Accession Number : ADP008751

Title :   Experiments with a Hybrid Statistical Mechanics/Ocean Circulation Model,

Corporate Author : INSTITUTE OF OCEAN SCIENCES SIDNEY (BRITISH COLUMBIA)

Personal Author(s) : Eby, Michael ; Holloway, Gred

Report Date : NOV 1993

Pagination or Media Count : 12

Abstract : A hybrid statistical mechanics/ocean circulation model is tested. A conventional ocean model was revised to include a tendency for model stream-function to relax toward a maximum entropy configuration which depends on the shape of topography. The tendency is called 'topographic stress'. Comparisons are made between three cases; a control case with stream-function relaxation toward rest and two implementations of topographic stress (differing by their functional dependence on total depth). The two topographic stress cases perform similarly, but they differ from the control case in several regards. Topographic stress strengthens equatorward tendencies in deep western boundary currents, sustains a deep Alaska Stream, and leads to poleward eastern boundary undercurrents which are absent in the control. In the upper water column, where direct wind and buoyancy forcing dominate, the influence of topographic stress is slight.

Descriptors :   *OCEAN MODELS, *STATISTICAL MECHANICS, TOPOGRAPHY, OCEAN CURRENTS, EDDIES(FLUID MECHANICS), COMPUTATIONAL FLUID DYNAMICS, SYSTEMS ANALYSIS, CANADA.

Subject Categories : Physical and Dynamic Oceanography
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE