Data/hora: 01/06/2024 01:38:36

Provedor de dados: 	5	
País: 	France	
Título: 	A near-inertial mode observed within a Gulf Stream warm-core ring	
Autores: 	Joyce, Terrence M.; Toole, John M.; Klein, Patrice; Thomas, Leif N.	
Data: 	2013-04	
Ano: 	2013	
Palavras-chave: 	Near-inertial waves; Warm-core ring; Velocity fine structure.	
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.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00148/25929/23966.pdf

DOI:10.1002/jgrc.20141	
Editor: 	Amer Geophysical Union	
Relação: 	http://archimer.ifremer.fr/doc/00148/25929/	
Formato: 	application/pdf	
Fonte: 	Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2013-04 , Vol. 118 , N. 4 , P. 1797-1806	
Fonte: 	2013. American Geophysical Union. All Rights Reserved.