| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
A near-inertial mode observed within a Gulf Stream warm-core ring
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| Autores: |
Joyce, Terrence M.
Toole, John M.
Klein, Patrice
Thomas, Leif N.
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| Data: |
2013-04
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| Ano: |
2013
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| Palavras-chave: |
Near-inertial waves
Warm-core ring
Velocity fine structure
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| Resumo: |
Layering of ocean velocity fine structure has been coherently observed across the entire extent of a Gulf Stream warm-core ring using a shipboard acoustic Doppler current profiler system in September 2009 and independently sampled as the ring transited a moored array. Lines of constant velocity phase generally followed isopycnals as they deepened within the ring center. We also observed a clear separation of the vertical structure of the flows associated with the ring (of order 0.5m/s) with the shorter (200m) and less energetic (similar to 0.2m/s) flows of the velocity fine structure, which was further observed to rotate clockwise with increasing depth, consistent with downward propagating near-inertial waves (NIWs). Observations are consistent with a ring-scale NIW packet, probably wind forced, that shows enhanced NIW energy within the sloping pycnocline at depths of 300-700m. Evidence of wind-forced NIWs within anticylonic eddies in a numerical simulation shows some similar features to our observations, which we try to understand physically with basic WKB-type wave/current dynamics along the lines of previously published work and a new calculation of NIW trapping within an isolated, baroclinic vortex.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00148/25929/23966.pdf
DOI:10.1002/jgrc.20141
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| Editor: |
Amer Geophysical Union
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| Relação: |
http://archimer.ifremer.fr/doc/00148/25929/
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| Formato: |
application/pdf
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| Fonte: |
Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2013-04 , Vol. 118 , N. 4 , P. 1797-1806
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| Direitos: |
2013. American Geophysical Union. All Rights Reserved.
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