Continuous Flow of Upper Labrador Sea Water around Cape Hatteras
Six velocity sections straddling Cape Hatteras show a deep counterflow rounding the Cape wedged beneath the poleward flowing Gulf Stream and the continental slope. This counterflow is likely the upper part of the equatorward-flowing Deep Western Boundary Current (DWBC). Hydrographic data suggest tha...
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ftcarolinadr:cdr.lib.unc.edu:70795k17r 2023-06-11T04:13:46+02:00 Continuous Flow of Upper Labrador Sea Water around Cape Hatteras Andres, M. Muglia, M. Bahr, F. Bane, J. University of North Carolina at Chapel Hill 2018 https://doi.org/10.17615/5j2z-n246 https://cdr.lib.unc.edu/downloads/g158bt38s?file=thumbnail https://cdr.lib.unc.edu/downloads/g158bt38s English eng Nature Publishing Group https://doi.org/10.17615/5j2z-n246 https://cdr.lib.unc.edu/downloads/g158bt38s?file=thumbnail https://cdr.lib.unc.edu/downloads/g158bt38s http://rightsstatements.org/vocab/InC/1.0/ Scientific Reports, 8(1) Article 2018 ftcarolinadr https://doi.org/10.17615/5j2z-n246 2023-05-28T21:02:56Z Six velocity sections straddling Cape Hatteras show a deep counterflow rounding the Cape wedged beneath the poleward flowing Gulf Stream and the continental slope. This counterflow is likely the upper part of the equatorward-flowing Deep Western Boundary Current (DWBC). Hydrographic data suggest that the equatorward flow sampled by the shipboard 38 kHz ADCP comprises the Upper Labrador Sea Water (ULSW) layer and top of the Classical Labrador Sea Water (CLSW) layer. Continuous DWBC flow around the Cape implied by the closely-spaced velocity sections here is also corroborated by the trajectory of an Argo float. These findings contrast with previous studies based on floats and tracers in which the lightest DWBC constituents did not follow the boundary to cross under the Gulf Stream at Cape Hatteras but were diverted into the interior as the DWBC encountered the Gulf Stream in the crossover region. Additionally, our six quasi-synoptic velocity sections confirm that the Gulf Stream intensified markedly at that time as it approached the separation point and flowed into deeper waters. Downstream increases were observed not only in the poleward transport across the sections but also in the current's maximum speed. Article in Journal/Newspaper Labrador Sea Carolina Digital Repository (UNC - University of North Carolina) Separation Point ENVELOPE(-93.468,-93.468,75.135,75.135) |
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Open Polar |
collection |
Carolina Digital Repository (UNC - University of North Carolina) |
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ftcarolinadr |
language |
English |
description |
Six velocity sections straddling Cape Hatteras show a deep counterflow rounding the Cape wedged beneath the poleward flowing Gulf Stream and the continental slope. This counterflow is likely the upper part of the equatorward-flowing Deep Western Boundary Current (DWBC). Hydrographic data suggest that the equatorward flow sampled by the shipboard 38 kHz ADCP comprises the Upper Labrador Sea Water (ULSW) layer and top of the Classical Labrador Sea Water (CLSW) layer. Continuous DWBC flow around the Cape implied by the closely-spaced velocity sections here is also corroborated by the trajectory of an Argo float. These findings contrast with previous studies based on floats and tracers in which the lightest DWBC constituents did not follow the boundary to cross under the Gulf Stream at Cape Hatteras but were diverted into the interior as the DWBC encountered the Gulf Stream in the crossover region. Additionally, our six quasi-synoptic velocity sections confirm that the Gulf Stream intensified markedly at that time as it approached the separation point and flowed into deeper waters. Downstream increases were observed not only in the poleward transport across the sections but also in the current's maximum speed. |
author2 |
University of North Carolina at Chapel Hill |
format |
Article in Journal/Newspaper |
author |
Andres, M. Muglia, M. Bahr, F. Bane, J. |
spellingShingle |
Andres, M. Muglia, M. Bahr, F. Bane, J. Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
author_facet |
Andres, M. Muglia, M. Bahr, F. Bane, J. |
author_sort |
Andres, M. |
title |
Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
title_short |
Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
title_full |
Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
title_fullStr |
Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
title_full_unstemmed |
Continuous Flow of Upper Labrador Sea Water around Cape Hatteras |
title_sort |
continuous flow of upper labrador sea water around cape hatteras |
publisher |
Nature Publishing Group |
publishDate |
2018 |
url |
https://doi.org/10.17615/5j2z-n246 https://cdr.lib.unc.edu/downloads/g158bt38s?file=thumbnail https://cdr.lib.unc.edu/downloads/g158bt38s |
long_lat |
ENVELOPE(-93.468,-93.468,75.135,75.135) |
geographic |
Separation Point |
geographic_facet |
Separation Point |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_source |
Scientific Reports, 8(1) |
op_relation |
https://doi.org/10.17615/5j2z-n246 https://cdr.lib.unc.edu/downloads/g158bt38s?file=thumbnail https://cdr.lib.unc.edu/downloads/g158bt38s |
op_rights |
http://rightsstatements.org/vocab/InC/1.0/ |
op_doi |
https://doi.org/10.17615/5j2z-n246 |
_version_ |
1768391112449327104 |