Atmospheric chemist stuart penkett dies at 87, revolutionized understanding of acid rain and ozone depletion
Stuart Penkett, the atmospheric chemist whose groundbreaking research revealed the chemical processes behind acid rain and significantly contributed to the Montreal Protocol that saved the ozone layer, has died at the age of 87.
Penkett's work transformed environmental science
Born in Eccles, Lancashire, in 1939, Penkett’s career spanned decades of pivotal discoveries. His 1979 paper in Atmospheric Environment definitively identified how sulfur dioxide, primarily from industrial emissions, transforms into sulfuric acid within clouds, leading to the damaging phenomenon of acid rain. The consequences were widespread: devastation to aquatic ecosystems, forests, and infrastructure across Europe and North America throughout the 20th century.
Later, at the University of East Anglia (UEA), Penkett focused on ozone depletion. His measurements were instrumental in pinpointing the role of chlorofluorocarbons (CFCs) and other ozone-depleting substances. This work directly informed the 1987 Montreal Protocol, a landmark international agreement ratified by all UN member states – the first such treaty to achieve universal adoption. Kofi Annan, former UN secretary general, hailed the protocol as “perhaps the single most successful international agreement to date.”
Beyond acid rain and ozone, Penkett’s investigations revealed how the atmosphere naturally breaks down pollutants, effectively cleaning our air. He also highlighted the health risks posed by improperly adjusted domestic gas stoves. His legacy extends to establishing the Weybourne Atmospheric Observatory (WAO) on the Norfolk coast, now part of the World Meteorological Organization’s Global Atmosphere Watch network. He also spearheaded the development of the UK Met Office’s C-130 aircraft into the Facility for Airborne Atmospheric Measurements, a flying laboratory for atmospheric chemistry.
Penkett fostered a national programme for atmospheric chemistry, mentoring a generation of scientists who now hold influential research positions. His dedication extended to hosting international visitors at the WAO, always concluding their visits with a traditional fish-and-chip supper.
He received numerous accolades, including the Haagen-Smit Award in 2003, considered the “Nobel prize” in air quality research, for his seminal work on acid rain formation. His contributions elevated the UEA's school of environmental sciences to a leading research group. He is survived by his wife, Marigold Gibbens, three of their four children, and five grandchildren. His son, Christopher, passed away in 2021.
Stuart Arthur Penkett, a scientist who fundamentally reshaped our understanding of atmospheric chemistry, leaves behind a cleaner planet and a lasting impact on environmental policy.