Accession Number:

ADA609805

Title:

Theoretical and Numerical Studies of Variability and Predictability in an Unsteady Ocean

Descriptive Note:

Annual rept.

Corporate Author:

PRINCETON UNIV NJ

Personal Author(s):

Report Date:

2000-09-30

Pagination or Media Count:

4.0

Abstract:

Our long-term goals are to understand the nature of variability within the ocean, in particular that due to the motion of mesoscale eddies and their interaction with and dependence on the general circulation. Our particular objectives are to understand the nature and predictability of mesoscale eddies in the ocean. This includes the mechanisms of their equilibration, their structure and energetics, and their dependence on the large-scale parameters set by the general circulation. Our approach is to use a hierarchy of numerical and analytic models of the ocean circulation, of varying complexity. At the simplest level are linear quasi-geostrophic models of baroclinic instability. At the next level are nonlinear, eddy resolving quasi-geostrophic models in idealized domains. Finally, we employ eddy resolving primitive equation models in fairly realistic configuration and domain. We have completed a sequence of integrations using a quasigeostrophic model to explore the equilibration properties of mesoscale eddies, with oceanically realistic stratification. In collaboration with GFDL scientists we have configured two primitive equation numerical models to perform eddy resolving integrations of the Southern Ocean, and some preliminary experiments have been performed.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Numerical Mathematics
  • Theoretical Mathematics
  • Statistics and Probability
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE