity in science, particularly within science academies. Her contributions have made a lasting impact, and she will be deeply missed by all who knew her. To her colleagues, she was a trusted leader and a principled voice. To students and early-career scientists, she was a steadfast mentor who offered encouragement, opportunities, and guidance with humility and care. Her commitment to equity, excellence, and integrity continues to inspire those who carry her work forward. She will be deeply missed and enduringly honoured for the paths she opened and the values she lived by.
Prof. Diab will be remembered not only for her intellectual contributions but also for her kindness, humility, warmth, joy for life and always doing the right thing. Her legacy lives on in the students she mentored, the collaborations she established, and the scientific community she so deeply enriched. Her presence will be sorely missed, but she will remain a guiding light for generations to come.
Our deepest condolences to her family, friends and colleagues.
Quarraisha Abdool Karim,
TWAS President
11 November 1949 – 10 January 2026
It is with deep sadness that we share the news of the death of TWAS Fellow Prof. Roseanne Diab.
Prof. Diab, was a distinguished South African researcher and global science leader whose career left an enduring impact on atmospheric science, science policy, and global efforts to advance gender equity in science, innovation, technology and engineering. She served as director of Gender in Science, Innovation, Technology and Engineering (GenderInSITE), an initiative hosted by TWAS’s partner OWSD, and previously as chief executive officer of the Academy of Science of South Africa (ASSAf).
An internationally respected atmospheric scientist, Prof. Diab made significant scholarly contributions to the fields of air quality, climate change, atmospheric dispersion modelling, and tropospheric ozone research. Her academic career at the University of KwaZulu-Natal, where she later held emeritus professor status, was marked by scientific rigour, intellectual curiosity, and a deep commitment to postgraduate training and mentorship.
Beyond her scientific achievements, Prof. Diab was an active Fellow of TWAS and the ASSAf. As a member of the TWAS Gender Advisory Committee, she contributed to an insightful and granular analysis of the root cause of gender divides by scientific discipline to unravel systemic gender gaps that was exemplary of her commitment and attention to detail in whatever she undertook. Her thoughtful analyses and dedication to equality in science were invaluable. Her proposal to accelerate progress to closing the gender gap in TWAS through dedicated years of female only Fellows was adopted at the recent TWAS General Conference in Rio de Janiero, Brazil. Unfortunately, her failing health precluded her participation in Rio. Notwithstanding, she was delighted to learn about the TWAS strategy which is expected to achieve gender parity in membership elections by 2032 through a balanced yet ambitious approach. In particular, the plan to dedicate every third fellowship election cycle exclusively to women represents a significant intervention, one that will substantially accelerate progress and dramatically shift the trajectory toward gender balance.
My interactions with her during her tenure as executive officer of the Academy of Science of South Africa, exposed me to the pivotal role she played in strengthening the Academy’s voice in science advice and evidence-informed policymaking. Her leadership as vice-president helped consolidate ASSAf’s national relevance and international standing, and was characterised by integrity, inclusivity, and a firm belief in science as a public good.
In her role as director of GenderInSITE, Prof. Diab became a globally recognised advocate for gender equality in science systems. She led initiatives that addressed the structural and systemic barriers faced by women and girls in STEM, fostered international collaboration, and ensured that gender responsiveness was embedded within science and innovation agendas worldwide.
Prof. Roseanne Diab’s legacy lives on not only through the institutions she strengthened and the policies she helped shape, but through the people whose lives and careers she touched. She is remembered for her quiet strength, her generosity of spirit, and her unwavering belief in the power of science to serve humanity. Roseanne was an incredible person and a passionate advocate for gender equity in science, particularly within science academies. Her contributions have made a lasting impact, and she will be deeply missed by all who knew her. To her colleagues, she was a trusted leader and a principled voice. To students and early-career scientists, she was a steadfast mentor who offered encouragement, opportunities, and guidance with humility and care. Her commitment to equity, excellence, and integrity continues to inspire those who carry her work forward. She will be deeply missed and enduringly honoured for the paths she opened and the values she lived by.
Prof. Diab will be remembered not only for her intellectual contributions but also for her kindness, humility, warmth, joy for life and always doing the right thing. Her legacy lives on in the students she mentored, the collaborations she established, and the scientific community she so deeply enriched. Her presence will be sorely missed, but she will remain a guiding light for generations to come.
Our deepest condolences to her family, friends and colleagues.
Quarraisha Abdool Karim,
TWAS President
January 22, 2026
I've heard the very sad news about Roseanne - so sorry to hear about her death.
I work at the Royal Society in the UK, and had the pleasure of working with her over the years when she was at ASSAf. She really was a joy to work with in so many ways.
Sir Martyn Poliakoff, one of our former Foreign Secretaries, met her a number of times when in post. He has said " She was a delightful and very impressive person. Please pass on my condolences."
Take care, and my sincere condolences to you and your family.
Ruth
I work at the Royal Society in the UK, and had the pleasure of working with her over the years when she was at ASSAf. She really was a joy to work with in so many ways.
Sir Martyn Poliakoff, one of our former Foreign Secretaries, met her a number of times when in post. He has said " She was a delightful and very impressive person. Please pass on my condolences."
Take care, and my sincere condolences to you and your family.
Ruth
January 22, 2026
I shared the deeply saddening news of your mother's death with Christiane (here in copy). She and I worked together over many years on several projects with the South African Academy of Science and thus with Roseanne. Christiane and I discussed how impressed we were by her personality and charm and professionalism when we worked with her. And we decided to write to you together.
For us, Roseanne was at first simply an outstanding colleague. Her intelligence, analytical capacities and efficiency in getting things done with her team was combined with such an affable personality! We soon considered her more a friend than a colleague. There were numerous times when only through exchange of ideas with her or intervention from her very complex and difficult situations got resolved. She was such a stellar counterpart for us at ASSAf and in IAP that her involvement always gave us the confidence that projects would produce excellent results and come to a good close. This in view of the fact that projects were often extremely complex involving sometimes hundreds of scientists and other experts from dozens of countries.
We remember many occasions when we spend time with your mother - once even also with your father, we think it was at Seoul airport - where Roseanne's warmth, her humour and intelligence shone through brightly. We consider having met and cooperated with her over many years as a real privilege and a gift in our lives. We will treasure her memory.
We are sending you our heartfelt condolences. Together with you, we are profoundly grateful for the life of Roseanne.
Volker and Christiane
For us, Roseanne was at first simply an outstanding colleague. Her intelligence, analytical capacities and efficiency in getting things done with her team was combined with such an affable personality! We soon considered her more a friend than a colleague. There were numerous times when only through exchange of ideas with her or intervention from her very complex and difficult situations got resolved. She was such a stellar counterpart for us at ASSAf and in IAP that her involvement always gave us the confidence that projects would produce excellent results and come to a good close. This in view of the fact that projects were often extremely complex involving sometimes hundreds of scientists and other experts from dozens of countries.
We remember many occasions when we spend time with your mother - once even also with your father, we think it was at Seoul airport - where Roseanne's warmth, her humour and intelligence shone through brightly. We consider having met and cooperated with her over many years as a real privilege and a gift in our lives. We will treasure her memory.
We are sending you our heartfelt condolences. Together with you, we are profoundly grateful for the life of Roseanne.
Volker and Christiane
January 22, 2026
Slim and I are deeply saddened to learn that your Mom has passed away.
Our condolences to you and your family and we wish you all lots of strength and courage during this period of acute grief and may you draw on many treasured memories gathered during her rich and full life.
She was an exceptional scientist and leader and she will be sorely missed in thescientific community and particularly the various science academies that she played a key role in.
Our condolences to you and your family and we wish you all lots of strength and courage during this period of acute grief and may you draw on many treasured memories gathered during her rich and full life.
She was an exceptional scientist and leader and she will be sorely missed in thescientific community and particularly the various science academies that she played a key role in.
January 22, 2026
It is with great sadness that I learned this morning of Roseanne’s passing. She meant so much to me during my career at ASSAf and was one of my greatest mentors in life. She was the driving force who encouraged me to pursue my Master’s degree (cum laude), and even the last time I saw her, she asked when I would be starting my doctorate.
She was truly an extraordinary woman and an inspiration to us all—always supportive, gracious, impeccably dressed, and leading by example. Her wisdom and insight during Council meetings were profound.
She will be deeply missed.
Please accept my sincerest condolences. You are in my thoughts and prayers. Thank you as well for being there for her—what a privilege it was.
She will remain as a huge icon in my life and I was blessed to be mentored under her leadership—what an inspiration she was.
Warm regards, my arms are folded around you.
She was truly an extraordinary woman and an inspiration to us all—always supportive, gracious, impeccably dressed, and leading by example. Her wisdom and insight during Council meetings were profound.
She will be deeply missed.
Please accept my sincerest condolences. You are in my thoughts and prayers. Thank you as well for being there for her—what a privilege it was.
She will remain as a huge icon in my life and I was blessed to be mentored under her leadership—what an inspiration she was.
Warm regards, my arms are folded around you.
January 22, 2026
I’m so sorry for you all but please find comfort in knowing what a full life Roseanne led: she has real professional legacy and I’m sure the academy will pay tribute to her as an inspiring leader and thoroughly lovely person. I’m grateful I got to work with her all those years ago when I worked for the UK’s counterpart. Most importantly though, her family legacy, as a mother, grandmother, sister and wife. A truly loved and wonderful person.
January 22, 2026
I am so sorry to hear that your Mom has passed away. My sincere condolences to your Dad and all the other family members.
She was such a wonderful person, it seems hard to believe that she is gone. Mary and I remember with great pleasure the wonderful trip that we had with your Mom and Dad to Tibet such a unique experience.
Hope that your memories of her will sustain you all at this dificult time.
