Nzimande Mourns the Passing of Esteemed Scientist Professor Roseanne Diab at 76
The South African scientific community is in mourning following the death of Professor Roseanne Diab, a trailblazing atmospheric scientist and dedicated advocate for gender equality in STEM fields. Minister of Science, Technology, and Innovation, Professor Blade Nzimande, has shared his deep sadness over the loss, describing Diab as one of the nation’s most outstanding figures in research and policy. Diab, who was 76, passed away peacefully on the evening of Saturday, 10 January 2026, after a brave fight against kidney cancer diagnosed late last year. Her contributions to air quality studies, climate change research, and inclusive education have left a lasting mark on South Africa and beyond.
This loss comes at a time when the country is pushing for stronger innovation and environmental policies, areas where Diab played a key role. As tributes pour in from colleagues, students, and institutions, her story reminds us of the vital work done by women in science amid ongoing challenges like gender gaps and health crises. With her funeral set for tomorrow, many are reflecting on a career that boosted South Africa’s global standing in scientific fields, inspiring the next generation to carry on her work.
Minister Nzimande’s Heartfelt Tribute
Minister Blade Nzimande has led the national response, expressing profound sorrow on behalf of the Department of Science, Technology, and Innovation and the entire National System of Innovation. In his statement, he hailed Diab as “one of South Africa’s most distinguished scientists, who served the country in various capacities.”
Nzimande highlighted her long service at the Academy of Science of South Africa (ASSAf), where she was Executive Officer from 2008 to 2018 and later Vice-President. “Throughout her long tenure at the ASSAf and other national scientific and academic organisations, the late Professor played a crucial role in enhancing the quality of research in the country, thereby strengthening South Africa’s science, technology, and innovation policies,” he said.
He also praised her as a mentor and leader who shaped policies in emerging technologies, environmental sustainability, and equity in higher education. “Professor Diab’s passing constitutes an incalculable loss for our South Africa’s scientific and academic communities,” Nzimande added, sending condolences to her family, friends, and colleagues. “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.”
A Distinguished Career in Science and Academia
Born on 11 November 1949, Professor Roseanne Diab built a remarkable career as an atmospheric scientist, focusing on air quality, tropospheric ozone, dispersion modeling, and climate change. She became an Emeritus Professor in the School of Environmental Sciences at the University of KwaZulu-Natal (UKZN), where she spent much of her professional life as a scholar, mentor, and academic leader.
Diab’s early work laid the groundwork for understanding pollution and its effects on the environment, earning her recognition both locally and internationally. She authored numerous papers and contributed to global reports on atmospheric science, helping shape responses to climate challenges in southern Africa. Her expertise extended to practical applications, such as advising on policies to reduce emissions and improve urban air quality.
Beyond research, Diab was a key figure in building institutions. As ASSAf’s Executive Officer for a decade, she guided the academy through growth, promoting evidence-based advice to government and fostering collaborations. Even after stepping down in 2019, she remained active as Vice-President, influencing strategies on innovation and sustainability.
Championing Gender Equality in STEM
One of Diab’s most enduring legacies is her fight for gender equality in science, technology, engineering, and mathematics (STEM). She was a vocal advocate, working to break down barriers that hold women back in these fields. As Director of GenderInSITE, an international initiative, she led efforts to promote women’s roles in science for sustainable development.
Diab also chaired The World Academy of Sciences’ (TWAS) Gender Advisory Committee, pushing for inclusive policies worldwide. Closer to home, she served on the South African Council for Natural Scientific Professions (SACNASP) and chaired its Strategic Projects Committee since 2019. Her work here focused on professional standards and equity, ensuring more diverse voices in natural sciences.
Through workshops, reports, and mentorship, Diab inspired countless women and girls to pursue STEM careers. Her efforts aligned with national goals to close gender gaps, where women still make up less than 30% of researchers in some fields. Colleagues remember her as a role model who combined sharp intellect with kindness, often guiding young scientists through tough times.
Battle with Illness and Final Days
Diab’s daughter, Dr Paula Diab Bigalke, shared the sad news of her mother’s passing, noting she died peacefully at home surrounded by loved ones. Diagnosed with kidney cancer towards the end of 2025, Diab faced the illness with the same determination that defined her career. Despite the odds, she continued to engage with her work and community until her health declined.
Kidney cancer, which affects thousands in South Africa each year, often goes undetected until advanced stages. Diab’s fight highlights the need for better awareness and research into such diseases, areas she might have championed had time allowed. Her family and friends have spoken of her grace and positivity, even in her final months, as she reflected on a life well-lived.
Tributes from ASSAf and the Scientific Community
The Academy of Science of South Africa echoed the Minister’s sentiments, calling Diab’s death “an immeasurable loss to the academy, the South African community, global scientific communities, and all those who had the privilege of knowing and working with her.” In their statement, ASSAf praised her “distinguished career, her steadfast commitment to scientific excellence, and her deep sense of service,” which left a lasting impact on the institution and the nation.
Wider tributes have come from universities, research bodies, and international partners. UKZN, where she spent decades, remembered her as a pioneer in environmental sciences who mentored generations of students. Globally, groups like TWAS noted her role in advancing science in developing countries, especially for women and underrepresented groups.
Her passing has sparked calls for more funding in climate research and gender initiatives, ensuring her vision lives on. Many have shared stories of her warmth, like how she made complex topics accessible and encouraged teamwork in tough projects.
Funeral Arrangements and Final Farewell
Professor Diab’s funeral service will be held tomorrow, Wednesday, 14 January 2026, at the Our Lady of Mercy Catholic Church in Kloof, Durban. The ceremony is expected to draw family, friends, colleagues, and dignitaries to celebrate her life and contributions. Details on attendance or live streaming have not been shared, but it will likely be a moment of reflection and honour.
In lieu of flowers, the family may suggest donations to causes close to her heart, such as STEM education for girls or cancer research, though no specifics have been announced yet.
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