Data/hora: 07/06/2024 06:26:47

Provedor de dados: 	5	
País: 	France	
Título: 	Intense deformation field at oceanic front inferred from directional sea surface roughness observations	
Autores: 	Rascle, Nicolas; Molemaker, Jeroen; Marie, Louis; Nouguier, Frederic; Chapron, Bertrand; Lund, Bjorn; Mouche, Alexis.	
Data: 	2017-06	
Ano: 	2017	
Palavras-chave: 	Sea surface roughness; Surface current; Remote sensing; Sun glitter; High resolution; Oceanic fronts.	
Resumo: 	Fine scale current gradients at the ocean surface can be observed by sea surface roughness. More specifically, directional surface roughness anomalies are related to the different horizontal current gradient components. This paper reports results from a dedicated experiment during the LASER (LAgrangian Submesoscale ExpeRiment) drifter deployment. A very sharp front, 50 m wide, is detected simultaneously in drifter trajectories, sea surface temperature and sea surface roughness. A new observational method is applied, using sun glitter reflections during multiple airplane passes to reconstruct the multi-angle roughness anomaly. This multi-angle anomaly is consistent with wave-current interactions over a front, including both cross-front convergence and along-front shear with cyclonic vorticity. Qualitatively, results agree with drifters and X-band radar observations. Quantitatively, the sharpness of roughness anomaly suggests intense current gradients, 0.3 m s−1 over the 50 m wide front. This work opens new perspectives for monitoring intense oceanic fronts using drones or satellite constellations.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00386/49767/50301.pdf

DOI:10.1002/2017GL073473

http://archimer.ifremer.fr/doc/00386/49767/	
Editor: 	Amer Geophysical Union	
Formato: 	application/pdf	
Fonte: 	Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2017-06 , Vol. 44 , N. 11 , P. 5599-5608	
Fonte: 	2017. American Geophysical Union. All Rights Reserved.

info:eu-repo/semantics/openAccess

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