Analysis of wave field caused by tropical cyclone in the Bay of Bengal

Abstract

Abstract: The wave field caused by tropical cyclone “Thane” in the Bay of Bengal during December 2011 was simulated by using WW3(WAVEWATCH-Ⅲ) wave model with CCMP (Cross-Calibrated, Multi-Platform) wind data as the driving field. Results show that: (1) With CCMP wind data as the driving field, the WW3 wave model can simulate the wave field caused by tropical cyclone “Thane” properly. The simulated SWH (significant wave height) has good consistent with the observed SWH. Simulated value is slightly smaller than observed value when the SWH is smaller than 2 meters or larger than 5 meters. The simulated value is slightly greater than observed value when the SWH is between 2 meters and 5 meters. (2) There are some differences between wind field and wave field caused by tropical cyclone “Thane”. The gale district distributes more evenly around the cyclone. When the cyclone is in the middle of the ocean, big wave areas mainly distribute in the right semicircle, and big wave areas mainly distribute in the front of the cyclone in offshore. (3) During tropical cyclone “Thane”, the wave direction has good consistency with the wind direction except the second quadrant. In the second quadrant, the wind direction is northwest, but the wave direction is north.

Key words: WAVEWATCH-Ⅲ wave model, CCMP wind field, Bay of Bengal, tropical cyclone

CLC Number:

P731.22

ZHENG Chong-wei, LIN Gang, SHAO Long-tan. Analysis of wave field caused by tropical cyclone in the Bay of Bengal[J]. Journal of Marine Sciences, 2013, 31(4): 26-31.

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