HR: 0830h
AN: OS41A-03    [Abstracts]
TI: Ambient Hydrographic Effects on the Generation and Propagation of Tidally-Driven Internal Bores and Solitons
AU: * Piacsek, S A
EM: piacsek@nrlssc.navy.mil
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: Warn-Varnas, A
EM: varnas@nrlssc.navy.mil
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: Martin, P
EM: martin@nrlssc.navy.mil
AF: Naval Research Laboratory, Code 7322, Stennis Space Center, MS 39529 United States
AU: Smolarkiewicz, P
EM: smolar@ncar.ucar.edu
AF: National Center for Atmospheric Research, NCAR/MMM , P.O.Box 3000, Boulder, CO 80307 United States
AB: The effects of different initial hydrographic representations on the numerical simulations of internal bore and soliton generation and propagation were studied. The initial set of experiments were carried out in the Luzon Strait and the eastern part of the South China Sea using nonhydrostatic models. Internal wave generation was forced by the barotropic tide passing over the sills between islands and south of Taiwan in the Strait. Horizontally homogeneous initial density profiles were derived, via analytical approximations, from three sources: (1) the 2001 Levitus monthly, 1/4 deg climatology; (2) a set of 694 CTD observations collected between April and July of 2001, and (3) numerical simulations for the period of the observations. To obtain high resolution 3-D simulations, only subregions of the Luzon Strait/South China Sea area were considered, with focus on regions in the 118E-122E and 18.5N-22.5N geographic domain. Model resolutions varied from 50m to 1 km in the horizontal and 25m to 100m in the vertical. The choice of temperature and salinity profiles, and the resulting density profile, affected the numerical convergence of the iterations in the model. In addition, the amplitude of the generated internal bores and their propagation were also affected.
DE: 1724 Ocean sciences
DE: 2447 Modeling and forecasting
DE: 3210 Modeling
DE: 3220 Nonlinear dynamics
DE: 4259 Ocean acoustics
SC: Ocean Sciences [OS]
MN: 2005 Joint Assembly