Publications des scientifiques de l'IRD

Pietri A., Echevin Vincent, Testor P., Chaigneau Alexis, Mortier L., Grados C., Albert A. (2014). Impact of a coastal-trapped wave on the near-coastal circulation of the Peru upwelling system from glider data. Journal of Geophysical Research.Oceans, 119 (3), p. 2109-2120. ISSN 2169-9275.

Titre du document
Impact of a coastal-trapped wave on the near-coastal circulation of the Peru upwelling system from glider data
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000333816100035
Auteurs
Pietri A., Echevin Vincent, Testor P., Chaigneau Alexis, Mortier L., Grados C., Albert A.
Source
Journal of Geophysical Research.Oceans, 2014, 119 (3), p. 2109-2120 ISSN 2169-9275
Geostrophic alongshore velocity data from a glider repetitive section off the coast of Peru (14 degrees S) are used to study the cross-shore structure and temporal variability of the Peru current system during a 5 week period in April-May 2010. Besides providing substantial information on the surface frontal jet associated with the Peru Coastal Current and the surfacing Peru-Chile Undercurrent that flows poleward trapped on the continental shelf and slope, the glider data reveal the presence of an intense deep equatorward current, which transports up to approximate to 2.5 Sv. The dynamics of this current are investigated using an eddy-resolving regional model. The variability of the vertically sheared alongshore flow is shown to be related to the passage of a poleward propagating coastal-trapped wave likely of equatorial origin. Solutions from a two-dimensional, linear, coastal wave model suggest that the alongshore current observed vertical structure is associated with the second and third baroclinic modes of the coastal-trapped wave.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020] ; Limnologie physique / Océanographie physique [032]
Description Géographique
PEROU ; PACIFIQUE
Localisation
Fonds IRD [F B010062065]
Identifiant IRD
fdi:010062065
Contact