Consulta: subjectFacets:"Mediterranean circulation"
Registros recuperados: 2
Data/hora: 27/07/2024 01:59:57

Causes of long-term changes in Aegean sea deep water
Provedor de dados: 5
Autores: Boscolo, R; Bryden, H.
Recent observations of newly formed deep water in the Aegean sea prompts this analysis of whether such deep water could be formed locally by the combination of an increase in net evaporation and wintertime water mass transformation. River diversion projects in Russia and Egypt since the 1950s have effectively increased the amount of net evaporation over the eastern Mediterranean basin. Historical profiles show that low salinity intermediate waters separated the deep and upper waters in the Aegean in 1961-1962. Within a simple mixed layer model, imposing a small net evaporation of 10 cm.yr(-1) on the observed hydrographic conditions in March 1962 results in the gradual erosion of the low salinity intermediate waters. After 25 years, the low salinity...
Tipo: Text
Palavras-chave: Échanges océan-atmosphère; Formation d’eau profonde; Circulation en Méditerranée; Budget hydrologique; Mer Égée; Air-sea interaction; Deep water formation; Mediterranean circulation; Hydrological budget; Aegean sea.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43329/42898.pdf

Comparison between Eulerian diagnostics and finite-size Lyapunov exponents computed from altimetry in the Algerian basin
Provedor de dados: 5
Autores: D'Ovidio, Francesco; Isern-fontanet, Jordi; Lopez, Cristobal; Hernandez Garcia, Emilio; Garcia Ladona, Emilio.
Transport and mixing properties of surface currents can be detected from altimetric data by both Eulerian and Lagrangian diagnostics. In contrast with Eulerian diagnostics, Lagrangian tools like the local Lyapunov exponents have the advantage of exploiting both spatial and temporal variability of the velocity field and are in principle able to unveil subgrid filaments generated by chaotic stirring. However, one may wonder whether this theoretical advantage is of practical interest in real-data, mesoscale and sub-mesoscale analysis, because of the uncertainties and resolution of altimetric products, and the non-passive nature of biogeochemical tracers. Here we compare the ability of standard Eulerian diagnostics and the finite-size Lyapunov exponent in...
Tipo: Text
Palavras-chave: Lagrangian dynamics; Mediterranean circulation; Altimetry; Filaments; Sub mesoscale.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6136.pdf