2004 LOM Workshop

Wednesday 1:30 - 1:50 p.m.

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Upper ocean response to Hurricane Isabel

Ilya Rivin, Carlos Lozano, Dan Iredell, D. B. Rao
NCEP
ilya.rivin@noaa.gov

ABSTRACT

Oceanic upper layer response to the passage of the Hurricane Isabel is examined using 1/12 degree Mercator HYCOM for the North Atlantic. We employ GISS parameterization for vertical mixing. The model is initialized from the Navy Research Laboratory nowcast for September 2, 2003 and forced by the NCEP Global Forecast System (GFS) analyses. The simulation results are compared with the observed data. The analysis is performed for three time periods: "pre-hurricane" (before hurricane passage), "hurricane", and "relaxation" after the hurricane land fall. Entrainment fluxes, deepening of the ocean mixed layer and currents response to the passing hurricane are analyzed.

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LOM Users' Workshop, February 9-11, 2004