Analysis of significant wave heights from WWATCH and TOPEX/Poseidon Altimetry
QI Yi-quan, Peter C. CHU, SHI Ping, MAO Qing-wen, FAN Chen-wu (1. LED, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, Cnina; 2. Naval Postgraduate School, Monterey, CA, 93940, USA)
A full-spectral third-generation ocean wind-wave model WAVEWATCH Ⅲ (henceforth denoted as WWATCH), which has been developed at the Ocean Modeling Branch (OMB) of the Environmental Modeling Center (EMC) of the National Centers for Environmental Prediction (NCEP), is used to simulate the wind wave during the year 1996 with wind input of NCEP re-analysis data 4 times daily in the South China Sea (SCS). The significant wave heights(SWH) from WWATCH model and TOPEX/Poseidon (T/P) altimetric data are compared over the crossover points in the SCS for the year 1996, and the wind speeds from NCEP re-analysis data and T/P data are also compared to help analyze the results from the WWATCH model. The temporal variation of SWHs from WWATCH is generally consistent with that from T/P, and the maximum differences between SWHs from WWATCH and T/P occur in low wind speed during summer monsoon especially. The spatial consistency of SWHs from WWATCH and T/P in center areas is better than that close to the model boundary.