Kind regards,
Robin
She was such a wonderful person, it seems hard to believe that she is gone. Mary and I remember with great pleasure the wonderful trip that we had with your Mom and Dad to Tibet such a unique experience.
Hope that your memories of her will sustain you all at this dificult time.
Kind regards,
Robin
January 22, 2026
Thank you for sharing this heartfelt and deeply personal update with us. My heart aches as I read your words, and I am so incredibly sorry to hear about everything your mom—and your entire family—is going through. Please know that you, your mom, and your family are in my thoughts and prayers during this immensely difficult time.
The love and respect we all hold for Roseanne is a testament to how deeply she has touched so many lives—including through that beautiful birthday book, which speaks volumes about the love surrounding her.
It is heartbreaking to hear of the relentless challenges she has faced, and I can only imagine the emotional weight you are carrying. Your strength.
Please know that my thoughts are with you and your family, and I am here to support you in any way I can.
Sending you so much love, strength, and warmth. May you continue to draw strength from being together as a family, and may your mom feel surrounded by all the love and prayers being sent her way.
With deepest care and sympathy,
Mohamed Hassan
The love and respect we all hold for Roseanne is a testament to how deeply she has touched so many lives—including through that beautiful birthday book, which speaks volumes about the love surrounding her.
It is heartbreaking to hear of the relentless challenges she has faced, and I can only imagine the emotional weight you are carrying. Your strength.
Please know that my thoughts are with you and your family, and I am here to support you in any way I can.
Sending you so much love, strength, and warmth. May you continue to draw strength from being together as a family, and may your mom feel surrounded by all the love and prayers being sent her way.
With deepest care and sympathy,
Mohamed Hassan
January 20, 2026
The Organization for Women in Science for the Developing World (OWSD) joins the global scientific community in mourning the passing and celebrating the life of Prof. Roseanne Diab. Prof. Diab was an ardent supporter of gender in and for science, demonstrated by a distinguished career and her immense contributions to advancing gender equality in support of scientific excellence.
Prof. Diab was an eminent atmospheric scientist who epitomised women’s contributions to science through her research on air quality, atmospheric pollution, tropospheric ozone variability, and climate change. She produced the first estimates of wind power potential in South Africa, publishing the first Wind Atlas of South Africa in 1995. Prof Diab also bridged academia and policy through her service to the International Ozone Commission (IOC), the Commission on Atmospheric Chemistry and Global Pollution (CACGP), the World Climate Research Programme (WCRP), and as Co-Chair of the InterAcademy Council (IAP) panel reviewing the Intergovernmental Panel on Climate Change (IPCC).
When Prof. Diab transitioned from academia to lead the Academy of Science of South Africa (ASSAf), she brought along her passion for gender equality in science. During her tenure, ASSAf established the OWSD South Africa National Chapter and became the Southern African focal point of GenderInSITE, an international initiative aimed at raising awareness among decision-makers on the gender and science, innovation, technology, and engineering (SITE) dimensions of development. Under her leadership, the first global survey of women in science at academies of science was conducted, providing concrete recommendations to advance gender equity. Following her tenure at ASSAf, Prof Diab served as Director of GenderInSITE and chaired the Gender Advisory Committee of The World Academy of Sciences (TWAS). She firmly believed that reforming scientific institutions through deliberate policies and actions would promote excellence and create a scientific enterprise that is inclusive for all.
Prof. Diab emerged as a global leader in STEM education, particularly in gender equity and sustainability science. Through her directorships at ASSAf and GenderInSITE, she made significant contributions to the scholarship and leadership of our multidisciplinary community and became a pivotal figure in advancing its mission.
We celebrate Prof. Diab’s dedication to mentoring women in science, raising awareness of gender in and for science among policymakers, and leading institutional initiatives that increased women’s participation in science.
We mourn Prof. Diab's passing and remember her dedication, unwavering commitment, excellence, and generosity. We stand with her family, loved ones, and the scientific community in celebrating an extraordinary life and enduring legacy.
Prof. Diab was an eminent atmospheric scientist who epitomised women’s contributions to science through her research on air quality, atmospheric pollution, tropospheric ozone variability, and climate change. She produced the first estimates of wind power potential in South Africa, publishing the first Wind Atlas of South Africa in 1995. Prof Diab also bridged academia and policy through her service to the International Ozone Commission (IOC), the Commission on Atmospheric Chemistry and Global Pollution (CACGP), the World Climate Research Programme (WCRP), and as Co-Chair of the InterAcademy Council (IAP) panel reviewing the Intergovernmental Panel on Climate Change (IPCC).
When Prof. Diab transitioned from academia to lead the Academy of Science of South Africa (ASSAf), she brought along her passion for gender equality in science. During her tenure, ASSAf established the OWSD South Africa National Chapter and became the Southern African focal point of GenderInSITE, an international initiative aimed at raising awareness among decision-makers on the gender and science, innovation, technology, and engineering (SITE) dimensions of development. Under her leadership, the first global survey of women in science at academies of science was conducted, providing concrete recommendations to advance gender equity. Following her tenure at ASSAf, Prof Diab served as Director of GenderInSITE and chaired the Gender Advisory Committee of The World Academy of Sciences (TWAS). She firmly believed that reforming scientific institutions through deliberate policies and actions would promote excellence and create a scientific enterprise that is inclusive for all.
Prof. Diab emerged as a global leader in STEM education, particularly in gender equity and sustainability science. Through her directorships at ASSAf and GenderInSITE, she made significant contributions to the scholarship and leadership of our multidisciplinary community and became a pivotal figure in advancing its mission.
We celebrate Prof. Diab’s dedication to mentoring women in science, raising awareness of gender in and for science among policymakers, and leading institutional initiatives that increased women’s participation in science.
We mourn Prof. Diab's passing and remember her dedication, unwavering commitment, excellence, and generosity. We stand with her family, loved ones, and the scientific community in celebrating an extraordinary life and enduring legacy.
January 15, 2026
I first met Roseanne when I spent a year in South Africa in 1976 and she and Richard were always so kind and welcoming. I have so many happy memories of times spent with them, Bev and Kel and Mr and Mrs Traynor, on holiday in the Drakensberg, on picnics, at Christmas and so many other family gatherings.
In late 1986 Roseanne flew out to Wellington, New Zealand to present a paper and then she flew up to Hamilton and spent 3 days with my family and I. She was wonderful with my 2 young boys and you could tell she loved family times. She will be greatly missed by so many people.
In late 1986 Roseanne flew out to Wellington, New Zealand to present a paper and then she flew up to Hamilton and spent 3 days with my family and I. She was wonderful with my 2 young boys and you could tell she loved family times. She will be greatly missed by so many people.
January 15, 2026
PART B
You had a really big desk in your office and a very comfortable chair – I used them both while you were away in the USA for the Fullbright Scholarship and I lectured all your courses. I remember one afternoon, knocking on your door, knowing you were in your office but not getting an answer. I became concerned and knocked louder. Eventually I heard you and I opened your door, peeped inside, and you had sleep creases on your face. You were so embarrassed but we had a little laugh and carried on. The embarrassment was returned one day in the staff room during tea time when I made a remark that I had heard my husband say, thinking nothing of it, and you reprimanded me for making a very unladylike comment about male genitals! I went home and asked Dion what I had said and he explained and did I feel like a right idiot – I still do today!
There were so many sound pieces of advice that you gave me over the years, but one of the best ones was to do my PhD at a different university. You helped me make contact with your past PhD student, Dr Greg Bodeker, in New Zealand, and you funded my overseas research trip to Australia and New Zealand to plan a PhD project – I ended up doing my PhD at the University of Otago thanks to your help with a National Research Foundation Study Aboard Scholarship. It was my first flight overseas and you loaned me a blow-up, neck pillow. You also told me to keep all my boarding passes and start my voyager miles account – I think you knew the travel bug would bite as it had bitten you! I was inspired by your travels and have followed in your footsteps in my academic career with dozens of overseas trips. Travelling with you, Richard and your other students to the UK and the University of Bristol in 2008 was a memorable trip, as well the trip to Denver to the World Climate Research Programme meeting – you, Richard and I marching through airports, me losing my boarding pass and the drama of trying to return back to where we had already been cleared through in the airport.
In 2024, we fortuitously happened to meet each other in the Johannesburg Airport International Slow Lounge and had a wonderful catch-up about all things academia in South Africa and the world. I have forgotten the exact context of the conversation, but you were super passionate about a particular topic, in fact, you were angered by something and it was the one and only time in all the years I have known you that I heard you swear!
As I read all these wonderful messages about you from people all over the world, I am in awe of how many lives you impacted during the course of your amazing time on earth. You had a way of making each of us feel special, and you gave of your time like nothing else mattered. You shared snippets about your family and personal life which made you human, despite the gargantuan roles you played in science in South Africa and abroad. I had a very teary moment on Wednesday when I removed you as a reference on my CV. It felt so final; I really cannot believe I can’t pick up the phone and call you again. I thank Richard, Paula, Michelle and Michael for sharing your amazing wife and mum with all of us. Roseanne, you will always have a place in my heart and your wise words will reside in my mind for the rest of my life. You are sorely missed.
With love and very best wishes,
Caradee
You had a really big desk in your office and a very comfortable chair – I used them both while you were away in the USA for the Fullbright Scholarship and I lectured all your courses. I remember one afternoon, knocking on your door, knowing you were in your office but not getting an answer. I became concerned and knocked louder. Eventually I heard you and I opened your door, peeped inside, and you had sleep creases on your face. You were so embarrassed but we had a little laugh and carried on. The embarrassment was returned one day in the staff room during tea time when I made a remark that I had heard my husband say, thinking nothing of it, and you reprimanded me for making a very unladylike comment about male genitals! I went home and asked Dion what I had said and he explained and did I feel like a right idiot – I still do today!
