Accession Number:

ADA526901

Title:

Observations of Energy Dissipation in the Wake of a Western Pacific Typhoon

Descriptive Note:

Corporate Author:

FLORIDA STATE UNIV TALLAHASSEE DEPT OF OCEANOGRAPHY

Personal Author(s):

Report Date:

2009-01-01

Pagination or Media Count:

7.0

Abstract:

We are focused on understanding small-scale processes that influence the oceans thermodynamic and dynamic properties on the sub-mesoscale scales less than 10 km. This includes the turbulent evolution of cold wakes caused by typhoons, and the subsequent mixing processes the restore the upper ocean stratification after a storm event. I propose to investigate the energy dissipation properties of the mixed layer and mixed-layer base thermocline transition layer during direct forcing by a typhoon. It is hypothesized that inertial energy loss occurs not only through dissipative processes in the mixed layer, but also through dissipation occurring well into the transition layer between the mixed-layer base and the thermocline, where shear is enhanced. Energy is also lost to the thermocline by conversion of inertial energy into near-inertial wave radiation. The turbulence generated at in the transition layer is tied to shear instability occurring below the mixed-layer base, which appears to be a key mechanism in parameterizations for mixedlayer response to strong wind forcing.

Subject Categories:

  • Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE