Tracking coherent structures in a regional ocean model with wavelet analysis: Application to Cape Basin eddies - art. no. C05043

Type Article
Date 2007-05
Language English
Author(s) Doglioli Andrea1, 3, Blanke Bruno2, 3, Speich Sabrina1, 3, Lapeyre Guillaume1, 3
Affiliation(s) 1 : CNRS, IFREMER, UMR 6523, UBO,Lab Phys Oceans, Brest, France.
2 : Ecole Normale Super, CNRS, IPSL, Meteorol Dynam Lab, Paris, France.
Source Journal of Geophysical Research ( JGR ) - Oceans (0148-0227) (American Geophysical Union), 2007-05 , Vol. 112 , N. C5 , P. NIL_18-NIL_29
DOI 10.1029/2006JC003952
WOS© Times Cited 82
Keyword(s) Southeast Atlantic ocean, Agulhas current system, wavelet analysis, regional modeling, Oceanic eddies
Abstract [1] This study is mainly aimed at proposing objective tools for the identification and tracking of three-dimensional eddy structures. It is conducted with a high-resolution numerical model of the ocean region around South Africa, and emphasis is put on Cape Basin anticyclones and cyclones thought to be actively implicated in the Indian-Atlantic interocean exchange. We settle on wavelet analysis for the decomposition and processing of successive maps of relative vorticity for a simulation run with 1/10 degrees resolution. The identification of three- dimensional coherent structures comes with the calculation of eddy trajectories and the time evolution of eddy properties. Instantaneous mass transport and momentum of eddies are calculated from the knowledge of instantaneous drift velocities, volumes, and diameters. The success of the regional model and of the analysis technique is assessed through comparisons with equivalent observations.
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Doglioli Andrea, Blanke Bruno, Speich Sabrina, Lapeyre Guillaume (2007). Tracking coherent structures in a regional ocean model with wavelet analysis: Application to Cape Basin eddies - art. no. C05043. Journal of Geophysical Research ( JGR ) - Oceans, 112(C5), NIL_18-NIL_29. Publisher's official version : https://doi.org/10.1029/2006JC003952 , Open Access version : https://archimer.ifremer.fr/doc/00000/2684/