Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados ArchiMer (2) Autor Carton, Xavier (2) Meunier, Thomas (2) Cusi, Simo (1) Damien, Pierre (1) Le Gentil, Sylvie (1) Menesguen, Claire (1) Ochoa, Jose (1) Pallas-sanz, Enric (1) Portela, Esther (1) Ruiz-angulo, Angel (1) Schopp, Richard (1) Tenreiro, M. (1) Mais... Palavra-chave Intrathermocline eddies (2) Vortex lenses (2) Gulf of Mexico (1) Instability (1) Loop current eddy (1) Optimal perturbations (1) Submesoscale (1) Submesoscale coherent vortices (1) Mais... Tipo do documento Text (2) Ano 2018 (2) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Optimal Perturbations of an Oceanic Vortex Lens ArchiMer Meunier, Thomas; Menesguen, Claire; Carton, Xavier; Le Gentil, Sylvie; Schopp, Richard. The stability properties of a vortex lens are studied in the quasi geostrophic (QG) framework using the generalized stability theory. Optimal perturbations are obtained using a tangent linear QG model and its adjoint. Their fine-scale spatial structures are studied in details. Growth rates of optimal perturbations are shown to be extremely sensitive to the time interval of optimization: The most unstable perturbations are found for time intervals of about 3 days, while the growth rates continuously decrease towards the most unstable normal mode, which is reached after about 170 days. The horizontal structure of the optimal perturbations consists of an intense counter-shear spiralling. It is also extremely sensitive to time interval: for short time... Tipo: Text Palavras-chave: Vortex lenses; Intrathermocline eddies; Instability; Optimal perturbations. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00454/56605/58297.pdf Intrathermocline Eddies Embedded within an Anticyclonic Vortex Ring ArchiMer Meunier, Thomas; Tenreiro, M.; Pallas-sanz, Enric; Ochoa, Jose; Ruiz-angulo, Angel; Portela, Esther; Cusi, Simo; Damien, Pierre; Carton, Xavier. 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... Tipo: Text Palavras-chave: Intrathermocline eddies; Submesoscale coherent vortices; Vortex lenses; Loop current eddy; Gulf of Mexico; Submesoscale. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00440/55122/56578.pdf Registros recuperados: 2 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco