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Lagrangian perspectives of deep water export from the subpolar North Atlantic

Record type: Article

Direct observations at the Grand Banks have raised a quandary concerning the pathways of the lower branch of the meridional overturning circulation: In contrast to moored current meters that depict an intense, narrow Deep Western Boundary Current (DWBC), observations using different float types failed to show this continuous export path. Here, this issue is addressed by a Lagrangian analysis of synthetic particles in an eddy-resolving circulation model. Due to intense eddy activity around the Grand Banks, about 40% of the deep water in the DWBC is diverted into the interior, spreading southward along the western flank of the Mid-Atlantic Ridge or with the eddying flow field in the basin interior. Imposing constraints on the vertical displacements of particles similar to those experienced by observational floats further reduces their adherence to the DWBC, particularly near the southern tip of the Grand Banks.

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Citation

Getzlaff, K., Boening, C.W. and Dengg, J. (2006) Lagrangian perspectives of deep water export from the subpolar North Atlantic Geophysical Research Letters, 33, (21), L21S08. (doi:10.1029/2006GL026470).

More information

Published date: 2006
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 44276
URI: http://eprints.soton.ac.uk/id/eprint/44276
ISSN: 0094-8276
PURE UUID: 96c36430-a2de-4826-ab73-9e381f3ec724

Catalogue record

Date deposited: 21 Feb 2007
Last modified: 17 Jul 2017 15:15

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Contributors

Author: K. Getzlaff
Author: C.W. Boening
Author: J. Dengg

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