There were so many sound pieces of advice that you gave me over the years, but one of the best ones was to do my PhD at a different university. You helped me make contact with your past PhD student, Dr Greg Bodeker, in New Zealand, and you funded my overseas research trip to Australia and New Zealand to plan a PhD project – I ended up doing my PhD at the University of Otago thanks to your help with a National Research Foundation Study Aboard Scholarship. It was my first flight overseas and you loaned me a blow-up, neck pillow. You also told me to keep all my boarding passes and start my voyager miles account – I think you knew the travel bug would bite as it had bitten you! I was inspired by your travels and have followed in your footsteps in my academic career with dozens of overseas trips. Travelling with you, Richard and your other students to the UK and the University of Bristol in 2008 was a memorable trip, as well the trip to Denver to the World Climate Research Programme meeting – you, Richard and I marching through airports, me losing my boarding pass and the drama of trying to return back to where we had already been cleared through in the airport.
In 2024, we fortuitously happened to meet each other in the Johannesburg Airport International Slow Lounge and had a wonderful catch-up about all things academia in South Africa and the world. I have forgotten the exact context of the conversation, but you were super passionate about a particular topic, in fact, you were angered by something and it was the one and only time in all the years I have known you that I heard you swear!
As I read all these wonderful messages about you from people all over the world, I am in awe of how many lives you impacted during the course of your amazing time on earth. You had a way of making each of us feel special, and you gave of your time like nothing else mattered. You shared snippets about your family and personal life which made you human, despite the gargantuan roles you played in science in South Africa and abroad. I had a very teary moment on Wednesday when I removed you as a reference on my CV. It felt so final; I really cannot believe I can’t pick up the phone and call you again. I thank Richard, Paula, Michelle and Michael for sharing your amazing wife and mum with all of us. Roseanne, you will always have a place in my heart and your wise words will reside in my mind for the rest of my life. You are sorely missed.
With love and very best wishes,
Caradee
January 15, 2026
PART A
Dear Roseanne,
In October, when you told me you could no longer do any work for me, and shared the shocking news that you were ill, my heart sank and a lump formed in my throat. I thought, how could the strongest woman I know be dealt such a challenge to your body, knowing full well your mind would be wanting to overcome anything and everything. But I was worried. Cancer at a late stage is tough to overcome; my mind was telling me, this may end soon, and I need to do all I can to speak with you, see you and tell you how much you mean to me. With the flowers I sent to you, I sent small notes, but they could never possibly convey my appreciation and concern for you. I called you in the mornings when you were stronger and asked for your advice for a recent happening at work. You advised me with wise words to try but not expect a positive outcome because I am still very young, and I have time. I visited you and Richard on the 21st December at your beautiful home in Kloof; a home I had been to before for your 60th birthday celebration. I watched as you slowly moved around the kitchen with Richard, almost in a dance together, as you gathered tea cups and saucers, a tea pot, milk jug, sugar, tea spoons and rusks. You looked different but you were the same Roseanne on the inside; I knew so when we spoke and your mannerisms were just as I knew them to be. Always with a pregnant pause before sharing your thoughts or advice. I listened and chose my words carefully; despite knowing you for 28 years (half my life) I still get nervous when I speak with you in the face of your strength, wisdom and presence. You and Richard encouraged me to take a true break from work and spend time during the holidays with my family, especially my girls. I did just that, and it was wonderful – many happy memories were made. In your last WhatsApp message to me on the 22 December, you thanked me for the visit, but I thank you for making time to see me when you were feeling so tired and ill.
It has been very difficult to sit here and recount my memories with you. Twenty-eight years is a long time but you have been a part of each of those years in one way or another. When I started attending your lectures in 1997 at the previously called University of Natal (now UKZN), I remember your overhead projector slides were so neat and well organized. You commanded attention from the room and I was mesmerized. I wanted to be just like you – an astute academic.
Towards the end of my third year, I was planning on starting my Honours the following year but I didn’t have a project topic. I thought about a pipeline and waste water project, but I wasn’t convinced it was for me. I spoke with you about doing something in the atmospheric sciences. You said you would think about it. The next day, we met and you told me that you had been sitting outside the gym waiting for Michael and the sun was streaming into the car on your arm and you felt your skin burn. You wondered if there was a way we could assess solar ultraviolet radiation (UCR) exposure and health risks. I researched all I could about these types of studies and my Honours project using a health risk assessment tool was born. Following that, we decided we needed actual measurements of solar UVR and so I found the world expert, Professor Brian Diffey, sold a special film that you could use to measure UVR. Without hesitation, you said we should buy some of this film and that you had a small pot of money to pay for it. I think we were both super excited about the novelty of the work, especially for South Africa. You made me do all the paperwork and correspondence with Professor Diffey, you introduced me to Professor Bice Martincigh at Chemistry to help me with the photochemistry and Dr Arnold Prause at Physics to give me access to the Physics Building Tower – the highest point on campus and necessary for the calibration work. I have never overcome my fear of heights after spending three weeks in that tower, climbing onto the roof every 10 minutes to remove a piece of film. This work constituted my Masters’ project. Despite placing the film strips on the roof, as well as on 30 schoolchildren for two weeks, you thought I needed more data. ‘Let’s measure solar UVR exposure across the body parts,’ you suggested. I was thinking I have such fair skin, I couldn’t stand in the sun, but what about a mannequin. So, I bought a clothing store mannequin, dressed her in a black bikini and she stood on the roof outside your office for several weeks, while I turned her North, East, South, West every 30 minutes – exiting via your office door (I tried not to be disturbing). With that data finally in hand, I presented it all to you and yet again, you thought we could do more. ‘What about some data to make an activity model for different body parts? ‘ you suggested. Yikes, I thought. How will I do that? ‘If we had three or four people doing different sports or activities for 8 hours in a day and we place film on them, we would get the data we need,’ you said. Now who could I ask to do different activities outdoors for 8 hours? Despite the ethics of this approach (which I did not fully understand back then) Dad, Mum and I were the participants and spent one Saturday playing tennis, swimming and walking wearing the film patches to gather the data we needed for the model. Despite wearing sunscreen, we all got sunburnt!
I think I may have driven you slightly mad since I would be standing outside your office from around 6h30 every morning waiting for you to arrive to help me with the work I had done the day / night before. As a Professor myself now, I do need some time to sort myself out in the mornings; time I did not give you and I am sorry for that – I was just so excited to show you my results. I was also working as your research assistant and so diligently asked you daily for more work. These tasks ranged from compiling reference lists, updating your CV, organizing books and preparing lecture notes. But the most exciting task was sorting out all your boarding passes for the claims for voyager miles. Back then, I had to gather all the passes, put them into chronological order, stick them onto paper, and put them into an envelope to mail to an address near the Johannesburg airport. Having never flown overseas myself at the time, I had no clue what the fuss was all about when you misplaced a boarding pass and asked me to help you search your desk until we found it.
Dear Roseanne,
In October, when you told me you could no longer do any work for me, and shared the shocking news that you were ill, my heart sank and a lump formed in my throat. I thought, how could the strongest woman I know be dealt such a challenge to your body, knowing full well your mind would be wanting to overcome anything and everything. But I was worried. Cancer at a late stage is tough to overcome; my mind was telling me, this may end soon, and I need to do all I can to speak with you, see you and tell you how much you mean to me. With the flowers I sent to you, I sent small notes, but they could never possibly convey my appreciation and concern for you. I called you in the mornings when you were stronger and asked for your advice for a recent happening at work. You advised me with wise words to try but not expect a positive outcome because I am still very young, and I have time. I visited you and Richard on the 21st December at your beautiful home in Kloof; a home I had been to before for your 60th birthday celebration. I watched as you slowly moved around the kitchen with Richard, almost in a dance together, as you gathered tea cups and saucers, a tea pot, milk jug, sugar, tea spoons and rusks. You looked different but you were the same Roseanne on the inside; I knew so when we spoke and your mannerisms were just as I knew them to be. Always with a pregnant pause before sharing your thoughts or advice. I listened and chose my words carefully; despite knowing you for 28 years (half my life) I still get nervous when I speak with you in the face of your strength, wisdom and presence. You and Richard encouraged me to take a true break from work and spend time during the holidays with my family, especially my girls. I did just that, and it was wonderful – many happy memories were made. In your last WhatsApp message to me on the 22 December, you thanked me for the visit, but I thank you for making time to see me when you were feeling so tired and ill.
It has been very difficult to sit here and recount my memories with you. Twenty-eight years is a long time but you have been a part of each of those years in one way or another. When I started attending your lectures in 1997 at the previously called University of Natal (now UKZN), I remember your overhead projector slides were so neat and well organized. You commanded attention from the room and I was mesmerized. I wanted to be just like you – an astute academic.
Towards the end of my third year, I was planning on starting my Honours the following year but I didn’t have a project topic. I thought about a pipeline and waste water project, but I wasn’t convinced it was for me. I spoke with you about doing something in the atmospheric sciences. You said you would think about it. The next day, we met and you told me that you had been sitting outside the gym waiting for Michael and the sun was streaming into the car on your arm and you felt your skin burn. You wondered if there was a way we could assess solar ultraviolet radiation (UCR) exposure and health risks. I researched all I could about these types of studies and my Honours project using a health risk assessment tool was born. Following that, we decided we needed actual measurements of solar UVR and so I found the world expert, Professor Brian Diffey, sold a special film that you could use to measure UVR. Without hesitation, you said we should buy some of this film and that you had a small pot of money to pay for it. I think we were both super excited about the novelty of the work, especially for South Africa. You made me do all the paperwork and correspondence with Professor Diffey, you introduced me to Professor Bice Martincigh at Chemistry to help me with the photochemistry and Dr Arnold Prause at Physics to give me access to the Physics Building Tower – the highest point on campus and necessary for the calibration work. I have never overcome my fear of heights after spending three weeks in that tower, climbing onto the roof every 10 minutes to remove a piece of film. This work constituted my Masters’ project. Despite placing the film strips on the roof, as well as on 30 schoolchildren for two weeks, you thought I needed more data. ‘Let’s measure solar UVR exposure across the body parts,’ you suggested. I was thinking I have such fair skin, I couldn’t stand in the sun, but what about a mannequin. So, I bought a clothing store mannequin, dressed her in a black bikini and she stood on the roof outside your office for several weeks, while I turned her North, East, South, West every 30 minutes – exiting via your office door (I tried not to be disturbing). With that data finally in hand, I presented it all to you and yet again, you thought we could do more. ‘What about some data to make an activity model for different body parts? ‘ you suggested. Yikes, I thought. How will I do that? ‘If we had three or four people doing different sports or activities for 8 hours in a day and we place film on them, we would get the data we need,’ you said. Now who could I ask to do different activities outdoors for 8 hours? Despite the ethics of this approach (which I did not fully understand back then) Dad, Mum and I were the participants and spent one Saturday playing tennis, swimming and walking wearing the film patches to gather the data we needed for the model. Despite wearing sunscreen, we all got sunburnt!
