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Firing, Y. L., Scripps Institution of Oceanography, University of California, San Diego, La Jolla, USA, yfiring@ucsd.edu
Chereskin, T. K., Scripps Institution of Oceanography, University of California, San Diego, La Jolla, USA, tchereskin@ucsd.edu
Watts, D. R., Graduate School of Oceanography, University of Rhode Island, Narragansett, USA, rwatts@gso.uri.edu
Tracey, K. L., Graduate School of Oceanography, University of Rhode Island, Narragansett, USA, ktracey@gso.uri.edu

VORTICITY BALANCE IN DRAKE PASSAGE

As part of the cDrake experiment, an array of current meter-pressure sensor-inverted echo sounders deployed at 45 km spacing in the Polar Frontal zone in Drake Passage has provided three years of daily near-bottom current, bottom pressure, and round trip vertical acoustic travel time between sea floor and sea surface with spatial resolution sufficient to capture mesoscale eddies. Using empirical relationships determined by historical hydrography, objective maps of travel time data can be converted to vertical profiles of baroclinic currents. Daily geostrophic currents and bottom pressure thus enable us to estimate the terms of the geostrophic momentum and vorticity balances. Relative vorticity advection is an order of magnitude larger than planetary vorticity advection.

Poster presentation

Session #:004
Date: 2/20/2012
Time: 17:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: B2058