Cross-Frontal Water Exchange on Georges Bank: Some Results from an U.S. GLOBEC/Georges Bank Program Model Study |
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| Authors: | Changsheng Chen Robert C Beardsley |
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| Institution: | (1) School for Marine Science and Technology, University of Massachusetts-Dartmouth, 706 South Rodney French Boulevard, New Bedford, MA, 02744-1221, U.S.A;(2) Department of Physical Oceanography, Woods Hole Oceanographic Institution, Woods Hole, MA, 02543, U.S.A |
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| Abstract: | This paper reviews recent progress on modeling cross-frontal water exchange on Georges Bank undertaken as part of the U.S.
Global Ecosystem Northwest Atlantic/Georges Bank Study (U.S. GLOBEC/Georges Bank Program). A simple conceptual model is described
first, followed by a discussion of four physical mechanisms associated with (1) strong nonlinear interaction, (2) asymmetric
tidal mixing, (3) varying wind forcing, and (4) chaotic mixing. Some critical issues in modeling studies of fronts are also
addressed. A new unstructured grid, finite-volume coastal ocean ecosystem model is introduced. This model combines the best
of the finite-difference method for the simplest discrete computational efficiency and the finite-element method for geometric
flexibility. Because the finite-volume method discretizes the integral form of the governing equations, this approach provides
a better representation for the conservation laws of mass and momentum are satisfied, which is particularly important in the
frontal regions.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | Numerical modeling frontal dynamics ecosystem tidal mixing finite volume model |
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