Article (Scientific journals)
Implications of Refined Altimetry on Estimates of Mesoscale Activity and Eddy-Driven Offshore Transport in the Eastern Boundary Upwelling Systems
Capet, Arthur; Mason, Evan; Rossi, Vincent et al.
2014In Geophysical Research Letters, 41
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Keywords :
Eastern Boundary Upwelling Systems; Mesoscale; Altimetry
Abstract :
[en] We investigate the extent to which the recently upgraded version of the Ssalto/Duacs sea level anomaly product affects the description of mesoscale activity in the Eastern Boundary Upwelling Systems (EBUS). Drifter observations confirm that the new data set released by Archiving, Validation and Interpretation of Satellite Oceanographic data (AVISO) in April 2014 (DT14) offers an enhanced description of mesoscale activity for the four EBUS. DT14 returns significantly higher eddy kinetic energy levels (+80%) within a 300 km coastal band, where mesoscale structures are known to induce important lateral physical and biogeochemical fluxes. When applied to DT14, an automatic eddy detection algorithm detects more eddies in the EBUS (+37%), and lower eddy radius estimates, in comparison with results using the former altimetry product (DT10). We show that despite higher eddy densities, the smaller eddy radii result in westward eddy transport estimates that are smaller than those obtained from DT10 ( −12%).
Disciplines :
Earth sciences & physical geography
Author, co-author :
Capet, Arthur  ;  Université de Liège > Département de Biologie, Ecologie et Evolution > MAST (Modeling for Aquatic Systems)
Mason, Evan;  Mediterranean Institute for Advanced Studies (IMEDEA) > Department of Marine Technologies, Operational Oceanography and Sustainability
Rossi, Vincent;  University of the Balearic Islands > Institute for Cross-Disciplinary Physics and Complex Systems (IFISC)
Troupin, Charles;  Balearic Islands Coastal Observing and Forecasting System
Faugere, Yannice;  Collecte Localisation Satellites
Pujol;  Collecte Localisation Satellites
Pascual, Ananda;  Mediterranean Institute for Advanced Studies (IMEDEA)
Language :
English
Title :
Implications of Refined Altimetry on Estimates of Mesoscale Activity and Eddy-Driven Offshore Transport in the Eastern Boundary Upwelling Systems
Publication date :
October 2014
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
Volume :
41
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
FP7 - 283367 - MYOCEAN2 - Prototype Operational Continuity for the GMES Ocean Monitoring and Forecasting Service
Funders :
CE - Commission Européenne [BE]
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