I think I may have driven you slightly mad since I would be standing outside your office from around 6h30 every morning waiting for you to arrive to help me with the work I had done the day / night before. As a Professor myself now, I do need some time to sort myself out in the mornings; time I did not give you and I am sorry for that – I was just so excited to show you my results. I was also working as your research assistant and so diligently asked you daily for more work. These tasks ranged from compiling reference lists, updating your CV, organizing books and preparing lecture notes. But the most exciting task was sorting out all your boarding passes for the claims for voyager miles. Back then, I had to gather all the passes, put them into chronological order, stick them onto paper, and put them into an envelope to mail to an address near the Johannesburg airport. Having never flown overseas myself at the time, I had no clue what the fuss was all about when you misplaced a boarding pass and asked me to help you search your desk until we found it.
January 15, 2026
Very sad to learn of Roseanne’s passing. Heartfelt condolences to the entire family.
I met the Diabs as a “mature” Canadian Masters student who was helping organize a session at the International Association for Impact Assessment conference in Durban in 1995. Roseanne was my liaison professor. I had managed to secure barely enough funding from my university to attend. But as an avid rugby guy, I also wrangled 6 tickets to the Rugby World Cup semi-final in Durban from Rugby Canada, taking place a week before the conference. The colleagues who said they would use those tickets all backed out at the last minute. When I mentioned this calamity to Roseanne, I received an instantaneous reply by email: “Don’t do anything with those tickets!”
Roseanne offered a sweet deal. She would put me up in her home for 10 days before the conference, in exchange for 5 of those tickets that were worth our weight in Krugerrands. I had no idea where the tickets were situated in the stadium. They might have been in the car park for all I knew. Didn’t matter to the equally rugby mad Diabs. “Agreed,” I said.
Richard and Roseanne and family were very welcoming and generous. Roseanne picked me up at the airport. Gave me a driving tour of Durban. Took me to her lovely home to meet King Richard the Lionheart, who was kind but desperate to see the tickets he had traded for more than a week with a 6ft. 3in. former second row forward. An uncivilized Canadian, no less! The burdens we bear!
Turned out the seats were in the section reserved for players and their families, low and in the centre. Not such a bad trade after all. Even though we nearly drowned in the downpour (“it never rains heavily here at this time of year,” said Richard) it was a memorable match. Springboks versus France, decided in the last minute. Google it. We were there.
I have several other stories from that trip, which wouldn’t have happened without the famous Diab hospitality. Richard in the bar and mud wrestling tent. Defrosting the freezer. Watching the RWC final in a teeming pub. A mini safari to Mabibi. Water-skiing and braai at Pietermaritzburg. A successful IAIA conference. Winning a great deal of money on Teal in the Durban July Handicap. Roseanne’s often bemused expression when I shared the stories. “You did WHAT?!”
I can’t believe she’s no longer with us.
I met the Diabs as a “mature” Canadian Masters student who was helping organize a session at the International Association for Impact Assessment conference in Durban in 1995. Roseanne was my liaison professor. I had managed to secure barely enough funding from my university to attend. But as an avid rugby guy, I also wrangled 6 tickets to the Rugby World Cup semi-final in Durban from Rugby Canada, taking place a week before the conference. The colleagues who said they would use those tickets all backed out at the last minute. When I mentioned this calamity to Roseanne, I received an instantaneous reply by email: “Don’t do anything with those tickets!”
Roseanne offered a sweet deal. She would put me up in her home for 10 days before the conference, in exchange for 5 of those tickets that were worth our weight in Krugerrands. I had no idea where the tickets were situated in the stadium. They might have been in the car park for all I knew. Didn’t matter to the equally rugby mad Diabs. “Agreed,” I said.
Richard and Roseanne and family were very welcoming and generous. Roseanne picked me up at the airport. Gave me a driving tour of Durban. Took me to her lovely home to meet King Richard the Lionheart, who was kind but desperate to see the tickets he had traded for more than a week with a 6ft. 3in. former second row forward. An uncivilized Canadian, no less! The burdens we bear!
Turned out the seats were in the section reserved for players and their families, low and in the centre. Not such a bad trade after all. Even though we nearly drowned in the downpour (“it never rains heavily here at this time of year,” said Richard) it was a memorable match. Springboks versus France, decided in the last minute. Google it. We were there.
I have several other stories from that trip, which wouldn’t have happened without the famous Diab hospitality. Richard in the bar and mud wrestling tent. Defrosting the freezer. Watching the RWC final in a teeming pub. A mini safari to Mabibi. Water-skiing and braai at Pietermaritzburg. A successful IAIA conference. Winning a great deal of money on Teal in the Durban July Handicap. Roseanne’s often bemused expression when I shared the stories. “You did WHAT?!”
I can’t believe she’s no longer with us.
January 15, 2026
I am deeply saddened by the loss of Roseanne and send my condolences to Richard, her children and their families. Roseanne was an amazing person with an inspiring list of achievements and tremendous work ethic. I am thankful to have been one of her students and then to have worked under her leadership at UKZN. At the time, I took so much of the joy, collegiality, hard work and high standards of our department for granted. Later, I realised what a privilege it was to have my education and early career fostered in that environment and through the kind of generous, principled leadership which Roseanne provided. I also benefited from her quiet encouragement as I began to juggle work and motherhood.
I have two specific memories of Roseanne that I wanted to share.
First, I recall going into her office at the start of my PhD studies and bursting into tears because my funding had been refused. Roseanne looked me in the eye and said kindly but firmly, 'stop crying, we will sort it out'. There was nothing else to do but stop crying :) She got on the phone, pleaded my case, got some help with the technicalities, and a few days later my funding was reinstated. That was Roseanne, energy invested in the solution rather than the fuss. A great lesson to me and a wonderful outcome which ultimately helped me to complete my doctorate.
Second, in the late 1990s I was a student in Roseanne's third year atmospheric science class. Our lectures were held in Shepstone Building and Roseanne would walk across from the department to give the lectures. One day she was uncharacteristically late for the start of a lecture and she burst into the venue with a bright red face and none of her usual decorum. She apologised and exclaimed that her life had just flashed before her eyes! She had been stuck in one of the old lifts in MTB, which had suddenly dropped down, lost its lighting, and had sort of bounced down to ground level. She sat for a minute or two as she tried to calm down, and then insisted that she give some sort of lecture. And so she carried on. At the end of the (brief) lecture, she said she was rushing off to phone Richard because life was too short, that she'd run out the front door that morning and needed to retrace some of those steps! Who knows what was taught in class that day! I certainly don't remember; we were all much more interested in the plummeting lift experience! And I don't think I saw her in such a flap ever again. But the memory of the day has stayed and it has made me smile many times, most especially in moments when I tuck my daily life under my wings and put on my lecturer face to begin a class. I wish I had asked her whether she ever went in that lift again.
Farewell Roseanne, thank you for all the lessons in atmospheric science, environmental management, academic life and leadership. Thank you for your support and the many opportunities you gave to me and so many others. You will be missed.
I have two specific memories of Roseanne that I wanted to share.
First, I recall going into her office at the start of my PhD studies and bursting into tears because my funding had been refused. Roseanne looked me in the eye and said kindly but firmly, 'stop crying, we will sort it out'. There was nothing else to do but stop crying :) She got on the phone, pleaded my case, got some help with the technicalities, and a few days later my funding was reinstated. That was Roseanne, energy invested in the solution rather than the fuss. A great lesson to me and a wonderful outcome which ultimately helped me to complete my doctorate.
Second, in the late 1990s I was a student in Roseanne's third year atmospheric science class. Our lectures were held in Shepstone Building and Roseanne would walk across from the department to give the lectures. One day she was uncharacteristically late for the start of a lecture and she burst into the venue with a bright red face and none of her usual decorum. She apologised and exclaimed that her life had just flashed before her eyes! She had been stuck in one of the old lifts in MTB, which had suddenly dropped down, lost its lighting, and had sort of bounced down to ground level. She sat for a minute or two as she tried to calm down, and then insisted that she give some sort of lecture. And so she carried on. At the end of the (brief) lecture, she said she was rushing off to phone Richard because life was too short, that she'd run out the front door that morning and needed to retrace some of those steps! Who knows what was taught in class that day! I certainly don't remember; we were all much more interested in the plummeting lift experience! And I don't think I saw her in such a flap ever again. But the memory of the day has stayed and it has made me smile many times, most especially in moments when I tuck my daily life under my wings and put on my lecturer face to begin a class. I wish I had asked her whether she ever went in that lift again.
Farewell Roseanne, thank you for all the lessons in atmospheric science, environmental management, academic life and leadership. Thank you for your support and the many opportunities you gave to me and so many others. You will be missed.
