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On the Deep Western Boundary Current south of Cape Cod

Joyce, Terrence M., Dunworth-Baker, Jane, Pickart, Robert S., Torres, Daniel and Waterman, Stephanie (2005) On the Deep Western Boundary Current south of Cape Cod Deep Sea Research Part II: Topical Studies in Oceanography, 52, (3-4), pp. 615-625. (doi:10.1016/j.dsr2.2004.12.013).

Record type: Article

Abstract

Using CTD/oxygen data from eight cruises in the decade from 1994–2003, we have constructed a mean ‘section’ of properties across the Deep Western Boundary Current (DWBC) south of Cape Cod near 701W. Since all sections included direct velocity measurements, our composite section enables us to portray the flow field as well as the mean water mass structure. Inshore of the Gulf Stream between the 2500 and 4000m isobaths, the flow is to the southwest along the bathymetry and is remarkably barotropic. The equatorward flowing Labrador Sea Water is shown to have high dissolved oxygen, low salinity, and low potential vorticity, while the underlying Overflow Water is high in oxygen. Transport estimates for the cold limb of the thermohaline circulation give a range of 14 to 19 Sv for the N. Atlantic Deep Water found on the section. The greatest uncertainty is due to the presence of a Warm-Core Ring on one of the sections, which apparently completely reversed the flow in the DWBC. Offshore of the DWBC, some of the deep source waters are returned to the north in the deep Gulf Stream. The section is compared to two other, widely separated locations (Abaco and 551W) that have markedly different DWBC characteristics.

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Published date: February 2005

Identifiers

Local EPrints ID: 72015
URI: http://eprints.soton.ac.uk/id/eprint/72015
ISSN: 0967-0645
PURE UUID: c9152fbb-d598-4dae-8ad4-0cd59a9cb594

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Date deposited: 14 Jan 2010
Last modified: 18 Jul 2017 23:57

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Contributors

Author: Terrence M. Joyce
Author: Jane Dunworth-Baker
Author: Robert S. Pickart
Author: Daniel Torres
Author: Stephanie Waterman

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