Abstract's details

Coastally trapped intra-seasonal waves along African coasts: an attempt to estimate their thermal impacts

Alban Lazar (LOCEAN-IPSL-UPMC, France)

Sane Badara (LPAOSF-ESP-UCAD, Senegal); Malick Wade (LSAO, UGB, Senegal); Léa Poli (LOCEAN-IPSL-UPMC, France)

Event: 2018 Ocean Surface Topography Science Team Meeting

Session: Others (poster only)

Presentation type: Poster

Coastally trapped waves (CTW) circulate along African coasts of the Atlantic at several frequencies, and their intra-seasonal activity has been fairly well documented. Understanding their thermal impact and importance for the intra-seasonal SST variability still requires a quantitative systematic analysis, as well as in-situ continuous measurements. Through the analysis of composites of remotely sensed CTW reaching the main coastal upwelling fronts of Senegal-Mauritania and Angola-Benguela, we evidence a striking phasing of wind and CTW propagating events that prevent to easily deconvolute local and remote forcing of SST. We also present an analysis of a coastal buoy measurements in the Senegalese upwelling front, that allows to reveal CTW impacts over the vertical stratification in this region.

Corresponding author:

Alban Lazar

LOCEAN-IPSL-UPMC

France

alban.lazar@upmc.fr

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