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Horizontal variations of typhoon-forced near-inertial oscillations in the south China sea simulated by a numerical model
Xu, Jiexin; Huang, Yandan1; Chen, Zhiwu; Liu, Junliang; Liu, Tongya2,3; Li, Juan1; Cai, Shuqun4; Ning, Dezhi5
2019
Source PublicationCONTINENTAL SHELF RESEARCH
ISSN0278-4343
Volume180Pages:24
AbstractHorizontal variations of near-inertial oscillations (NIOs) in the northeastern South China Sea after the passage of typhoon Kalmaegi were investigated by using a three-dimensional Price-Weller-Pinkel (3DPWP) model. The 3DPWP model was modified by considering simple viscosity terms and the real topography to better simulate the typhoon-forced NIOs. The model results can generally match the observations. According to the model results, the horizontal structure of typhoon-forced NIOs is somewhat like a series of ellipses propagating northwestward with their centers parallel to the track of typhoon. The order of near-inertial wavelength is about 500 km. On the left side of the track, the near-inertial kinetic energy (NIKE) is weak and decreases quickly with distance. However, on the right side, NIKE increases from center of typhoon, gets the maximum at about one and a half radius of maximum wind speed (R-max), and then decreases quickly. Several sensitivity experiments were designed to investigate the effect of R-max, the maximum wind speed (V-max) and the moving velocity of typhoon (U-m) on NIOs. As R-max. increases, the influence scope of NIOs narrows, whilst increases of V-m and U-m tend to enlarge the influence scope. When three parameters increase by 10%, the corresponding NIKE increases by 18%, 38% and 19%, respectively, revealing that Vmax has the most effect. The moving of typhoon is a major reason for horizontal propagation of NIOs. When typhoon is stationary, the time-averaged and depth-integrated NIKE is about only 3.5% of the total kinetic energy input by typhoon, and the induced NICs are much less than those induced by a moving typhoon.
DepartmentLTO
KeywordNear-inertial oscillation Near-inertial kinetic energy Wave propagation Typhoon Model South China sea
DOI10.1016/j.csr.2019.05.003
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17716
Collection热带海洋环境国家重点实验室(LTO)
Affiliation1.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Zhejiang Univ, Ocean Coll, Zhoushan 316021, Peoples R China
4.Second Inst Oceanog, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China
5.Chinese Acad Sci, Inst South China Sea Ecol & Environm Engn, Guangzhou 510301, Guangdong, Peoples R China
6.Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian 116024, Peoples R China
Recommended Citation
GB/T 7714
Xu, Jiexin,Huang, Yandan,Chen, Zhiwu,et al. Horizontal variations of typhoon-forced near-inertial oscillations in the south China sea simulated by a numerical model[J]. CONTINENTAL SHELF RESEARCH,2019,180:24, 34.
APA Xu, Jiexin.,Huang, Yandan.,Chen, Zhiwu.,Liu, Junliang.,Liu, Tongya.,...&Ning, Dezhi.(2019).Horizontal variations of typhoon-forced near-inertial oscillations in the south China sea simulated by a numerical model.CONTINENTAL SHELF RESEARCH,180,24.
MLA Xu, Jiexin,et al."Horizontal variations of typhoon-forced near-inertial oscillations in the south China sea simulated by a numerical model".CONTINENTAL SHELF RESEARCH 180(2019):24.
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