Accession Number : ADA324887

Title :   A Mixed Layer Model with Surface Wave Forcing.

Descriptive Note : Final rept. 1 Jan 95-31 Dec 96,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA

Personal Author(s) : Plueddemann, Albert J. ; Weller, Robert A. ; Price, James F.

PDF Url : ADA324887

Report Date : 30 APR 1997

Pagination or Media Count : 6

Abstract : This work was motivated by the desire to develop a mixed layer model which more successfully parameterized the principal physical processes responsible for mixing. The goal was improved prediction of the short-term (days to weeks) evolution of upper ocean vertical structure. Analysis of recent observations (Weller and Plueddemann, 1996; Gnanadesikan, et al., submitted) indicated that traditional mixed layer models performed poorly during periods immediately following strong wind events, when local winds were low but waves persisted. During these low-wind periods a one dimensional mixed layer model predicted rest ratification in response to solar heating. However, observations showed that Langmuir cells persisted for up to one day after the end of the wind forcing (Plueddemann, 1996), redistributing the heat from the penetrating shortwave radiation, and keeping the surface layer mixed. Since existing mixed layer models do not include surface waves as a part of the forcing, they cannot account for wave-current interaction, Laugmuir circulation, or the subsequent effects on mixed layer development. We intended to incorporate these effects in a model by adding the surface wave Stokes drift to the forcing and parameterizing mixing due to Langmuir circulation. This objective was modified in the course of the project as described below.

Descriptors :   *SURFACE WAVES, *MIXED LAYER(MARINE), LAYERS, WIND, DRIFT, OCEAN MODELS, SOLAR HEATING.

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE