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dc.contributor.authorFontan, Almudena-
dc.contributor.authorCornuelle, Bruce-
dc.date.accessioned2017-08-23T08:52:10Z-
dc.date.available2017-08-23T08:52:10Z-
dc.date.issued2015-
dc.identifierISI:000354417200033-
dc.identifier.citationJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2015, 120, 2945-2957-
dc.identifier.issn2169-9275-
dc.identifier.urihttp://dspace.azti.es/handle/24689/256-
dc.description.abstractThe short-term (less than 20 days) response of surface circulation to wind has been determined in waters of the southeastern Bay of Biscay, using wind impulse response (time domain) and transfer (frequency domain) functions relating high-frequency radar currents and reanalysis winds. The response of surface currents is amplified at the near-inertial frequency and the low-frequency and it varies spatially. The analysis indicates that the response of the ocean to the wind is slightly anisotropic, likely due to pressure gradients and friction induced by the bottom and coastline boundaries in this region. Thus, the transfer function at the near-inertial frequency decreases onshore due to the coastline inhibition of circularly polarized near-inertial motion. In contrast, the low-frequency transfer function is enhanced toward the coast as a result of the geostrophic balance between the cross-shore pressure gradient and the Coriolis forces. The transfer functions also vary with season. In summer, the current response to wind is expected to be stronger but shallower due to stratification; in winter, the larger mixed layer depth results in a weaker but deeper response. The results obtained are consistent with the theoretical description of wind-driven circulation and can be used to develop a statistical model with a broad range of applications including accurate oceanic forecasting and understanding of the coupled atmosphere-ocean influence on marine ecosystems.-
dc.description.sponsorshipAuthors thank two anonymous reviewers, J. L. Pelegri and the editor D. Barton for their very constructive comments, which have led to an improved version of the manuscript. A. Fontan has been supported by the Research Mobility and Improvement Program of the Department of Education, Language Policy and Culture of the Basque Government. She would like to kindly thank the Scripps Institution of Oceanography and, especially, the Department of Climate, Atmospheric Sciences and Physical Oceanography. This study is partially supported by the Ministry of Economy and Competitiveness through the project CGL2013-45198-C2-2-R and also the Department of Economic Development and Competitiveness of the Basque Government. B. Cornuelle was supported by NOAA grant NA10OAR4320156. The authors thank the Directorate of Emergency Attention and Meteorology of the Basque Government for establishing the HF radar data acquisition system. The original HF radar data can be accessed via the Directorate. We thank Qualitas Remos for the work performed on HF radar data preprocessing. We would like to thank G. Gopalakrishnan for his support in LaTeX. The wind data for this study are from the Research Data Archive (RDA), which is maintained by the Computational and Information Systems Laboratory (CISL) at the National Center for Atmospheric Research (NCAR). NCAR is sponsored by the National Science Foundation (NSF). The original data are available from the RDA (http://dss.ucar.edu) in data sets ds093.1 (CFSR) and ds094.1 (CFSV2). The M\_Map toolbox of Rich Pawlowicz has been used for this contribution. This is contribution 707 of the Marine Research Division of AZTI.-
dc.language.isoeng-
dc.publisherAMER GEOPHYSICAL UNION-
dc.subjectwind-driven circulation-
dc.subjectanisotropic-
dc.subjectwind impulse response function-
dc.subjecttransfer function-
dc.subjecthigh-frequency radar-
dc.subjectBay of Biscay-
dc.subjectSOUTHERN BAY-
dc.subjectOCEAN-
dc.subjectVARIABILITY-
dc.subjectCLIMATE-
dc.subjectPATTERNS-
dc.subjectDRIVEN-
dc.subjectREGION-
dc.subjectMODEL-
dc.titleAnisotropic response of surface circulation to wind forcing, as inferred from high-frequency radar currents in the southeastern Bay of Biscay-
dc.typeArticle-
dc.identifier.journalJOURNAL OF GEOPHYSICAL RESEARCH-OCEANS-
dc.format.page2945-2957-
dc.format.volume120-
dc.contributor.funderResearch Mobility and Improvement Program of the Department of Education, Language Policy and Culture of the Basque Government-
dc.contributor.funderMinistry of Economy and Competitiveness \[CGL2013-45198-C2-2-R]-
dc.contributor.funderDepartment of Economic Development and Competitiveness of the Basque Government-
dc.contributor.funderNOAA \[NA10OAR4320156]-
dc.contributor.funderNational Science Foundation (NSF)-
dc.identifier.e-issn2169-9291-
dc.identifier.doi10.1002/2014JC010671-
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