HR: 1340h
AN: OS13A-1006 [Abstracts]
TI: Seasonal and Fortnightly Variability of Baroclinic Tides in the Luzon Strait and Northern South China Sea: A Numerical Study
AU: * Ding, C
EM: dingchu35@yahoo.com.tw
AF: Institute of Hydrological and Oceanic Sciences, National Central University, 300 Jung-da
Road, Jung-li, 32001, Taiwan
AU: Jan, S
EM: senjan@ncu.edu.tw
AF: Institute of Hydrological and Oceanic Sciences, National Central University, 300 Jung-da
Road, Jung-li, 32001, Taiwan
AU: Lien, R
EM: lien@apl.washington.edu
AF: Applied Physics Laboratory, University of Washington, 1013 NE 40th Street, Box 355640,
Seattle, WA 98105-6698, United States
AU: Liu, K
EM: kkliu@ncu.edu.tw
AF: Institute of Hydrological and Oceanic Sciences, National Central University, 300 Jung-da
Road, Jung-li, 32001, Taiwan
AB:
The seasonal and fortnightly variations of baroclinic tides in the Luzon Strait and northern South China Sea are
investigated using a three-dimensional tide model driven by four tidal constituents, O1, K1, M2 and S2,
separately. Historical CTD data collected at the South East Asia Time-Serious (SEATS) station are used to
compute vertical profiles of temperature and salinity in summer and winter, which are used as initial conditions
for the present model study. Diurnal and semidiurnal baroclinic tides have a comparable energy flux away from
the Luzon Strait. The barotropic to baroclinic conversion rate is about 30% each. Both east and west ridges are
active in generating baroclinic tides. There appears no significant seasonal variation of the baroclinic tidal energy
flux. Fortnightly variations are strong. Baroclinic tidal energy flux stems from the east ridge in the southern Luzon
Strait and that from the west ridge in the northern Luzon Strait combine and form a strong tidal beam immediately
west of the west ridge. This semidiurnal baroclinic energy flux is likely the energy source of nonlinear internal
waves found in the South China Sea.
DE: 4255 Numerical modeling (0545, 0560)
DE: 4544 Internal and inertial waves
DE: 4560 Surface waves and tides (1222)
SC: Ocean Sciences [OS]
MN: 2007 Fall Meeting