Accession Number:

ADA537906

Title:

Analysis of Scale Separation Procedures

Descriptive Note:

Annual rept.

Corporate Author:

HAWAII UNIV HONOLULU DEPT OF OCEANOGRAPHY

Personal Author(s):

Report Date:

1998-01-01

Pagination or Media Count:

4.0

Abstract:

Improving the parameterization of subgrid-scale motions in oceanic general circulation models. Establish the fraction of subgrid-scale motions that is caused by propagating remotely forced waves, especially wind forced Rossby waves. Standard parameterization schemes eddy diffusion, eddy induces transport velocities assume that the subgrid scale fluxes are determined by local mean flow quantities. For propagating remotely forced waves this assumption becomes inadequate and non-local and perhaps stochastic parameterization schemes need to be developed. Theoretical analysis and numerical calculation of the oceanic Rossby wave response to wind forcing and comparison with observations. The theoretical analysis is based on the linear quasi-geostrophic potential vorticity equation with idealized geometry and forcing. The numerical calculations use a 1-12 layer reduced gravity model. Observations are drawn primarily from BEMPEX Barotropic Electromagnetic and Pressure Experiment and TOPEXPOSEIDON.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Numerical Mathematics
  • Electricity and Magnetism
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE