Atmospheric Response to SST in the Eastern Tropical Atlantic in July-August

Dahirou Wane (1) , Gaëlle de Coëtlogon (2) , Alban Lazar (3) , Malick Wade (4) , Amadou Thierno Gaye (1)

1 LPAO-SF - Laboratoire de Physique de l'Atmosphère et de l'Océan Siméon Fongang
2 TROPO - LATMOS
3 VARCLIM - Océan et variabilité du climat
4 LSAO - Université Gaston Berger - Laboratoire des Sciences de l’Atmosphère et des Océans [Sénégal]

The sea surface temperature (SST) in the Eastern Tropical Atlantic is characterized by a strong seasonal cycle. The SST becomes very warm in boreal summer in the north, off Senegal / Mauritania, while a seasonal cold tongue takes place in the south, around the Equator. Along the zonally-extended SST maximum, the Intertropical Convergence Zone (ITCZ) corresponds to a region of surface wind convergence and intense precipitation. The aim of this study is to document the SST control on the seasonal evolution of the ITCZ latitude with a regional atmospheric model (WRF), by manually removing any SST warming (« Frozen North ») or cooling (« Frozen South ») from June in the eastern Tropical Atlantic

Domaines: Climatologie

Dahirou Wane, Gaëlle de Coëtlogon, Alban Lazar, Malick Wade, Amadou Thierno Gaye. Atmospheric Response to SST in the Eastern Tropical Atlantic in July-August. EGU General Assembly 2021, Apr 2021, Online, Unknown Region. ⟨insu-04496717⟩