| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
Estimates of ocean wave heights and attenuation in sea ice using the SAR wave mode on Sentinel-1A
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| Autores: |
Ardhuin, Fabrice
Collard, Fabrice
Chapron, Bertrand
Ardhuin, Fanny
Guitton, Gilles
Mouche, Alexis
Stopa, Justin
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| Data: |
2015-04
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| Ano: |
2015
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| Palavras-chave: |
Ocean waves
SAR
Sea ice
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| 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.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
http://archimer.ifremer.fr/doc/00256/36718/35332.pdf
DOI:10.1002/2014GL062940
http://archimer.ifremer.fr/doc/00256/36718/
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| Editor: |
Amer Geophysical Union
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| Relação: |
info:eu-repo/grantAgreement/EC/FP7/607476/EU//SWARP
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| Formato: |
application/pdf
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| Fonte: |
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2015-04 , Vol. 42 , N. 7 , P. 2317-2325
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| Direitos: |
2015. American Geophysical Union. All Rights Reserved.
info:eu-repo/semantics/openAccess
restricted use
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