Data/hora: 09/06/2024 09:49:35

Provedor de dados: | 5
País: | France
Título: | Improvements to estimating the air-sea gas transfer velocity by using dual-frequency, altimeter backscatter
Autores: | Goddijn-murphy, Lonneke; Woolf, David; Chapron, Bertrand; Queffeulou, Pierre.
Data: | 2013-12
Ano: | 2013
Palavras-chave: | Air-sea gas transfer; Satellite altimetry; DMS.
Resumo: | Air-sea gas exchange is affected by sea surface roughness and a previous study shows a significant relation between Ku-band backscattering from satellite altimeters and field estimates of gas transfer velocity, K. Recently C-band backscatter data were made available for altimeters on board the JASON-1 and JASON-2 satellites. In this paper we used experimental data from the same cruises to show that using the difference between the Ku-band and C-band signals to estimate sea surface roughness, and thus reducing the contribution from longer waves, improved the K estimates. This is consistent with the theory that gas transfer is largely controlled by short capillary-gravity waves. For satellite data closer than 2 hr and 0.5 degrees from the K sample stations, the dual-frequency parameterization is found to perform better than a wind speed parameterization that uses in situ wind speed. The improvement supports the hypothesis that gas transfer is more directly related to surface roughness than to surface wind.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00174/28564/26980.pdf

DOI:10.1016/j.rse.2013.07.026

https://archimer.ifremer.fr/doc/00174/28564/

Editor: | Elsevier Science Inc
Formato: | application/pdf
Fonte: | Remote Sensing Of Environment (0034-4257) (Elsevier Science Inc), 2013-12 , Vol. 139 , P. 1-5

Fonte:

2013 Elsevier Inc. All rights reserved.

info:eu-repo/semantics/openAccess

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