Bimodality and growth of the spectra of typhoon-generated waves in northern South China Sea

IOCAS-IR

	Bimodality and growth of the spectra of typhoon-generated waves in northern South China Sea
	Dongxue Mo ; Yahao Liu ; Yijun Hou ; Ze Liu
发表期刊	Acta Oceanologica Sinica
ISSN	0253-505X
	2019-11-15
出版年	2019
卷号	v.38 期号:11 页码:74-84
文献类型	CNKI期刊论文
摘要	Buoy-based observations of wave spectra during the passage of three typhoons in the northern South China Sea are examined. Though most spectra of mature typhoon-generated waves are unimodal, double-peaked spectra account for a significant proportion during the growing and decaying stages. This is due either to the superposition of swells on local wind waves or to the mechanism of nonlinear interaction between different wave components. The growth rate of energy density is an effective way to predict spectrum variation. The dominant wave direction depends on the location of the typhoon center to the site, but the direction spread shows no regularity in distant regions. In this study, a new six-parameter spectral formula is proposed to represent doublepeaked spectra and is shown to provide a better fit than previous models. The theoretical relationship between shape parameter and spectral width is still applicable to each peak. The characteristics of the variations of spectral parameters are analyzed. It is demonstrated that the spectral parameters are not only related to the typhoon intensity and typhoon track, but also have strong intercorrelations. Moreover, the growth relation between significant wave height and significant wave period is obtained to fit the typhoon-generated waves.
关键词	double peak South China Sea spectral parameters typhoon wave spectrum
CNKI专辑号	A;C;
CNKI专辑名称	基础科学;工程科技Ⅱ辑;
CNKI专题号	A009;A010;C037;
CNKI专题名称	气象学;海洋学;水利水电工程;
分类号	P731.22;P732.3
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	The National Natural Science Foundation of China under contract No.U1706216 ; the National Key Research and Development Program of China under contract Nos 2016YFC1402000 and 2018YFC1407003 ; the National Natural Science Foundation of China under contract Nos 41406017,U1406402 and 41421005 ; the CAS Strategic Priority Project under contract Nos XDA19060202and XDA19060502
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/188406
专题	中国科学院海洋研究所
作者单位	1.CASKeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.LaboratoryforOceanDynamicsandClimate,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 3.UniversityofChineseAcademyofSciences 4.CenterforOceanMega-Science,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Dongxue Mo,Yahao Liu,Yijun Hou,et al. Bimodality and growth of the spectra of typhoon-generated waves in northern South China Sea. 2019.