Data/hora: 12/06/2024 04:37:56

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Biweekly current oscillations on the continental slope of the Gulf of Guinea	
Autores: 	Vangriesheim, Annick; Treguier, Anne-marie; Andre, Gael.	
Data: 	2005-11	
Ano: 	2005	
Palavras-chave: 	Linear wave model; Current meter measurement; Current oscillation; Continental slope.	
Resumo: 	Current meter measurements have been carried out for 3 years on the continental slope of the Gulf of Guinea, near 7.5 degrees S off the Angola coast. Currents in a water depth of 1300 m over the continental slope show a remarkable biweekly oscillation, bottom intensified, and with currents oriented nearly parallel to the isobaths. With a peak-to-peak amplitude reaching 20-30 cm s(-1) at 30 in above the bottom, this signal is the most energetic at sub-inertial frequencies. Simultaneous measurements deeper on the continental rise (in a water depth of 4000 m) show a more complex signal dominated by lower frequencies, and with less clear polarization. Simple linear topographic wave theories are compared to the observations. A combination of coastal trapped waves with cross-slope mode 3-5 could be consistent with the observed currents. A three-dimensional 1/6 degrees model suggests the existence of modes trapped to the slope, although with lower amplitude than observed.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/2005/publication-1032.pdf

DOI:10.1016/j.dsr.2005.05.010	
Editor: 	Elsevier	
Relação: 	http://archimer.ifremer.fr/doc/00000/1032/	
Formato: 	application/pdf	
Fonte: 	Deep Sea Research Part I: Oceanographic Research Papers (0967-0637) (Elsevier), 2005-11 , Vol. 52 , N. 11 , P. 2168-2183	
Fonte: 	2005 Elsevier Ltd All rights reserved