FN Archimer Export Format
PT J
TI Origin of fine-scale wind stress curl structures in the Benguela and Canary upwelling systems
BT 
AF DESBIOLLES, Fabien
   BLANKE, Bruno
   BENTAMY, Abderrahim
   GRIMA, Nicolas
AS 1:1,2;2:1,2;3:2;4:1,2;
FF 1:PDG-ODE-LOS;2:;3:PDG-ODE-LOS;4:;
C1 CNRS, UBO, IFREMER, Lab Phys Oceans,IRD,UMR 6523, Brest, France.
   IFREMER, Lab Oceanog Spatiale, Ctr Brest, Brest, France.
C2 CNRS, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-LOS
   PDG-ODE-LPO
IN WOS Ifremer jusqu'en 2018
   copubli-france
TC 20
UR https://archimer.ifremer.fr/doc/00233/34412/32820.pdf
LA English
DT Article
DE ;wind stress;upwelling;SST-wind interactions
AB Numerous studies have shown the primary importance of wind stress curl in coastal upwelling dynamics. The main goal of this new analysis is to describe the QuikSCAT surface wind stress curl at various scales in the Benguela and Canary upwelling systems. The dominant spatial pattern is characterized by cyclonic curl near continental boundaries and anticyclonic curl offshore, in association with equatorward alongshore (upwelling favorable) wind stress. At a smaller scale, we demonstrate the sensitivity of the QuikSCAT wind stress curl to coastal processes related to sea surface temperature (SST) mesoscale fluctuations by presenting a linear relationship between the curl and crosswind SST gradients. Despite the spatial and temporal sensitivity of the underlying thermal coupling coefficient, a local analysis of the fraction of the curl ascribed to SST variability shows that SST is a main driver of the wind stress curl variability and magnitude over the upwelling extension zone (∼100–300 km from the coast) in both the Canary and Benguela systems. Closer to the shore, the curl patterns derived from QuikSCAT observations are only loosely related to SST-wind interactions. As a working hypothesis, they can also be associated with the coastline geometry and orographic effects that are likely to play an important role in local cooling processes.
PY 2014
PD NOV
SO Journal Of Geophysical Research-oceans
SN 0148-0027
PU Amer Geophysical Union
VL 119
IS 11
UT 000346102900033
BP 7931
EP 7948
DI 10.1002/2014JC010015
ID 34412
ER

EF