A Lagrangian analysis of the Indian-Atlantic interocean exchange in a regional model - art. no. L14611

Type Article
Date 2006-07
Language English
Author(s) Doglioli Andrea1, 4, Veneziani M2, Blanke Bruno1, 4, 5, Speich Sabrina4, Griffa A2, 3
Affiliation(s) 1 : Univ Bretagne Occidentale, UFR Sci & Tech, IFREMER, CNRS,UMR 6523,Lab Phys Oceans, F-29238 Brest 3, France.
2 : Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Div Meteorol & Phys Oceanog, Miami, FL 33149 USA.
3 : CNR, Ist Sci Marine, La Spezia, Italy.
Source Geophysical Research Letters ( GRL ) (0094-8276) (American Geophysical Union), 2006-07 , Vol. 33 , N. 14 , P. NIL_48-NIL_52
DOI 10.1029/2006GL026498
WOS© Times Cited 38
Keyword(s) Anticyclones transport, Cyclones transport, The Indian Atlantic interocean exchange, South Africa, Numerical model
Abstract We present a new numerical Lagrangian technique based on the coupling of transport computation with spin analysis of trajectories. This method was applied to results from a high-resolution numerical model of the oceanic region around South Africa. We estimated an Indian-Atlantic leakage of about 14 Sv. In the western Cape Basin, approximately 30% of this transport is due to trapping eddies with a ratio between cyclones and anticyclones transport of 1.3. These findings are briefly discussed with respect to recent observations of the highly nonlinear regime found in this area of the Cape Basin.
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