January 15, 2026
Roseanne
as close colleagues for 30 years I was able to witness what an extraordinary person you were. Your strong and thoughtful leadership, academic brilliance and powerful research ethic was a lesson to behold. Your sensitive care with students was a positive influence on many young lives and kick started many important careers. Your contribution to South African and global climate science was immense, as was your influence on science education.
Yet you remained humble and kind in every sphere of life, and you will be sorely missed not only by your family, but by all who had the good fortune to interact with you.
Richard, Paula, Michelle and Micheal, we all grieve with you in your sad loss, and remember Roseanne for the truly wonderful person she was.
Gerry Garland
as close colleagues for 30 years I was able to witness what an extraordinary person you were. Your strong and thoughtful leadership, academic brilliance and powerful research ethic was a lesson to behold. Your sensitive care with students was a positive influence on many young lives and kick started many important careers. Your contribution to South African and global climate science was immense, as was your influence on science education.
Yet you remained humble and kind in every sphere of life, and you will be sorely missed not only by your family, but by all who had the good fortune to interact with you.
Richard, Paula, Michelle and Micheal, we all grieve with you in your sad loss, and remember Roseanne for the truly wonderful person she was.
Gerry Garland
January 14, 2026
Hi Michelle and Paula - Kavita and I were saddened to hear the news and our condolences to you and your family. It’s a blessing that you’ll were able to spend the last few days with your Mom. I have such fond memories of her and it was always fun to listen to her African and travel adventures. She was a very accomplished woman and Kavi and I always say that both the girls have got the same drive like their mother. Richard and Roseanne made me feel at home in Durban . My prayers and love to all of you and wishing y’all strength.
January 14, 2026
Dear Richard and family,
Not only did Professor Diab exemplify what it truly meant to excel in research, she also had an innate gift for mentoring and supervising others in a way that made us feel seen, supported, and capable of more than we ever imagined. She inspired us not simply to succeed, but to believe in ourselves and to strive for excellence in whatever we pursued. Now, as a supervisor and mentor myself, I can only hope to be half the supervisor she was to me. I will forever be grateful for the kindness, unconditional support, and profound inspiration that Roseanne brought into my life.
With love and appreciation,
Tirusha Thambiran
Not only did Professor Diab exemplify what it truly meant to excel in research, she also had an innate gift for mentoring and supervising others in a way that made us feel seen, supported, and capable of more than we ever imagined. She inspired us not simply to succeed, but to believe in ourselves and to strive for excellence in whatever we pursued. Now, as a supervisor and mentor myself, I can only hope to be half the supervisor she was to me. I will forever be grateful for the kindness, unconditional support, and profound inspiration that Roseanne brought into my life.
With love and appreciation,
Tirusha Thambiran
January 14, 2026
Dear lovely family
We are joining so many others in honouring your precious mom, wife, gran and friend. Thank you for streaming the memorial so we could be with you in heart and prayers.
As Kirsten: I am so thankful to have experienced Rosanne as a Professor and wise leader, who led with warmth and kindness. Such an inspiration to many - in both leadership and academics. I always knew Prof Diab as an inspiration, but to see the depth and extent of her valuable work in the science community and beyond has been further inspiring. Roseanne's humility and focus on those in front of her kept me from understanding what is now a wonderful legacy.
To excel in academia and policy, as well as being wonderful wife, mom and friend, is normally thought to be impossible. Yet here we are acknowledging Roseanne's beautiful impact in all of the above.
So much love as you learn to navigate your world's without Roseanne - and praying for your wonderful memories of her to keep inspiring you and bringing some comfort in the midst of grief.
Sending you all much love from all of us and praying for depths of peace in this very sad time
Sue, Kirst and Lindi
We are joining so many others in honouring your precious mom, wife, gran and friend. Thank you for streaming the memorial so we could be with you in heart and prayers.
As Kirsten: I am so thankful to have experienced Rosanne as a Professor and wise leader, who led with warmth and kindness. Such an inspiration to many - in both leadership and academics. I always knew Prof Diab as an inspiration, but to see the depth and extent of her valuable work in the science community and beyond has been further inspiring. Roseanne's humility and focus on those in front of her kept me from understanding what is now a wonderful legacy.
To excel in academia and policy, as well as being wonderful wife, mom and friend, is normally thought to be impossible. Yet here we are acknowledging Roseanne's beautiful impact in all of the above.
So much love as you learn to navigate your world's without Roseanne - and praying for your wonderful memories of her to keep inspiring you and bringing some comfort in the midst of grief.
Sending you all much love from all of us and praying for depths of peace in this very sad time
Sue, Kirst and Lindi
January 14, 2026
Dear Roseanne
I was very saddened to know that you, as an internationally well-known scientist filled with great passion to support the development of this world and a great friend, had quietly and peacefully let us.
I have gathered my thoughts in gratitude and quiet respect to remember your distinguished contribution to this world. Your life was devoted to the pursuit of understanding nature and protection of the earth we all love. Your scholarship was marked by rigor and integrity, guided by a belief that truth matters and that truth-driven ideas, when patiently examined, can illuminate the world, as you said to people when you visited us.
Beyond your great publications and various global honors you earned, you will be remembered for the way you demonstrated the role of scholar with humility, curiosity, and an enduring sense of responsibility to us. When you visited my group, my students told me that the conversations with you were so inspiring; questions were welcomed, and disagreements were treated as invitations to think more deeply about policy issues around the world.
You deeply cared about this world. You were concerned about the effects of climate change on water and food security, human health, and biodiversity, as well as the challenges faced by poor and marginalized people living predominantly in developing countries and island states. Every time we met in person or on Zoom, you always talked to me about what we should do to help the world in this area.
Your great legacy has lived in classrooms, libraries, journals, conferences, and in the countless lives you influenced, including international scholars who will carry forward the same commitment to world development as you did. While your absence is keenly felt, your work continues to speak, reminding us that a great life devoted to a better life on this earth will stay in our hearts forever!
I was very saddened to know that you, as an internationally well-known scientist filled with great passion to support the development of this world and a great friend, had quietly and peacefully let us.
I have gathered my thoughts in gratitude and quiet respect to remember your distinguished contribution to this world. Your life was devoted to the pursuit of understanding nature and protection of the earth we all love. Your scholarship was marked by rigor and integrity, guided by a belief that truth matters and that truth-driven ideas, when patiently examined, can illuminate the world, as you said to people when you visited us.
Beyond your great publications and various global honors you earned, you will be remembered for the way you demonstrated the role of scholar with humility, curiosity, and an enduring sense of responsibility to us. When you visited my group, my students told me that the conversations with you were so inspiring; questions were welcomed, and disagreements were treated as invitations to think more deeply about policy issues around the world.
You deeply cared about this world. You were concerned about the effects of climate change on water and food security, human health, and biodiversity, as well as the challenges faced by poor and marginalized people living predominantly in developing countries and island states. Every time we met in person or on Zoom, you always talked to me about what we should do to help the world in this area.
Your great legacy has lived in classrooms, libraries, journals, conferences, and in the countless lives you influenced, including international scholars who will carry forward the same commitment to world development as you did. While your absence is keenly felt, your work continues to speak, reminding us that a great life devoted to a better life on this earth will stay in our hearts forever!
January 13, 2026
Dear Paula, Guy, Brunton and Lauren,
We are so sad to hear about your precious Mom, Gran and wife. We will always remember Roseanne for her warmth, genuine interest in others and her big heart. Our thoughts are with you during this difficult time. Sending lots of love.
We are so sad to hear about your precious Mom, Gran and wife. We will always remember Roseanne for her warmth, genuine interest in others and her big heart. Our thoughts are with you during this difficult time. Sending lots of love.
January 13, 2026
January 13, 2026
TRIBUTE TO THE LATE PROFESSOR ROSEANNE DIAB
ASSAf is a creation of the democratic transition which started in the 1990s. It was not an easy birth, and steady and innovative leadership has been required to bring it to its present flourishing state. One of the major changes was to include all disciplines who always start their work with a question rather than an answer. Another was to regard Membership of the Academy not as a reward for past achievements, but as a challenge to contribute to society with high expertise. To lead such an Academy called for exceptional people, and a very exceptional one of those was the person whose untimely funeral is taking place today, our much-loved Emeritus Professor Roseanne Diab.
Her association with the Academy began when she was an Associate Editor of the South African Journal of Science, after which she became the second Executive Officer for a crucial period of 10 years, from 2008 till 2018. During that time, she did everything she could to strengthen the Academy in its various programmes, reaching out internationally but always seeking synergy between what she did elsewhere and in this country. She was an effective people-builder and diplomat. Most recently, she was the Deputy President of the Academy.
The Academy is aware that many other organisations claim Roseanne as one of their own and best, but this tribute comes from the Academy to which she was fully committed and to which she made a large range of valuable contributions.
On behalf of the current ASSAf President Prof Thokozani Majozi, Members of Council, ASSAf staff, and Colleagues who have engaged with Roseanne, we say, ‘Thank you, Roseanne’ and we will never forget you and your role in our work and our development.
Wieland Gevers [MASSAf], 14 January, 2026
TRIBUTE TO THE LATE PROFESSOR ROSEANNE DIAB
ASSAf is a creation of the democratic transition which started in the 1990s. It was not an easy birth, and steady and innovative leadership has been required to bring it to its present flourishing state. One of the major changes was to include all disciplines who always start their work with a question rather than an answer. Another was to regard Membership of the Academy not as a reward for past achievements, but as a challenge to contribute to society with high expertise. To lead such an Academy called for exceptional people, and a very exceptional one of those was the person whose untimely funeral is taking place today, our much-loved Emeritus Professor Roseanne Diab.
