HR: 1330h
AN: OS43A-06    [Abstracts]
TI: A Hindcast Experiment Nesting a Baroclinic West Florida Shelf Model in the 1/12th Degree Operational North Atlantic HYCOM Model
AU: * Barth, A
EM: abarth@marine.usf.edu
AF: USF, College of Marine Science, 140 7th Avenue South, St. Petersburg, FL 33701 United States
AU: Alvera-Azcárate, A
EM: aalvera@marine.usf.edu
AF: USF, College of Marine Science, 140 7th Avenue South, St. Petersburg, FL 33701 United States
AU: He, R
EM: ruoying@whoi.edu
AF: Woods Hole Oceanographic Institution, Bigelow 315B, Mail Stop 10, Woods Hole, MA 02543 United States
AU: Helber, R W
EM: helber@marine.usf.edu
AF: USF, College of Marine Science, 140 7th Avenue South, St. Petersburg, FL 33701 United States
AU: Weisberg, R H
EM: weisberg@marine.usf.edu
AF: USF, College of Marine Science, 140 7th Avenue South, St. Petersburg, FL 33701 United States
AB: We have been experimenting with various baroclinic modeling systems, including POM, ROMS, and FVCOM to determine the responses of the West Florida Shelf (WFS) to local forcing. Here we consider a hindcast experiment in which a WFS ROMS model is nested in the 1/12th degree operational North Atlantic HYCOM model for the purpose of investigating the effects of deep-ocean forcing on the WFS. Temperature, salinity and velocity boundary values are extracted from the operational 1/12th degree HYCOM model, and near the boundary the ROMS solution is nudged towards the HYCOM fields with a relaxation weight that decreases to zero in the interior of the WFS ROMS domain. Two model runs, each starting in July 2004 and forced with NCEP and NOGAPS products, respectively, are shown in hindcast mode and compared to observations. Due to hurricanes affecting the WFS, the model is sensitive to the surface drag coefficient formulation. For these extreme wind events the formulation of Kondo (1975) produces better results than the parameterization of Fairall (1996).
DE: 4255 Numerical modeling
DE: 4263 Ocean prediction
DE: 9325 Atlantic Ocean
SC: Ocean Sciences [OS]
MN: 2005 Joint Assembly