Labrador Sea Water tracked by profiling floats - from the boundary current into the open North Atlantic.

Fischer, Jürgen and Schott, Friedrich (2002) Labrador Sea Water tracked by profiling floats - from the boundary current into the open North Atlantic. Open Access Journal of Physical Oceanography, 32 . pp. 573-584. DOI 10.1175/1520-0485(2002)032<0573:LSWTBP>2.0.CO;2.

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Abstract

Fifteen profiling floats were injected into the deep boundary current off Labrador. They were ballasted to drift in the core depth of Labrador Sea Water (LSW) at 1500-m depth and were deployed in two groups during March and July/August 1997. Initially, for about three months, the floats were drifting within the boundary current, and the flow vectors were used to determine the mean horizontal structure of the Deep Labrador Current, which was found to be about 100 km wide with an average core speed of 18 cm s−1. North of Flemish Cap the boundary current encounters complicated topography around “Orphan Knoll,” and there the LSW outflow splits up into different routes. One obvious LSW path is eastward through the Charlie Gibbs Fracture Zone and another route is a narrow recirculation toward the central Labrador Sea. A surprising result was that none of the floats were able to follow the boundary current southward to the Grand Banks area and exit into the subtropics. Trajectories and temperature profiles of the eastward drifting floats indicate the importance of the North Atlantic Current for dispersing the floats, even at the level of LSW.

Document Type: Article
Keywords: Physical Oceanography; Labrador Sea
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(2002)032<0573:LSWTBP>2.0.CO;2
ISSN: 0022-3670
Date Deposited: 18 Feb 2008 17:25
Last Modified: 06 Apr 2018 12:27
URI: http://oceanrep.geomar.de/id/eprint/5779

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