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Summer School "Ecology and Society: Frontiers and Boundaries" / 3 - 7 June 2019

Ecosystems societies Climate change Forests Hydrosystems Atmosphere Biodiversity Agrosystems Pressures Impacts Modelling Pollution Ecotoxicology Biogeochimical cycles Ecology Adaptability
Boat trip
Boat trip
Visiting Bordeaux
Visiting Bordeaux
Round table on global change
Round table on global change
Biogeochemical cycles of disrupted ecosystems
Biogeochemical cycles of disrupted ecosystems
Vineyards
Vineyards
Tasting
Tasting
Field trip - Salles
Field trip - Salles
Group - Crédits photo LabEx COTE
Group - Crédits photo LabEx COTE
Round table Global ecology
Round table Global ecology
Round table - Crédits photo LabEx COTE
Round table - Crédits photo LabEx COTE
Forest trip
Forest trip
Vineyard - Crédits photo LabEx COTE
Vineyard - Crédits photo LabEx COTE
Class room - Crédits photo LabEx COTE
Class room - Crédits photo LabEx COTE
Field trip - Salles
Field trip - Salles
Group 2018 - Crédits photo LabEx COTE
Group 2018 - Crédits photo LabEx COTE
Forests week
Forests week
Fieldtrip Vineyard - Crédits photo LabEx COTE
Fieldtrip Vineyard - Crédits photo LabEx COTE
Forest trip
Forest trip
Visiting Bordeaux
Visiting Bordeaux
Class room - Crédits photo LabEx COTE
Class room - Crédits photo LabEx COTE

Role of cloud microorganisms in atmospheric processes

Last update Monday 20 March 2017

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.