Amphithéâtre Maurice Halbwachs, Site Marcelin Berthelot
Open to all
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Abstract

Ozone is a very minor atmospheric gas that protects life on Earth from the Sun's harmful ultraviolet rays. Its concentration is highest in the ozone layer located between 15 and 35 km above the Earth's surface. The fragile balance of ozone has been endangered by the emission of chlorinated and brominated compounds by the chemical industry, causing the famous hole in the ozone layer. The Montreal Protocol, signed in 1987, regulated the emission of these compounds. The seminar will describe the mechanisms governing the ozone balance and their anthropogenic disruption. It will detail the measures taken to restore the ozone layer and their impact on the climate.

Sophie Godin-Beekmann

Sophie Godin-Beekmann

Sophie Godin-Beekmann is Director of Research at the French National Center for Scientific Research (CNRS). Trained as a physicist, she specializes in the development of lidar instruments for measuring atmospheric parameters. Her research focuses on the evolution of the stratospheric ozone layer and the stratosphere more generally, under the impact of human activities and climate change. She has also coordinated interdisciplinary research projects on the impact of ultraviolet radiation on human health, and on adaptation to environmental change. Author of over one hundred and fifty peer-reviewed publications, she has co-chaired the Lidar working group of the Network for the Detection of Atmospheric Composition Change (NDACC), participated in the international APARC/WCRP program on ozone trends, and contributed to numerous international reports on the state of the ozone layer and stratospheric aerosol balance. She was President of the International Ozone Commission from 2016 to 2024 and has been an honorary member of the International Union of Geodesy and Geophysics since 2015 and of the Academia Europaea since 2019. She was also appointed Director of the Institut Pierre-Simon-Laplace sur les sciences du climat et de l'environnement in January 2024.

Speaker(s)

Sophie Godin-Beekmann

CNRS Research Director

See also

Lecture related to the seminar: Climate change : how do we know what we know ?
François-Marie Bréon, chair Avenir Commun Durable
Climate change : how do we know what we know ?

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