Her association with the Academy began when she was an Associate Editor of the South African Journal of Science, after which she became the second Executive Officer for a crucial period of 10 years, from 2008 till 2018. During that time, she did everything she could to strengthen the Academy in its various programmes, reaching out internationally but always seeking synergy between what she did elsewhere and in this country. She was an effective people-builder and diplomat. Most recently, she was the Deputy President of the Academy.
The Academy is aware that many other organisations claim Roseanne as one of their own and best, but this tribute comes from the Academy to which she was fully committed and to which she made a large range of valuable contributions.
On behalf of the current ASSAf President Prof Thokozani Majozi, Members of Council, ASSAf staff, and Colleagues who have engaged with Roseanne, we say, ‘Thank you, Roseanne’ and we will never forget you and your role in our work and our development.
Wieland Gevers [MASSAf], 14 January, 2026
January 13, 2026
Prof. Diab was an outstanding scientist, a visionary leader, and a passionate advocate for the role of science in addressing societal challenges. Her contribution to science, science diplomacy, and evidence-informed policy on the African continent and globally will remain enduring and deeply respected.
UNAS and ASSAf have shared a strong and productive partnership over the years, collaborating on several fronts in science, technology, and policy to address pressing societal challenges. Prof. Diab’s leadership and commitment greatly strengthened these engagements and inspired collective action across our academies.
During this time of profound loss, we stand in solidarity with ASSAf. The entire Fellowship of UNAS mourns with you and joins you in honouring the remarkable life, service, and legacy of Prof. Roseanne Diab.
May her soul rest in eternal peace, and may you find strength and comfort in the legacy she leaves behind.
Yours sincerely,
Prof. Grace B. Kyomuhendo Dr. Christian Acemah
PRESIDENT, UNAS EXECUTIVE SECRETARY, UNAS
UNAS and ASSAf have shared a strong and productive partnership over the years, collaborating on several fronts in science, technology, and policy to address pressing societal challenges. Prof. Diab’s leadership and commitment greatly strengthened these engagements and inspired collective action across our academies.
During this time of profound loss, we stand in solidarity with ASSAf. The entire Fellowship of UNAS mourns with you and joins you in honouring the remarkable life, service, and legacy of Prof. Roseanne Diab.
May her soul rest in eternal peace, and may you find strength and comfort in the legacy she leaves behind.
Yours sincerely,
Prof. Grace B. Kyomuhendo Dr. Christian Acemah
PRESIDENT, UNAS EXECUTIVE SECRETARY, UNAS
January 13, 2026
Dear Michelle,
I was deeply saddened to hear about the passing of your mother. Please know that my thoughts are with you during this painful time, and I hope you can find some comfort in the love and support surrounding you
I keep very fond memories of our time in South Africa, and I will always remember the warmth and generosity of your hospitality when you welcomed us. Those moments remain truly special to me.
My thoughts are with you and your family. I wish you strength, courage, and comfort in the days ahead.
With my sincere sympathy,
Arthur Mariotte (son of Emmanuelle Ribot)
I was deeply saddened to hear about the passing of your mother. Please know that my thoughts are with you during this painful time, and I hope you can find some comfort in the love and support surrounding you
I keep very fond memories of our time in South Africa, and I will always remember the warmth and generosity of your hospitality when you welcomed us. Those moments remain truly special to me.
My thoughts are with you and your family. I wish you strength, courage, and comfort in the days ahead.
With my sincere sympathy,
Arthur Mariotte (son of Emmanuelle Ribot)
January 13, 2026
We remember Roseanne with great respect and deep fondness.
As our colleague and HoD, she built a common vision amongst diverse academics. Our abiding memory of her leadership was her gift for recognising strengths and developing individuals to their full potential.
We too valued her friendship, often managing to combine family recreation with field work in beautiful places. Her quietly suggestive advice on raising kids was always much appreciated.
As our colleague and HoD, she built a common vision amongst diverse academics. Our abiding memory of her leadership was her gift for recognising strengths and developing individuals to their full potential.
We too valued her friendship, often managing to combine family recreation with field work in beautiful places. Her quietly suggestive advice on raising kids was always much appreciated.
January 13, 2026
To the Diab Family,
We were deeply saddened to hear of the passing of Prof. Diab. She touched many lives through her work and her character, and her legacy will live on in all who knew her. Words feel insufficient at a time like this, but please know that you are not alone.
Professor's life was a gift to many, and she will be remembered with respect and affection. May God's love upholds you, may his presence bring you comfort.
Please accept our deepest sympathies.
Yours sincerely
Mr. Simon Modupe - (Audit, Risk and ICT) Chairperson: SACNASP
We were deeply saddened to hear of the passing of Prof. Diab. She touched many lives through her work and her character, and her legacy will live on in all who knew her. Words feel insufficient at a time like this, but please know that you are not alone.
Professor's life was a gift to many, and she will be remembered with respect and affection. May God's love upholds you, may his presence bring you comfort.
Please accept our deepest sympathies.
Yours sincerely
Mr. Simon Modupe - (Audit, Risk and ICT) Chairperson: SACNASP
January 13, 2026
Roseanne was my academic supervisor to a postgraduate level and a remarkable academic - as many, many would attest. However, my most striking memory of her is from Grade 11. A group of us were sitting at Trust House, DGC one evening, making paper roses for the upcoming matric dance. In the circle, chatting away with the girls and outdoing us all with the roses, was Roseanne. The only mom there. Not a lady with nothing else to do - but a busy professor, who made it seem like she had all the time in the world for us and the task at hand. Now, nearly 30 years later, I am the frazzled professor and mom, and when I feel overwhelmed and not sure where I should be and whom I should be focussed on, I often reflect on that moment. What an inspiration she was.
January 13, 2026
Dear Diab Family,
At every encounter I had with Rose, whether at a TMC school function, a dance recital, Lauren’s birthday parties, or in passing, her grace, kindness and endless energy always stood out. She had a remarkable way of remembering little snippets from past conversations in such detail and consistently went out of her way to make people feel truly seen and special.
I may be biased, as Rose and my daughter, Sienna, share the same birthday, but the 11th of the 11th has always felt like a particularly good day to be born. Tenacious, kind, empathetic, loyal and intelligent - qualities I deeply admire and that Rose embodied so naturally.
I will remember Rose with great warmth and respect, and her smiling face, beaming with pride while watching her grandchildren from afar, will be missed at future school events at TMC.
My thoughts are with your family during this difficult time.
With love,
Tina
At every encounter I had with Rose, whether at a TMC school function, a dance recital, Lauren’s birthday parties, or in passing, her grace, kindness and endless energy always stood out. She had a remarkable way of remembering little snippets from past conversations in such detail and consistently went out of her way to make people feel truly seen and special.
I may be biased, as Rose and my daughter, Sienna, share the same birthday, but the 11th of the 11th has always felt like a particularly good day to be born. Tenacious, kind, empathetic, loyal and intelligent - qualities I deeply admire and that Rose embodied so naturally.
I will remember Rose with great warmth and respect, and her smiling face, beaming with pride while watching her grandchildren from afar, will be missed at future school events at TMC.
My thoughts are with your family during this difficult time.
With love,
Tina
January 13, 2026
I never got the opportunity to meet Prof Diab in person but we knew each other. Ours was a relationship formed through team meetings, phone calls and WhatsApp messages however, it was one of my most important relationships. Roseanne saw the potential in me before I saw it myself. She guided me and put me in rooms with people who could propel me forward and for that, I will forever be grateful.
Until we meet again, thank you.
Until we meet again, thank you.
January 13, 2026
Dear Richard, Paula, Michelle, Michael and family
The news of Roseanne’s passing breaks a piece of my heart. In this mad world we have now lost one of the wise, compassionate, brave people we need most. I often thought of Roseanne in my own work situations - her poise, clarity of thought and strength of character were such an inspiration all the way from when I first met her in my UCT days. She accomplished so much professionally, but was 100% dedicated to her family above all. I feel like I have lost a relative. God speed, Roseanne - you are loved by so many, and I know God now holds you in his warm embrace. God bless all her family, and may you find comfort in each other.
With warmest regards
Dave Andersen
The news of Roseanne’s passing breaks a piece of my heart. In this mad world we have now lost one of the wise, compassionate, brave people we need most. I often thought of Roseanne in my own work situations - her poise, clarity of thought and strength of character were such an inspiration all the way from when I first met her in my UCT days. She accomplished so much professionally, but was 100% dedicated to her family above all. I feel like I have lost a relative. God speed, Roseanne - you are loved by so many, and I know God now holds you in his warm embrace. God bless all her family, and may you find comfort in each other.
With warmest regards
Dave Andersen
January 13, 2026
Dear Michelle, Paula, Pete, and dear mr Diab,
Arthur, Valentin Titouan and I were deeply saddened to learn of Roseanne’s passing. Our hearts are with all of you, and I hope you can feel how deeply she was loved and how profoundly her spirit touched those around her.
Roseanne carried a rare light within her—a light made of wisdom, kindness, and calm strength. Her intelligence was remarkable, yet it was her gentleness and compassion that stayed in our memory. I think you could see her goodness in her eyes and in her beautiful, peaceful smile. When I had the opportunities the meet her, she brought a sense of reassurance and clarity, as if everything would be all right and simple.
We hold close a memory from her visit to my small countryside home in France. After a little accident during the night, we found ourselves in the emergency unit of a modest rural hospital. Even in that moment, Roseanne remained serene, almost apologizing for the inconvenience, while I was the one feeling distressed and so embarrased. Her grace, and quiet shone through—she went throuth this with dignity and kindness for everyone around.
Another treasured memory is the Christmas when you welcomed me and my three boys in your house in Durban. We were embraced as family. The kids played with Paula's son and daughter, with you all and the sea and beach in Durban, your pool , the football party, the excellent diners, all became part of memories my boys will carry forever. Roseanne created warmth and made people feel they belonged.
