Along-shelf current variability on the Catalan inner-shelf (NW Mediterranean)


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dc.contributor.author Grifoll, Manel
dc.contributor.author Aretxabaleta, Alfredo L.
dc.contributor.author Espino, Manuel
dc.contributor.author Warner, John C.
dc.date.accessioned 2012-11-01T19:59:04Z
dc.date.available 2013-03-22T08:46:04Z
dc.date.issued 2012-09-22
dc.identifier.citation Journal of Geophysical Research 117 (2012): C09027 en_US
dc.identifier.uri http://hdl.handle.net/1912/5504
dc.description Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 117 (2012): C09027, doi:10.1029/2012JC008182. en_US
dc.description.abstract We examine the circulation over the inner-shelf of the Catalan Sea using observations of currents obtained from three Acoustic Doppler Current Profilers (two at 24 m and one at 50 m) during March–April 2011. The along-shelf current fluctuations during that period are mainly controlled by local wind stress on short time scales and by remote pressure gradients on synoptic time scales. Different forcing mechanisms are involved in the along-shelf momentum balance. During storm conditions, wind stress, sea level gradients and the nonlinear terms dominate the balance. During weak wind conditions, the momentum balance is controlled by the pressure gradient, while during periods of moderate wind in the presence of considerable stratification, the balance is established between the Coriolis and wind stress terms. Vertical variations of velocity are affected by the strong observed density gradient. The increased vertical shear is accompanied by the development of stratified conditions due to local heating when the wind is not able to counteract (and break) stratification. The occasional influence of the Besòs River plume is observed in time scales of hours to days in a limited area in near the city of Barcelona. The area affected by the plume depends on the vertical extent of the fresher layer, the fast river discharge peak, and the relaxation of cross-shore velocities after northeast storm events. This contribution provides a first interpretation of the inner-shelf dynamics in the Catalan Sea. en_US
dc.description.sponsorship The research leading to these results has received funding fromthe European Community’s Seventh Framework Programme (FP7/2007/2013) under grant agreement 242284 (Field_ac project). en_US
dc.format.mimetype application/pdf
dc.language.iso en_US en_US
dc.publisher American Geophysical Union en_US
dc.relation.uri http://dx.doi.org/10.1029/2012JC008182
dc.subject Catalan shelf en_US
dc.subject Buoyancy flux en_US
dc.subject Inner-shelf en_US
dc.subject Momentum balance en_US
dc.subject Potential energy balance en_US
dc.subject Stratification en_US
dc.title Along-shelf current variability on the Catalan inner-shelf (NW Mediterranean) en_US
dc.type Article en_US
dc.description.embargo 2013-03-22 en_US
dc.identifier.doi 10.1029/2012JC008182

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