Vous êtes ici : Accueil / Agenda / 19/3/2020: Séminaire de Marion Saint-Lu (LMD)

19/3/2020: Séminaire de Marion Saint-Lu (LMD)

Rainfall changes over tropical rainforests under global warming: On the role of surface warming and atmospheric circulation.
Quand ? Le 19/03/2020,
de 11:00 à 12:00
Où ? Salle de réunion du LMD (T45-55, 3e étage)
S'adresser à
Téléphone 0144272799
Ajouter un événement au calendrier vCal
iCal

This study investigates how the direct effects of CO2 quadrupling on plant physiology impact precipitation in three main rainforests. We show that differences between the regions lie in how land-surface warming (driven by reduced transpiration) interacts with their climatological atmospheric circulations, regardless of their reliance on evapotranspiration. Various atmosphere-only experiments from two General Circulation Models are used. We find that over New Guinea, land-surface warming amplifies moisture convergence from the ocean and increases rainfall. In the Congo, no clear rainfall changes emerge as the land-surface warming effect is offset by migrations of rainfall. In Amazonia, the interaction of land-surface warming with the climatological circulation pattern leads to a precipitation-change dipole, with reduced rainfall in central and eastern Amazonia and increased rainfall in the west.

« Juillet 2020 »
Juillet
DiLuMaMeJeVeSa
1234
567891011
12131415161718
19202122232425
262728293031