From all what Michelle told me about her mom, Roseanne’s life was guided by purpose. As an extraordinary scientist, she devoted herself to knowledge, truth, and progress, traveling the world to promote science and to open doors for women. She lived with bravery, commitment, and heart, using her gifts in service of something greater than herself.
I truly believe that such a soul does not disappear. Roseanne’s spirit lives on—in her children, in the love she shared with her husband, in the countless minds she inspired, and in the quiet goodness she planted in the world. Her journey continues now in peace, light, and love.
May you feel her presence close to you, especially in moments of silence, sunlight, and shared memories. And may you find comfort in knowing that her life was meaningful, beautiful, and deeply impactful.
With all our love,
Arthur, Valentin, Titouan and Emma
Arthur, Valentin Titouan and I were deeply saddened to learn of Roseanne’s passing. Our hearts are with all of you, and I hope you can feel how deeply she was loved and how profoundly her spirit touched those around her.
Roseanne carried a rare light within her—a light made of wisdom, kindness, and calm strength. Her intelligence was remarkable, yet it was her gentleness and compassion that stayed in our memory. I think you could see her goodness in her eyes and in her beautiful, peaceful smile. When I had the opportunities the meet her, she brought a sense of reassurance and clarity, as if everything would be all right and simple.
We hold close a memory from her visit to my small countryside home in France. After a little accident during the night, we found ourselves in the emergency unit of a modest rural hospital. Even in that moment, Roseanne remained serene, almost apologizing for the inconvenience, while I was the one feeling distressed and so embarrased. Her grace, and quiet shone through—she went throuth this with dignity and kindness for everyone around.
Another treasured memory is the Christmas when you welcomed me and my three boys in your house in Durban. We were embraced as family. The kids played with Paula's son and daughter, with you all and the sea and beach in Durban, your pool , the football party, the excellent diners, all became part of memories my boys will carry forever. Roseanne created warmth and made people feel they belonged.
From all what Michelle told me about her mom, Roseanne’s life was guided by purpose. As an extraordinary scientist, she devoted herself to knowledge, truth, and progress, traveling the world to promote science and to open doors for women. She lived with bravery, commitment, and heart, using her gifts in service of something greater than herself.
I truly believe that such a soul does not disappear. Roseanne’s spirit lives on—in her children, in the love she shared with her husband, in the countless minds she inspired, and in the quiet goodness she planted in the world. Her journey continues now in peace, light, and love.
May you feel her presence close to you, especially in moments of silence, sunlight, and shared memories. And may you find comfort in knowing that her life was meaningful, beautiful, and deeply impactful.
With all our love,
Arthur, Valentin, Titouan and Emma
January 12, 2026
How did Rose become the respected researcher, professor, colleague, amazing wife, mother and grandmother we all know?
Roseanne Denise (Denise, named after our father, Denis) was born on the 11th of November 1949, a post war Baby Boomer. She was born curious and alert. Her father tells the story of sleepless nights when he was up playing with her and her toys. She walked early and explored her world relentlessly. After travelling to Town on the bus with her mom, Bev would be in the pram and Rose would be restrained on a walking leash (a child harness with a rein).
Rose developed a love of gardening and gardens and this love was sustained throughout her life.
“My fondest memories are of spending time in the garden with mom. She was always a very keen gardener, and I would potter around next to her and very early on learned the names of all the flowers – columbines, nasturtiums, hollyhocks, anemones, begonias, pansies, zinnias and so on. “
Rose remembers the freedom of a 50s childhood: “When I think back to those days in Durban North, I recall considerable freedom. We played with other children in the street and were in and out of each other’s houses.” Across the road lived the warm, caring Knowles family. Norma, Lynne and Trish became life-long friends. It was a childhood of climbing trees, riding bikes, hula hoops and marbles; ballet, ice skating, baking and singing and dancing and listening to recordings of Peter and the Wolf.
Rose was not too keen on playing with dolls. She preferred Puzzle Books, General Knowledge games and Board Games. Lynne and Bev were not too keen to play Monopoly with her as she made up her own rules and, being older, was too quick and always determined to win.
She was a terrible tease and delighted in chasing Bev around the house so she could put flying ants down the back of Bev’s dress. The children collected shells and butterflies and stones.
Rose was always the leader, the boss and the organiser of games and adventures. “We came home late in the afternoon from a trip to the valley. Mom must have been very worried for our safety, as she locked us up in separate rooms as punishment.” Mom did not know that Rose had led the expedition into the large water main pipes. Nor about the leaping and jumping off the very high earthworks and towering piles of sand when Northlands Old Boys Club, was being built.
Rose loved going to ‘work’ with her Dad on Saturday mornings. She enjoyed the picnics, excursions to Durban’s beaches and the annual holidays in the Drakensberg. She loved the opportunity to go horse riding.
Her most favourite person in the world was her maternal grandfather, Walter Richard Price, whom she called Gay, as he was such a fun and interesting person who also enjoyed exploring. At around age 11:
“I learned that my friend Priscilla was selling her old farm horse for 25 Pounds. I planned to buy it and stable it in the valley near Old Mill Way where it could find free grazing. I shared this secret with Gay and he offered to help me pay the shortfall from my pocket money contribution (probably around 24 Pounds). I was so excited about this secret – my own horse and it wouldn’t cost anything to stable. I lived this dream for some time until it all came crashing down as my parents brought me to my senses.”
During High School, Rose was quietly rebelling. Although she had an Honours Blazer and was a Prefect, her full potential was not realised. There was no Science offered as a subject at Northlands Girls. Although the library had a rich collection of Literature, the non-fiction books were more general and a bit out of date. There was no Internet, and the main reference resource was the Encyclopaedia Britannica
The world opened up a bit when she went to University. There she had a political awakening as she was in the midst of the turbulent apartheid South Africa. She had mostly brilliant lecturers for her BSc courses. She also enjoyed the practicals and the field trips. Being in a mostly male environment, she developed a toughness and a determination to succeed.
Rose did an honours Degree in Wind Energy and years later, was chuffed to find out that the original 12th Century family farm in East Lothian, Scotland, still exists today and the current farmers have invested in Wind Energy! How awesome is that!
Rose was an adventurer and was determined to explore the world. She paid back a student loan and set of for London at the end of 1971. Her stories make for a riveting read.
(A note about her stories: Paula and I were asked to review some of the early ones. We were very honest. They were very boring and read like a scientific paper. With no tact, we persuaded her to put the meeting details at the top of the story and then tell us about the people and places and do a lessons learned or review at the end. The stories are now funny, poignant, heartfelt and very interesting.)
Rose had a great deal of resilience and worked at many boring, lowly paid jobs to make money to travel. At that time, South Africans were not granted Work Visas, so she had an agent who arranged the jobs. She travelled extensively on the Continent and up into Scandinavia, often with a friend. They slept in parks, hitched rides and explored towns and cities.
There were no GPS devices, no cell phones, no Internet and often no maps. Rose had a well-developed inner-GPS. As a child she used to practise finding her way around department stores and roads in our suburb by imagining the layout. Many a time when she was travelling, she had to remember where the student digs or hotel was by imagining and remembering her foot print.
Rose was curious about the places she visited and basked in the wonders of the world.
Rose was always humble about her achievements. This story, although it doesn’t fit into the timeline of her youth, deserves to be told. This was in 2017, just before the Covid-19 Pandemic:
“I have had the good fortune to stay at two stately country houses – Wiston House in Sussex and Chicheley Hall in Buckinghamshire. The first was as South Africa’s representative on an Organisation for Economic Cooperation and Development (OECD) expert panel on disaster planning and the second was for a meeting of the committee tasked with the review of the Intergovernmental Panel on Climate Change (IPCC).
The purpose of the OECD meeting that I was attending was to develop an improved understanding of national mechanisms for obtaining science advice in times of major international c
Roseanne Denise (Denise, named after our father, Denis) was born on the 11th of November 1949, a post war Baby Boomer. She was born curious and alert. Her father tells the story of sleepless nights when he was up playing with her and her toys. She walked early and explored her world relentlessly. After travelling to Town on the bus with her mom, Bev would be in the pram and Rose would be restrained on a walking leash (a child harness with a rein).
Rose developed a love of gardening and gardens and this love was sustained throughout her life.
“My fondest memories are of spending time in the garden with mom. She was always a very keen gardener, and I would potter around next to her and very early on learned the names of all the flowers – columbines, nasturtiums, hollyhocks, anemones, begonias, pansies, zinnias and so on. “
Rose remembers the freedom of a 50s childhood: “When I think back to those days in Durban North, I recall considerable freedom. We played with other children in the street and were in and out of each other’s houses.” Across the road lived the warm, caring Knowles family. Norma, Lynne and Trish became life-long friends. It was a childhood of climbing trees, riding bikes, hula hoops and marbles; ballet, ice skating, baking and singing and dancing and listening to recordings of Peter and the Wolf.
Rose was not too keen on playing with dolls. She preferred Puzzle Books, General Knowledge games and Board Games. Lynne and Bev were not too keen to play Monopoly with her as she made up her own rules and, being older, was too quick and always determined to win.
She was a terrible tease and delighted in chasing Bev around the house so she could put flying ants down the back of Bev’s dress. The children collected shells and butterflies and stones.
Rose was always the leader, the boss and the organiser of games and adventures. “We came home late in the afternoon from a trip to the valley. Mom must have been very worried for our safety, as she locked us up in separate rooms as punishment.” Mom did not know that Rose had led the expedition into the large water main pipes. Nor about the leaping and jumping off the very high earthworks and towering piles of sand when Northlands Old Boys Club, was being built.
Rose loved going to ‘work’ with her Dad on Saturday mornings. She enjoyed the picnics, excursions to Durban’s beaches and the annual holidays in the Drakensberg. She loved the opportunity to go horse riding.
