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dc.contributor.authorNunez-Riboni, Ismael  Concept link
dc.contributor.authorBoebel, Olaf  Concept link
dc.contributor.authorOllitrault, Michel  Concept link
dc.contributor.authorYou, Yuzhu  Concept link
dc.contributor.authorRichardson, Philip L.  Concept link
dc.contributor.authorDavis, Russ E.  Concept link
dc.date.accessioned2006-01-11T18:57:35Z
dc.date.available2006-01-11T18:57:35Z
dc.date.issued2004-12-09
dc.identifier.urihttps://hdl.handle.net/1912/412
dc.descriptionAuthor Posting. © The Authors, 2004. This is the author's version of the work. It is posted here by permission of Elsevier B. V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part II: Topical Studies in Oceanography 52 (2005): 545-564, doi:10.1016/j.dsr2.2004.12.006.
dc.description.abstractThis study combines float data from different projects collected between 1991 and 2003 in the South Atlantic to describe the flow of Antarctic Intermediate Water (AAIW). Velocity spacetime averages are calculated for various grid resolutions and with cells deformed to match the bathymetry, f/H or f/h (with H being the water depth and h being the thickness of the AAIW layer). When judged by the degree of alignment between respective isolines and the resulting average velocity fields, the best grid is based on a nominal cell size of 3º (latitude) by 4º (longitude) with cell shapes deformed according to f/h. Using this grid, objectively estimated mean currents (and their associated errors), as well as meridional and zonal volume transports are estimated. Results show an anticyclonic Subtropical Gyre centred near 36ºS and spanning from 23º±1°S to 46° ± 1ºS. The South Atlantic Current meanders from 33ºS to 46ºS and shows a mean speed of 9.6 ± 7.8 cm s-1 (8.5 Sv ± 3.5 Sv; 1 Sv = 1×106 m3 s-1). The northern branch of the Subtropical Gyre is located between 22ºS and 32ºS and flows westward with a mean speed of 4.7 ± 3.3 cm s-1 (9.3 Sv ± 3.4 Sv). Evidence of a cyclonic Tropical Gyre divided in two sub-cells is visible on the stream function.en
dc.description.sponsorshipThis work is supported through NSF-Grant no. OCE-0095647 and through the Alfred Wegener Institute for Polar and Marine Research.en
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dc.language.isoen_USen
dc.relation.urihttps://doi.org/10.1016/j.dsr2.2004.12.006
dc.subjectAntarctic Intermediate Water (AAIW)en
dc.subjectFloatsen
dc.subjectNeutral density surfacesen
dc.subjectSouth Atlanticen
dc.subjectLagrangian circulationen
dc.subjectTransportsen
dc.subjectObjective analysisen
dc.titleLagrangian circulation of Antarctic Intermediate Water in the subtropical South Atlanticen
dc.typePreprinten


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