On differences in satellite wind products and their effects in estimating coastal upwelling processes in the south-east Pacific

Details On differences in satellite wind products and their effects in estimating coastal upwelling processes in the south-east Pacific On differences in satellite wind products and their effects in estimating coastal upwelling processes in the south-east Pacific

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3411608c&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 11, CiteID L11608

Physics

6

Oceanography: General: Upwelling And Convergences (4964), Atmospheric Processes: Instruments And Techniques, Oceanography: General: Coastal Processes

Scientific paper

Alongshore wind stress and curl obtained from ERS and QuikSCAT satellite wind products are routinely used to investigate coastal upwelling dynamics in the south-east Pacific. North of 17°S and south of 26°S there is a good agreement in the seasonal cycle of both products. Data from Peruvian coastal wind stations are used to validate satellite coastal winds. Between 17°S and 26°S seasonal cycles from coastal stations are in phase with QuikSCAT but in opposition with ERS. This discrepancy is confirmed during the overlapping period of the satellite products. Therefore, data from ERS do not seem to capture the strong cross-shore wind gradient in that area, while QuikSCAT renders at least part of it. These differences are dramatically enhanced when computing the wind stress curl along the coast: estimates of Ekman pumping obtained from QuikSCAT data in a coastal band are 2-3 times higher than those achieved with ERS data.

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