Data/hora: 13/06/2024 04:43:16

Provedor de dados: 	5	
País: 	France	
Título: 	Etude numérique de la mer d'Iroise : dynamique, variabilité du front d'Ouessant et évaluation des échanges cross-frontaux	
Autores: 	Cambon, Gildas.	
Data: 	2008-04-09	
Ano: 	2008	
Palavras-chave: 	Realistic numerical modelling; Cross frontal transports; Tidal front; Tides; Mean general circulation; Iroise Sea; Modélisation numérique réaliste; Transports cross frontaux; Front de marée; Marée; Circulation générale moyenne; Front d'Ouessant; Mer d'Iroise.	
Resumo: 	This thesis was written in the framework of a realistic modelisation for the study of the Iroise Sea. The first two parts deal with its digital implementation and validation based on observation. We then focus on the analysis of the main structures and physical processes operating in the Iroise Sea: first the Ouessant tidal front and the processes associated with the connexion of surface and bottom mixing layers, then the average eulerian residual circulation for which we tried to quantify the relative part of the different processes involved. We then mapped the different dynamic regimes involved: some cyclostrophic regimes can be observed around the islands and in shallow water areas, and a geostrophic regime clearly appears, at front level, especially in summer. However, in most of the studied area, different dynamic terms are involved in an equivalent manner. From a thermic point of view, the analysis of the heat assessment shows that air-sea fluxes rule over advective fluxes, although the latter induces a marked high frequency modulation of the net heat gain. Then, a diagnostic parameter of the front was established and the role of some different external forcings (air/sea heat flux, wind tension, spring/slack tide cycles) on the variability of the Ouessant front was highlighted through sensitivity experiments. Finally, we carried out the study of the cross-front mass exchanges, based on the monitoring of lagrangian particles. The methodology seems reliable and the first results show that these exports follow some special latitude "canals".	
Tipo: 	Text	
Idioma: 	Francês	
Identificador: 	http://archimer.ifremer.fr/doc/2008/these-6166.pdf	
Editor: 	Université de Bretagne Occidentale	
Relação: 	http://archimer.ifremer.fr/doc/00000/6166/	
Formato: 	application/pdf