On the boundary flow off Brazil at 5-10°S and its conncetion to the interior tropical Atlantic.

Schott, Friedrich, Brandt, Peter , Hamann, Meike, Fischer, Jürgen and Stramma, Lothar (2002) On the boundary flow off Brazil at 5-10°S and its conncetion to the interior tropical Atlantic. Open Access Geophysical Research Letters, 29 (17). p. 1840. DOI 10.1029/2002GL014786.

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Abstract

Within the context of the German CLIVAR program, an observational program in the western tropical Atlantic with shipboard sections, profiling floats and a moored array aims at studying the role of the shallow thermohaline subtropical cell (STC) in tropical-subtropical interactions and the cold water transports underneath. From 6 repeated shipboard profiling sections off Brazil near 5°S a northward warm water transport above 1100 m of 25.0 ± 4.4 Sv is determined, of which 13.4 ± 2.7 Sv occur in the thermocline layer supplying the Equatorial Undercurrent. Trajectories of 15 profiling floats released near the western boundary are presented that drift at shallow levels (200 m and 400 m) and delineate the different STC branches. For the southward flow of North Atlantic Deep Water (NADW) a section-mean transport of −31.7 ± 9.2 Sv was determined at 5°S. However, different from the steady NADW flow observed earlier along the topography north of the equator, the NADW currents at 5–10°S are much more variable with long periods of northward counterflow along the topography.

Document Type: Article
Keywords: Physical Oceanography; Oceanography: Physical: Western boundary currents, Oceanography: Physical: Currents, Oceanography: Physical: General circulation
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1029/2002GL014786
ISSN: 0094-8276
Projects: CLIVAR
Date Deposited: 18 Feb 2008 17:25
Last Modified: 19 Feb 2018 14:26
URI: http://oceanrep.geomar.de/id/eprint/6963

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