Data/hora: 08/06/2024 09:26:39

Provedor de dados: | 5
País: | France
Título: | Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A
Autores: | Ardhuin, Fabrice; Collard, Fabrice; Chapron, Bertrand; Ardhuin, Fanny; Guitton, Gilles; Mouche, Alexis; Stopa, Justin.
Data: | 2015-04
Ano: | 2015
Palavras-chave: | Ocean waves; SAR; Sea ice.
Resumo: | Swell evolution from the open ocean into sea ice is poorly understood, in particular the amplitude attenuation expected from scattering and dissipation. New synthetic aperture radar (SAR) data from Sentinel-1A wave mode reveal intriguing patterns of bright oscillating lines shaped like instant noodles. We investigate cases in which the oscillations are in the azimuth direction, around a straight line in the range direction. This observation is interpreted as the distortion by the SAR processing of crests from a first swell, due to the presence of a second swell. Since deviations from a straight line should be proportional to the orbital velocity toward the satellite, swell height can be estimated, from 1.5 to 5 m in the present case. The evolution of this 13 s period swell across the ice pack is consistent with an exponential attenuation on a length scale of 200 km.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00256/36718/35332.pdf

DOI:10.1002/2014GL062940

http://archimer.ifremer.fr/doc/00256/36718/

Editor: | Amer Geophysical Union
Relação: | info:eu-repo/grantAgreement/EC/FP7/607476/EU//SWARP
Formato: | application/pdf
Fonte: | Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2015-04 , Vol. 42 , N. 7 , P. 2317-2325

Fonte:

2015. American Geophysical Union. All Rights Reserved.

info:eu-repo/semantics/openAccess

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