Her most favourite person in the world was her maternal grandfather, Walter Richard Price, whom she called Gay, as he was such a fun and interesting person who also enjoyed exploring. At around age 11:
“I learned that my friend Priscilla was selling her old farm horse for 25 Pounds. I planned to buy it and stable it in the valley near Old Mill Way where it could find free grazing. I shared this secret with Gay and he offered to help me pay the shortfall from my pocket money contribution (probably around 24 Pounds). I was so excited about this secret – my own horse and it wouldn’t cost anything to stable. I lived this dream for some time until it all came crashing down as my parents brought me to my senses.”
During High School, Rose was quietly rebelling. Although she had an Honours Blazer and was a Prefect, her full potential was not realised. There was no Science offered as a subject at Northlands Girls. Although the library had a rich collection of Literature, the non-fiction books were more general and a bit out of date. There was no Internet, and the main reference resource was the Encyclopaedia Britannica
The world opened up a bit when she went to University. There she had a political awakening as she was in the midst of the turbulent apartheid South Africa. She had mostly brilliant lecturers for her BSc courses. She also enjoyed the practicals and the field trips. Being in a mostly male environment, she developed a toughness and a determination to succeed.
Rose did an honours Degree in Wind Energy and years later, was chuffed to find out that the original 12th Century family farm in East Lothian, Scotland, still exists today and the current farmers have invested in Wind Energy! How awesome is that!
Rose was an adventurer and was determined to explore the world. She paid back a student loan and set of for London at the end of 1971. Her stories make for a riveting read.
(A note about her stories: Paula and I were asked to review some of the early ones. We were very honest. They were very boring and read like a scientific paper. With no tact, we persuaded her to put the meeting details at the top of the story and then tell us about the people and places and do a lessons learned or review at the end. The stories are now funny, poignant, heartfelt and very interesting.)
Rose had a great deal of resilience and worked at many boring, lowly paid jobs to make money to travel. At that time, South Africans were not granted Work Visas, so she had an agent who arranged the jobs. She travelled extensively on the Continent and up into Scandinavia, often with a friend. They slept in parks, hitched rides and explored towns and cities.
There were no GPS devices, no cell phones, no Internet and often no maps. Rose had a well-developed inner-GPS. As a child she used to practise finding her way around department stores and roads in our suburb by imagining the layout. Many a time when she was travelling, she had to remember where the student digs or hotel was by imagining and remembering her foot print.
Rose was curious about the places she visited and basked in the wonders of the world.
Rose was always humble about her achievements. This story, although it doesn’t fit into the timeline of her youth, deserves to be told. This was in 2017, just before the Covid-19 Pandemic:
“I have had the good fortune to stay at two stately country houses – Wiston House in Sussex and Chicheley Hall in Buckinghamshire. The first was as South Africa’s representative on an Organisation for Economic Cooperation and Development (OECD) expert panel on disaster planning and the second was for a meeting of the committee tasked with the review of the Intergovernmental Panel on Climate Change (IPCC).
The purpose of the OECD meeting that I was attending was to develop an improved understanding of national mechanisms for obtaining science advice in times of major international c
January 12, 2026
To the Diab Family,
Condolences on the Passing of Prof Rosanne Diab.
On behalf of the Council, and Management of the South African Council for Natural Scientific Professions (SACNASP), I wish to convey our deepest condolences to the family on the passing of Prof Rosanne Diab.
Prof Diab served SACNASP with great distinction, dedication, and professionalism. Her contribution to the work of the Council and to the advancement of the natural sciences profession in South Africa will be remembered with deep respect and gratitude.
We recognise that this is a time of profound loss for the family. Please accept our heartfelt sympathies and our sincere wishes for strength, comfort, and peace during this difficult period.
May Prof Diab’s legacy of service, integrity, and commitment continue to inspire those who had the privilege of working with her.
She will be deeply missed and may her soul rest in peace.
Should the family require any support, please do not hesitate to hesitate to the Acting Council Secretary.
Yours sincerely,
Dr Magezi Mabaso (Pr.Sc.Nat.) President, SACNASP Council
Condolences on the Passing of Prof Rosanne Diab.
On behalf of the Council, and Management of the South African Council for Natural Scientific Professions (SACNASP), I wish to convey our deepest condolences to the family on the passing of Prof Rosanne Diab.
Prof Diab served SACNASP with great distinction, dedication, and professionalism. Her contribution to the work of the Council and to the advancement of the natural sciences profession in South Africa will be remembered with deep respect and gratitude.
We recognise that this is a time of profound loss for the family. Please accept our heartfelt sympathies and our sincere wishes for strength, comfort, and peace during this difficult period.
May Prof Diab’s legacy of service, integrity, and commitment continue to inspire those who had the privilege of working with her.
She will be deeply missed and may her soul rest in peace.
Should the family require any support, please do not hesitate to hesitate to the Acting Council Secretary.
Yours sincerely,
Dr Magezi Mabaso (Pr.Sc.Nat.) President, SACNASP Council
January 12, 2026
It is with profound sadness and deep respect that we announce the passing of Professor Roseanne Diab, Vice-President of the Academy of Science of South Africa (ASSAf) and former Executive Officer of the Academy from 2008 to 2018.
Professor Diab’s passing is an immeasurable loss to ASSAf, to the South African and global scientific communities, and to all who had the privilege of knowing and working with her. Her distinguished career, her steadfast commitment to scientific excellence, and her deep sense of service have left an indelible mark on our institution, our country, and the many individuals whose lives she touched.
As we mourn this tremendous loss, we also celebrate Professor Diab’s remarkable life and legacy. She will be remembered for her generosity of spirit, her mentorship of young and matured scientists, and her unwavering dedication to advancing science in the service of society.
Hamba kahle, Professor Diab. Your legacy endures, and your light will continue to guide us.
Professor Diab’s passing is an immeasurable loss to ASSAf, to the South African and global scientific communities, and to all who had the privilege of knowing and working with her. Her distinguished career, her steadfast commitment to scientific excellence, and her deep sense of service have left an indelible mark on our institution, our country, and the many individuals whose lives she touched.
As we mourn this tremendous loss, we also celebrate Professor Diab’s remarkable life and legacy. She will be remembered for her generosity of spirit, her mentorship of young and matured scientists, and her unwavering dedication to advancing science in the service of society.
Hamba kahle, Professor Diab. Your legacy endures, and your light will continue to guide us.
January 12, 2026
Office of the President and CEO - SAMRC
Professor Roseanne Diab was a towering figure in South African science whose life and career were defined by intellectual rigour, integrity, and an unwavering commitment to evidence-based decision-making in service of society. At the time of her passing, South Africa has lost not only an exceptional scientist, but a principled leader, mentor, and advocate for science in the public interest.
Professor Diab made seminal contributions to atmospheric science, air quality management, and environmental governance, helping to shape how South Africa understands and responds to pollution and environmental risk. Her work bridged disciplines and sectors, translating complex science into policy-relevant insights that informed national legislation, standards, and regulatory frameworks. She played a critical role in strengthening the interface between science and policy, ensuring that environmental and health considerations were grounded in credible, independent research.
Prof Diab worked closely with the SAMRC in the Climate Change and Health Research Programme within the Environment and Health Research Unit on projects as well as mentoring of staff. Beyond her scientific achievements, Professor Diab was widely respected for her leadership. She served the scientific community with distinction through senior roles in at the University of KwaZulu-Natal and the Academy of Science of South Africa, where she championed ethical science, institutional accountability, and excellence. She was deeply committed to capacity building, mentoring generations of scientists, particularly women,
and fostering inclusive, collaborative research cultures.
Her impact extended far beyond publications and positions held. Colleagues remember her as thoughtful, forthright, and deeply principled, with a calm authority that commanded respect. She exemplified what it means to be a public scientist: courageous,
independent, and steadfast in the pursuit of truth.
Professor Roseanne Diab’s legacy endures in the institutions she strengthened, the policies she shaped, and the many lives she influenced.
She will be remembered with profound respect and gratitude.
Kind regards,
Professor Ntobeko Ntusi
PRESIDENT AND CEO OF THE SOUTH AFRICAN MEDICAL RESEARCH COUNCIL
Professor Roseanne Diab was a towering figure in South African science whose life and career were defined by intellectual rigour, integrity, and an unwavering commitment to evidence-based decision-making in service of society. At the time of her passing, South Africa has lost not only an exceptional scientist, but a principled leader, mentor, and advocate for science in the public interest.
Professor Diab made seminal contributions to atmospheric science, air quality management, and environmental governance, helping to shape how South Africa understands and responds to pollution and environmental risk. Her work bridged disciplines and sectors, translating complex science into policy-relevant insights that informed national legislation, standards, and regulatory frameworks. She played a critical role in strengthening the interface between science and policy, ensuring that environmental and health considerations were grounded in credible, independent research.
Prof Diab worked closely with the SAMRC in the Climate Change and Health Research Programme within the Environment and Health Research Unit on projects as well as mentoring of staff. Beyond her scientific achievements, Professor Diab was widely respected for her leadership. She served the scientific community with distinction through senior roles in at the University of KwaZulu-Natal and the Academy of Science of South Africa, where she championed ethical science, institutional accountability, and excellence. She was deeply committed to capacity building, mentoring generations of scientists, particularly women,
and fostering inclusive, collaborative research cultures.
Her impact extended far beyond publications and positions held. Colleagues remember her as thoughtful, forthright, and deeply principled, with a calm authority that commanded respect. She exemplified what it means to be a public scientist: courageous,
independent, and steadfast in the pursuit of truth.
Professor Roseanne Diab’s legacy endures in the institutions she strengthened, the policies she shaped, and the many lives she influenced.
She will be remembered with profound respect and gratitude.
Kind regards,
Professor Ntobeko Ntusi
PRESIDENT AND CEO OF THE SOUTH AFRICAN MEDICAL RESEARCH COUNCIL
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