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How a molecule can change the climate

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Clouds are formed from water droplets that form in the atmosphere around fine particles called aerosols. Air pollutants contribute significantly to the formation of these aerosols. A team from the l’Institut de physique des 2 infinis de Lyon (IP2I ‒ Université Claude Bernard Lyon 1 / CNRS), in collaboration with laboratories in Grenoble, Austria and Japan, has just discovered a process that was completely unknown until now : the first steps in the formation of atmospheric aerosols are promoted by the presence of pyridine. This molecule produced in abundance by human activity thus influences the formation of clouds and therefore the climate.

This work is published on 21 October 2019 in the journal PNAS.
For more information, see the fullPress release of Claude Bernard Lyon 1 University and the CNRS (in French).

*Research structures involved : Institut de physique des 2 infinis de Lyon (IP2I ‒ Université Lyon 1 / CNRS), Laboratoire interdisciplinaire de physique (LIPhy ‒ Université Grenoble Alpes / CNRS), Institut für Lonenphysik und Angewandte Physik (Université d’Innsbruck, Autriche), Atomic, Molecular & Optics Physics Laboratory (RIKEN, Japon), l’International research laboratory FJPPL-TYL (CNRS/CEA/KEK)

Voir en ligne : Impact of a hydrophobic ion on the early stage of atmospheric aerosol formation.Linda Feketeová, Paul Bertier, Thibaud Salbaing, Toshiyuki Azuma, Florent Calvo, Bernadette Farizon, Michel Farizon, and Tilmann D. Märk.,Proc. Natl. Acad. Sci. 2019