HR: 0800h
AN: OS51A-08    [Abstracts]
TI: Vorticity Generation and Evolution in the Shallow-Water Island Wake
AU: * Dong, C
EM: cdong@atmos.ucla.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90034, United States
AU: McWilliams, J
EM: jcm@atmos.ucla.edu
AF: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90034, United States
AB: To investigate the mechanism of vorticity generation and evolution in the wake of an island with shelf slope, Regional Oceanic Model System (ROMS) is applied. An idealized island shape with shelf slope is configured with a stratified and rotating flow passing the island. Numerical results show that the mechanism of eddy generation in the wake of the island with the shelf slope is different from our previous study of deep-water island wake: uneven-distributed bottom viscous stress becomes import in the eddy generation, associated with vortex stretching and baroclinic vertical tilting. To isolate the bottom stress from baroclinic vertical tilting, slippery bottom is used in a paralleling numerical experiment. More detailed analysis of the numerical experiments will be presented in the presentation.
DE: 4512 Currents
DE: 4520 Eddies and mesoscale processes
DE: 4568 Turbulence, diffusion, and mixing processes (4490)
SC: Ocean Sciences [OS]
MN: 2007 Joint Assembly