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dc.contributor.authorGawarkiewicz, Glen G.
dc.contributor.authorBrink, Kenneth H.
dc.contributor.authorBahr, Frank B.
dc.contributor.authorBeardsley, Robert C.
dc.contributor.authorCaruso, Michael J.
dc.contributor.authorLynch, James F.
dc.contributor.authorChiu, Ching-Sang
dc.date.accessioned2010-06-02T18:18:05Z
dc.date.available2010-06-02T18:18:05Z
dc.date.issued2004-03-04
dc.identifier.citationJournal of Geophysical Research 109 (2004): C03006en_US
dc.identifier.urihttp://hdl.handle.net/1912/3568
dc.descriptionAuthor Posting. © American Geophysical Union, 2004. 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 109 (2004): C03006, doi:10.1029/2002JC001468.en_US
dc.description.abstractIn order to examine spatial and temporal variability of the shelfbreak front during peak stratification, repeated surveys using a towed undulating vehicle (SeaSoar) are used to describe the evolution of shelfbreak frontal structure during 26 July to 1 August 1996 south of New England. Spatial correlation (e-folding) scales for the upper 60 m of the water column were generally between 8 and 15 km for temperature, salinity, and velocity. Temporal correlation scales were about 1 day. The frontal variability was dominated by the passage of a westward propagating meander that had a wavelength of 40 km, a propagation speed of 0.11 m s−1, and an amplitude of 15 km (30 km from crest to trough). Along-front geostrophic velocities (referenced to a shipboard acoustic Doppler current profilers) were as large as 0.45 m s−1, although subject to significant along-front variations. The relative vorticity within the jet was large, with a maximum 0.6 of the local value of the Coriolis parameter. Seaward of the front, a small detached eddy consisting of shelf water was present with a diameter of approximately 15 km. Ageostrophic contributions to the velocity field are estimated to be as large as 0.3 m s−1 in regions of sharp curvature within the meander. These observations strongly suggest that during at least some time periods, shelfbreak exchange is nonlinear (large Rossby number) and dominated by features on a horizontal scale of order 10 km.en_US
dc.description.sponsorshipThis work was performed under grants N-00014-95-1-0575 and N-00014-98-1-0059. as part of the ONR Shelfbreak PRIMER Initiative. Some additional analysis and writing was done under ONR grants N-00014-00-1-0931 and N-00014-01-1-0247.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttp://dx.doi.org/10.1029/2002JC001468
dc.subjectShelfbreak fronten_US
dc.subjectCross-shelf exchangeen_US
dc.subjectFrontal dynamicsen_US
dc.titleA large-amplitude meander of the shelfbreak front during summer south of New England : observations from the Shelfbreak PRIMER experimenten_US
dc.typeArticleen_US


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