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contributor authorJouanno, Julien
contributor authorOchoa, José
contributor authorPallàs-Sanz, Enric
contributor authorSheinbaum, Julio
contributor authorAndrade-Canto, Fernando
contributor authorCandela, Julio
contributor authorMolines, Jean-Marc
date accessioned2017-06-09T17:22:03Z
date available2017-06-09T17:22:03Z
date copyright2016/11/01
date issued2016
identifier issn0022-3670
identifier otherams-83908.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227185
description abstractelocity data from a mooring array deployed northeast of the Campeche Bank (CB) show the presence of subinertial, high-frequency (below 15 days) velocity fluctuations within the core of the northward flowing Loop Current. These fluctuations are associated with the presence of surface-intensified Loop Current frontal eddies (LCFEs), with cyclonic vorticity and diameter < 100 km. These eddies are well reproduced by a high-resolution numerical simulation of the Gulf of Mexico, and the model analysis suggests that they originate along and north of the CB, their main energy source being the mixed baroclinic?barotropic instability of the northward flow along the shelf break. There is no indication that these high-frequency LCFEs contribute to the LC eddy detachment in contrast to the low-frequency LCFEs (periods > 30 days) that have been linked to Caribbean eddies and the LC separation process. Model results show that wind variability associated with winter cold surges are responsible for the emergence of high-frequency LCFEs in a narrow band of periods (6?10 day) in the region of the CB. The dynamical link between the formation of these LCFEs and the wind variability is not direct: (i) the large-scale wind perturbations generate sea level anomalies on the CB as well as first baroclinic mode, coastally trapped waves in the western Gulf of Mexico; (ii) these waves propagate cyclonically along the coast; and (iii) the interaction of these anomalies with the Loop Current triggers cyclonic vorticity perturbations that grow in intensity as they propagate downstream and develop into cyclonic eddies when they flow north of the Yucatan shelf.
publisherAmerican Meteorological Society
titleLoop Current Frontal Eddies: Formation along the Campeche Bank and Impact of Coastally Trapped Waves
typeJournal Paper
journal volume46
journal issue11
journal titleJournal of Physical Oceanography
identifier doi10.1175/JPO-D-16-0052.1
journal fristpage3339
journal lastpage3363
treeJournal of Physical Oceanography:;2016:;Volume( 046 ):;issue: 011
contenttypeFulltext


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