Eriksen, C. ., university of Washington, Seattle, USA, eriksen@u.washington.edu
Rhines, P. B., university of washington, Seattle, USA, rhines@ocean.washington.edu

EXPLORING ATLANTIC MERIDIONAL OVERTURNING ALONG THE ICELAND FAROE RIDGE

Between Iceland and the Faroe Islands a significant branch of the warm, saline Atlantic Water moves poleward to join the Norwegian Current (roughly 3.3 Sverdrups of the estimated total 8 Sverdrups of northward flow at this latitude). At depth, dense waters spill southward to join the Faroe-Bank Channel outflow, after significant mixing becoming the Northeast Atlantic Deep Water. Roughly 3 Sverdups of overflow occur in the combined Faroe-Bank Channel and Iceland Faroe Ridge, comparable with the roughly 3 Sverdrups of deep water passing through the Denmark Strait. The Iceland-Faroe Ridge (IFR) pathway has not been clearly established: neither as to its location, transport nor variability. Deployments of up to three Seagliders at a time with hydrography/oxygen/biooptics sensors along the southern flank of the IFR have been carried out since Nov. 2006. Early results suggest significant overflow pathways in two valleys close to the Faroes, with less overflow activity than anticipated near Iceland. Cross-ridge sections show at high resolution the sloping top-to-bottom Iceland-Faroe front, which balances the warm Faroes current at the top, and devolves to a thin, turbulent benthic boundary layer hugging the southern slope of the Ridge. Velocity fields appear to be surprisingly barotropic (as is often the case in weakly stratified high latitude waters), and involve strong, episodic jets and eddies.

http://www.ocean.washington.ed

Poster presentation

Presentation is given by student: No
Session #:085
Date: 03-04-2008
Time: 17:30 - 19:30

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