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Symposium Univ Bordeaux

École d’été internationale "Weak signals and emerging issues in ecological transition" 3-7 juillet 2017


Role of cloud microorganisms in atmospheric processes

by Anne-Marie Delort

10 years ago our group started to study microorganisms present in cloud waters at the Puy de Dôme station. We showed that they were alive and metabolically active because they can resist to atmospheric stresses. This pioneering work opened new scientific questions concerning their potential role in atmospheric chemistry and physics. We showed that microorganisms can act as an alternative route to radical chemistry to transform organic compounds and oxidant species (including hydrogen peroxide and Iron) in clouds. Cloud microorganism can also participate to the formation of droplets by the production of biosurfactants, some others can act as Ice Nuclei thanks to their membrane protein and could thus participate to precipitations. Recent results will be presented.


Ecosystèmes sociétés Transfert Forêts Atmosphère Hydrosystèmes Interactions Agrosystèmes Continuum Impacts Pressions Modélisation Pollution Ecotoxicologie Cycles biogéochimiques Ecologie Adaptation

Group Picture

Field trip - Salles

Field trip - Salles

Cellars

Visiting Bordeaux

Cellars

Dune du Pyla

Boat trip

Evening

Cellars

Boat trip

Visiting Bordeaux

Cellars

Forest trip

Introduction : why a global ecology ?

Field Trip

Tasting

Conference room

Visiting Bordeaux

Dune du Pyla

HAUT