Circulation and Variability at the Southern Boundary of the Brazil Basin.

Hogg, N., Siedler, Gerold and Zenk, Walter (1999) Circulation and Variability at the Southern Boundary of the Brazil Basin. Open Access Journal of Physical Oceanography, 29 . pp. 145-157. DOI 10.1175/1520-0485(1999)029<0145:CAVATS>2.0.CO;2.

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Abstract

As a contribution to the WOCE Deep Basin Experiment, an array of current meters with individual record lengths exceeding ii years was set across the southern boundary of the Brazil Basin between early 1991 and early 1996. The array spanned the Santos Plateau, the Vema Channel, and the Hunter Channel, all areas believed to be important for transport of Antarctic Bottom Water between the Argentine and Brazil Basins. From the combination of geostrophic velocities computed from hydrographic stations and those directly measured, the total transport of bottom water (potential temperature below 2 degrees C) is estimated to be about 6.9 Sv (Sv = 10(6) m(3) s(-1)) northward, with about 4 Sv coming through the Vema Channel and the remainder through the Hunter Channel.
Properties of the eddy field are also discussed. Eddy energy levels and their spatial distribution are similar to comparable regimes in the North Atlantic. Integral timescales vary from a few days to several weeks with distance from the Brazil Current and the western boundary. The eddy heat Bur is in the same direction as the heat advection by the mean flow but considerably smaller.

Document Type: Article
Keywords: Physical Oceanography; ANTARCTIC BOTTOM WATER; VEMA CHANNEL; FLOW; ATLANTIC; FLUX
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-PO Physical Oceanography
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1175/1520-0485(1999)029<0145:CAVATS>2.0.CO;2
ISSN: 0022-3670
Projects: WOCE
Expeditions/Models/Experiments:
Date Deposited: 18 Feb 2008 17:24
Last Modified: 06 Apr 2018 09:25
URI: http://oceanrep.geomar.de/id/eprint/1738

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