Data/hora: 06/06/2024 01:32:02

Provedor de dados: | 5
País: | France
Título: | Large-amplitude internal tides, solitary waves, and turbulence in the central Bay of Biscay
Autores: | Xie, X. H.; Cuypers, Y.; Bouruet-aubertot, P.; Ferron, Bruno; Pichon, Annick; Lourenco, A.; Cortes, Norbert.
Data: | 2013-06
Ano: | 2013
Palavras-chave: | Internal tides; Solitary waves; Turbulence; Bay of Biscay.
Resumo: | Microstructure and fine-scale measurements collected in the central Bay of Biscay during the MOUTON experiment are analyzed to investigate the dynamics of internal waves and associated mixing. Large-amplitude internal tides (ITs) that excite internal solitary waves (ISWs) in the thermocline are observed. ITs are dominated by modes 3 and 4, while ISWs projected on mode 1 that is trapped in the thermocline. Therein, ITs generate a persistent narrow shear band, which is strongly correlated with the enhanced dissipation rate in the thermocline. This strong dissipation rate is further reinforced in the presence of ISWs. Dissipation rates during the period without ISWs largely agree with the MacKinnon-Gregg scaling proposed for internal wavefields dominated by a low-frequency mode, while they show poor agreement with the Gregg-Henyey parameterization valid for internal wavefields close to the Garrett-Munk model. The agreement with the MacKinnon-Gregg scaling is consistent with the fact that turbulent mixing here is driven by the low-frequency internal tidal shear.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00151/26232/24299.pdf

DOI:10.1002/grl.50533

Editor: | Amer Geophysical Union
Relação: | http://archimer.ifremer.fr/doc/00151/26232/
Formato: | application/pdf
Fonte: | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2013-06 , Vol. 40 , N. 11 , P. 2748-2754
Fonte: | 2013. American Geophysical Union. All Rights Reserved.