The evolution of African monsoons and its impacts on precipitation seasonality in the late Cenozoic and future climate change
Domaine:
climateType de record:
paper
Créateur:
FraDanMicJef
Éditeur:
Hôte:
The West African Monsoon (WAM) strongly drives precipitation variability
and seasonality across continental West Africa and the tropical Eastern
Atlantic. However, the evolution of the WAM in the late Cenozoic, in
response to changes in vegetation, atmospheric CO ,
orbital forcings, paleogeography, and orography as well as its
teleconnections such as the mean location of the African Easterly Jet
(AEJ), Tropical Easterly Jet (TEJ), SubTropical Jet (STJ),
Inter-Tropical Discontinuity (ITD) and low-level westerly flow is not
well constrained. We contribute to understanding past WAM dynamics by
performing high-resolution, time-specific paleoclimate simulation using
General Circulation Model ECHAM5. We focus our analysis on the migration
and intensification of the WAM and its associated atmospheric
thermodynamic structure which influence the rainfall seasonality and
patterns across the Sahel, Guinea Coast, and Sahara regions.
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