Accession Number : ADA300401

Title :   Modeling of Coastal Ocean Flow Fields.

Descriptive Note : Final technical rept.,

Corporate Author : OFFICE OF NAVAL RESEARCH ARLINGTON VA

Personal Author(s) : Allen, John S.

PDF Url : ADA300401

Report Date : MAR 1995

Pagination or Media Count : 4

Abstract : In Allen, Samelson, and Newberger (1991), we demonstrate the existence of a chaotic invariant set of solutions of an idealized model for wind-forced guasi-geostrophic flow over a continental margin with variable bottom topography. For weak (constant plus time-periodic) forcing and weak friction, we apply a recent extension (Wiggins and Holmes, 1987) of the method of Melnikov (1963) to test for the existence of transverse homoclinic orbits in the model. We find that in the presence of constant positive wind stress Tau sub 0 (equatorward on eastern ocean boundaries) chaotic solutions exist when the ratio of an oscillating wind stress Tau sub 1 to the bottom friction parameter is above a critical value that depends on Tau sub 0/r and the bottom topographic height. Research was continued on the development of intermediate models for the study of subinertial frequency mesoscale motion in stratified shelf, slope, and adjacent interior ocean flow fields. Intermediate models are derived under the assumption that the Rossby number epsilon is small. (MM)

Descriptors :   *COASTAL REGIONS, *OCEAN CURRENTS, *OCEAN MODELS, OCEAN WAVES, DISTRIBUTION, CHAOS, WIND, FLOW FIELDS, AIR WATER INTERACTIONS, GEOSTROPHIC CURRENTS, OCEAN BOTTOM TOPOGRAPHY, GRAVITY WAVES.

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE