Qi Peng, Wang Aimei
CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences (CAS), Qingdao, 266071, China.
Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China.
Sci Rep. 2020 Dec 17;10(1):22156. doi: 10.1038/s41598-020-79204-2.
The South China Sea (SCS) is a highly semi-enclosed marginal sea located in the East Asian monsoon region. This paper proposes interesting aspects of the unique feature of the SCS waves in response to tropical cyclone's passage when large-scale winter monsoon winds prevail. We use the wave model WaveWatch III to study the wave characteristics of typhoon Durian (2006) passing over the middle of SCS in early December 2006, and state the new understanding acquired in the aspects of the tropical cyclone generated waves in the SCS during winter monsoon surge. In light of this, the role of the large-scale NE monsoon winds on winter typhoon wave field characteristics in the SCS are highlighted by conducting sensitivity experiments with and without the NE monsoon winds. The NE monsoon winds weakly affect the SWH field near the typhoon track and strongly away from the track, especially in the deep water area of the northern SCS where the NE monsoon winds produce high waves. Comparisons between the two experiments show the effect of the NE monsoon winds on the directional wave spectra in the SCS, suggesting that the monsoon-generated swells do not decay and remain throughout the typhoon period.
南海是位于东亚季风区的一个高度半封闭边缘海。本文提出了在大规模冬季季风盛行时，南海海浪对热带气旋过境的独特响应的有趣方面。我们使用波浪模型WaveWatch III来研究2006年12月初榴莲台风（2006）经过南海中部时的波浪特征，并阐述在冬季季风潮期间南海热带气旋生成波浪方面获得的新认识。有鉴于此，通过有和没有东北季风的敏感性实验，突出了大规模东北季风对南海冬季台风波场特征的作用。东北季风对台风路径附近的有效波高场影响较弱，而对远离路径的区域影响较强，特别是在南海北部深水区，东北季风会产生大浪。两个实验的比较显示了东北季风对南海方向波谱的影响，表明季风产生的涌浪不会衰减，并在整个台风期间持续存在。
