Pathways of shelf water export from the Hatteras shelf and slope


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dc.contributor.author Churchill, James H.
dc.contributor.author Gawarkiewicz, Glen G.
dc.date.accessioned 2012-10-11T20:04:20Z
dc.date.available 2013-02-21T09:45:06Z
dc.date.issued 2012-08-21
dc.identifier.citation Journal of Geophysical Research 117 (2012): C08023 en_US
dc.identifier.uri http://hdl.handle.net/1912/5440
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): C08023, doi:10.1029/2012JC007995. en_US
dc.description.abstract It has long been recognized that a massive flow of Middle Atlantic Bight (MAB) shelf water is exported to the deep ocean in the region near Cape Hatteras, North Carolina. We examine the details of this export using data from an extensive array of 26 moorings, deployed over the shelf and slope between Cape Hatteras and the Chesapeake Bay mouth (from 35° 27′ to 36° 40′ N) as part of the U.S. Department of Energy's Ocean Margins Program. Our analysis indicates that the flow of the MAB shelf-edge frontal jet, which typically extends over the MAB slope, falls victim to export over the length of the mooring array, essentially vanishing by the southern extreme of the array. By contrast, the flow of MAB shelf water entering the study region over the inner and middle shelf (to roughly the 40-m isobath) tends to experience very little loss over the extent of the OMP array. Based on our findings and those of previous studies, we hypothesize that this inner and middle shelf flow is diverted seaward upon encountering the Hatteras Front, which separates MAB and South Atlantic Bight shelf waters. Some fraction of this flow appears to return to the OMP array, moving northeastward over the upper slope en route to the deep ocean. Our analysis also suggests that the export of MAB shelf water is enhanced as the Gulf Stream approaches the shelf-edge near Diamond Shoals, a process we deem to be a high priority for future study. en_US
dc.description.sponsorship The Ocean Margins Program was funded by the U.S. Department of Energy through various grants. Our analysis was supported by a grant (OCE-0926999) from the National Science Foundation. 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/10.1029/2012JC007995
dc.subject Gulf Stream shelf water interaction en_US
dc.subject Hatteras Shelf en_US
dc.subject Shelf water export en_US
dc.title Pathways of shelf water export from the Hatteras shelf and slope en_US
dc.type Article en_US
dc.description.embargo 2013-02-21 en_US
dc.identifier.doi 10.1029/2012JC007995

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