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GEOPHYSICAL RESEARCH LETTERS, VOL. 29, NO. 24, 2212, doi:10.1029/2002GL014968, 2002

On the cause of Scotian Shelf Water crossovers

Yang-Ki Cho

Department of Oceanography, Chonnam National University, Kwangju, Korea


Robert C. Beardsley

Woods Hole Oceanographic Institution, Woods Hole, Maryland, USA


Vitalii A. Sheremet

Woods Hole Oceanographic Institution, Woods Hole, Maryland, USA


Abstract

Satellite images and hydrographic data show episodic flows of Scotian Shelf Water (SSW) across the Northeast Channel to Georges Bank. These flows carry nutrients, plankton, and larval fish and may play an important role in the ecology of Georges Bank. Despite their importance, there is yet no clear explanation of the crossover mechanism. We show here using numerical model results and hydrographic data that the jet flowing along the front between the relatively dense Slope Water and the light Shelf Water is a primary factor in driving SSW crossovers. The crossover of SSW depends on the density difference between these two water masses.

Published 27 December 2002.

Index Terms: 4512 Oceanography: Physical: Currents; 4219 Oceanography: General: Continental shelf processes; 4227 Oceanography: General: Diurnal, seasonal, and annual cycles; 4528 Oceanography: Physical: Fronts and jets.

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Citation: Cho, Y., R. C. Beardsley, and V. A. Sheremet (2002), On the cause of Scotian Shelf Water crossovers, Geophys. Res. Lett., 29(24), 2212, doi:10.1029/2002GL014968.