Frontal Evolution in Layered Models: Mixed Layer Dynamics and the Stability of Forced Fronts.
Abstract
The study of evolving unstable fronts in the ocean was the focus of this work. Several approaches have been taken. The cross-front structure in a mean sense was studied in several different ways, first with a quasi-two-dimensional model where the influence of Ekman layers on the evolving front was explored. Second, an adiabatic isopycnal model was used to explore the equilibration of a baroclinically unstable front and the net exchange of mass and fluid parcels across the mean jet both at small and finite amplitude. In addition, the quasi-geostorphic approximation was tested in this context and found to be a good predictor of flow at finite amplitude, baring an asymmetry in cross-frontal structure that appears when the Rossby number gets big. Mixed-layer models in the context of baroclinically unstable fronts were also explored, in particular the evolution of a mixed-layer front in the presence of forcing. In this case, an asymmetry appears because of the forcing. The mixed-layer model was coupled to the adiabatic model and additional application of the couple model is being explored.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 28, 1997
- Accession Number
- ADA331143
Entities
People
- LuAnne Thompson
Organizations
- University of Washington