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	Provedor de dados ArchiMer (2) Autor Chapron, Bertrand (2) Collard, Fabrice (2) Hansen, M. W. (2) Johannessen, J. A. (2) Dagestad, K. -f. (1) Dagestad, K. F. (1) Kudryavtsev, V. (1) Mouche, A.a. (1) Mais... Palavra-chave Doppler velocity (1) Normalized radar cross section (1) SAR (1) Tidal current (1) Waves (1) Tipo do documento Text (2) Ano 2012 (1) 2011 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Simulation of radar backscatter and Doppler shifts of wave-current interaction in the presence of strong tidal current ArchiMer Hansen, M. W.; Kudryavtsev, V.; Chapron, Bertrand; Johannessen, J. A.; Collard, Fabrice; Dagestad, K. -f.; Mouche, A.a.. A radar imaging model including a Doppler shift module is presented for quantitative studies of radar observations of wave-current interaction in a strong tidal current regime. The model partitions the Doppler shift into the relative contribution arising from the motion of the backscattering facets including Bragg waves, specular points, and breaking waves that are advected by and interact with the underlying surface current. Simulated and observed normalized radar cross sections and Doppler shifts for different environmental conditions and radar parameters are compared and discussed. (C) 2012 Elsevier Inc. All rights reserved. Tipo: Text Palavras-chave: SAR; Tidal current; Waves; Normalized radar cross section; Doppler velocity. Ano: 2012 URL: http://archimer.ifremer.fr/doc/00083/19438/17086.pdf Monitoring the surface inflow of Atlantic Water to the Norwegian Sea using Envisat ASAR ArchiMer Hansen, M. W.; Johannessen, J. A.; Dagestad, K. F.; Collard, Fabrice; Chapron, Bertrand. Sea surface range Doppler velocities from nearly 1200 Envisat Advanced Synthetic Aperture Radar (ASAR) acquisitions between 2007 and 2011, covering the Norwegian Sea, the North Sea, and the Skagerrak Sea, have been examined. After systematic corrections, the inflow of Atlantic Water to the Norwegian Sea, via the two branches of the Norwegian Atlantic Current, is investigated. Distinct expressions of the eastern branch, the Norwegian Atlantic Slope Current, are revealed with a speed of 20-40 cm/s and a clear manifestation of topographic steering along the 500 m isobath. The western branch, the Norwegian Atlantic Front Current, is also depicted but with lower surface velocities. Moreover, parts of the Norwegian Coastal Current are also detected with... Tipo: Text Ano: 2011 URL: http://archimer.ifremer.fr/doc/00056/16771/14216.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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