HR: 14:20h
AN: OS23E-03    [Abstracts]
TI: Forcing a Three-Dimensional, Hydrostatic Primitive-Equation Model for Application in the Surf Zone.
AU: * Newberger, P A
EM: newberg@coas.oregonstate.edu
AF: College of Oceanic and Atmospheric Sciences, Oregon State University 104 COAS Admin Bldg, Corvallis, OR 97331-5503 United States
AU: Allen, J S
EM: jallen@coas.oregonstate.edu
AF: College of Oceanic and Atmospheric Sciences, Oregon State University 104 COAS Admin Bldg, Corvallis, OR 97331-5503 United States
AB: A hydrostatic primitive equation model, the Princeton Ocean Model (POM), has been adapted for studies of three-dimensional, wave-averaged circulation in the nearshore surf zone. As part of the NOPP Nearshore Modeling program, POM has been embedded as a subroutine in the community model (NearCoM) master program. Here we examine the influence of the waves on the circulation with emphasis on the three-dimensional aspects of the forcing. The surf zone wave-averaged circulation is forced primarily by the gradients of the radiation stress tensor that arise from the breaking waves. Traditionally, modeling of surf zone currents has used the shallow water (horizontally two-dimensional) approximation. Forcing a fully three-dimensional model such as POM requires that the depth dependence of these forces be examined. Additional wave-current interaction forcing terms not usually included in radiation stress forcing of shallow-water circulation models and the effect of rotation on the wave induced circulation are also important issues for combined nearshore/coastal circulation models. Here we examine the three-dimensional wave force formulation applicable to the surf zone and some of the implications for three-dimensional surf zone modeling.
DE: 4255 Numerical modeling
DE: 4546 Nearshore processes
DE: 4560 Surface waves and tides (1255)
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting