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Provedor de dados:  ArchiMer
País:  France
Título:  Intrathermocline Eddies Embedded within an Anticyclonic Vortex Ring
Autores:  Meunier, Thomas
Tenreiro, M.
Pallas-sanz, Enric
Ochoa, Jose
Ruiz-angulo, Angel
Portela, Esther
Cusi, Simo
Damien, Pierre
Carton, Xavier
Data:  2018-08
Ano:  2018
Palavras-chave:  Intrathermocline eddies
Submesoscale coherent vortices
Vortex lenses
Loop current eddy
Gulf of Mexico
Resumo:  High‐resolution hydrographic measurements reveal the presence of three Intra‐Thermocline Eddies (ITEs) embedded within a Loop Current Eddy (LCE). ITEs are lenticular bodies of nearly homogeneous water which contrasts with the well stratified surrounding water. Their radii and thickness ranged between [19‐32] km and [150‐250] m. Negative relative vorticity within their cores (down to ‐0.85 times the Coriolis frequency), along with a large negative stratification anomaly, result in low Ertel Potential Vorticity (PV) and intense negative Ertel Potential Vorticity Anomalies (PVA). Vortex stretching and relative vorticity have comparable contributions to PVA, resulting in Burger numbers of order unity. The similarity of thermohaline properties within the ITE's cores and the surrounding LCE water, suggests that these ITEs likely form by intense mixing events followed by Rossby adjustment.
Tipo:  Text
Idioma:  Inglês

Editor:  Amer Geophysical Union
Formato:  application/pdf
Fonte:  Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2018-08 , Vol. 45 , N. 15 , P. 7624-7633
Direitos:  2018 American Geophysical Union. All Rights Reserved.


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