Center for Environmental and Applied Fluid Mechanics




.
Weekly Seminar
Home
Weekly Seminar

Annual Symposium
CEAFM Dual Degree Program
Members
Contact

Weekly Seminar: Spring 2008

Date: April 25
Time: 11:00 AM
Location: Maryland Hall 110
Speaker: Dr. Balasubramanya Nadiga
Los Alamos National Laboratory
Title:"Eddy Fluxes in Geostrophic Turbulence"

Abstract

Given its importance in parameterizing eddies, the orientation of eddy flux of potential vorticity in geostrophic turbulence is considered. A classical ensemble- or time-average point of view and a second scale-decomposition point of view are considered. In either approach, a net alignment of the eddy flux of potential vorticity with the appropriate mean gradient or the large-scale gradient of potential vorticity is required. This alignment is, however, found to be very weak. A key finding of the study is that in the scale decomposition approach, there is strong correlation between the eddy-flux and a nonlinear combination of resolved gradients. This strong correlation is absent in the classical decomposition. This finding points to a new model to parameterize the effects of eddies in global ocean circulation. Elements of Temporal Eulerian Mean and Temporal Residual Mean theories will be considered.








Upcoming Seminar

Dr. ...
September 12th, 2008
11:00 a.m.
Maryland Hall 110
"????"

More information »