Efiect of surface waves on air-sea momentum fiux in high wind conditions for typhoons in the South China Sea  

作　　者：Liangming Zhou Aifang Wang Peifang Guo Zhifeng Wang 

机构地区：[1]Physical Oceanography Laboratory, Ocean University of China, 238 Songling Road, Qingdao 266100, China [2]Engineering Reconnaissance and Design Institute, Ocean University of China, Qingdao 266071, China

出　　处：《Progress in Natural Science:Materials International》2008年第9期1107-1113,共7页自然科学进展·国际材料（英文版）

摘　　要：The WAVEWATCH-III wave model is implemented in the South China Sea to investigate the air-sea momentum flux in high wind conditions during 23 passages of typhoon occurred in 2005. The wave model is driven by the reanalyzed surface winds assimilated by several meteorologic data sources. The friction velocity was calculated and the relationships between different air-sea momentum param- eters were studied. The results show that the drag coefficient decreases with the wave age generally and levels off for wind speeds higher than 35 m/s under typhoon wind forcing. The spatial variations of air-sea momentum flux parameters in high wind conditions forced by typhoons are completely different from those at weak wind speeds and significantly depend on the relative position from the typhoon center.The WAVEWATCH-Ⅲ wave model is implemented in the South China Sea to investigate the air-sea momentum fiux in high wind conditions during 23 passages of typhoon occurred in 2005.The wave model is driven by the reanalyzed surface winds assimilated by several meteorologic data sources.The friction velocity was calculated and the relationships between difierent air-sea momentum param-eters were studied.The results show that the drag coeficient decreases with the wave age generally and levels ofi for wind speeds higher than 35 m/s under typhoon wind forcing.The spatial variations of air-sea momentum fiux parameters in high wind conditions forced by typhoons are completely difierent from those at weak wind speeds and significantly depend on the relative position from the typhoon center.

关 键 词：Drag coefficient Charnock coefficient Wave age TYPHOON WAVEWATCH-III 

分 类 号：P44[天文地球—大气科学及气象学]