Variations in High-frequency Oscillations of Tropical Cyclones over the Western North Pacific
Chen, SM; Li, WB; Wen, ZP; Zhou, MS; Lu, YY; Qian, YK; Liu, HY; Fang, R; eeslwb@mail.sysu.edu.cn
2018
发表期刊ADVANCES IN ATMOSPHERIC SCIENCES
卷号35期号:4页码:423-434
摘要Variations in the high-frequency oscillations of tropical cyclones (TCs) over the western North Pacific (WNP) are studied in numerical model simulations. Power spectrum analysis of maximum wind speeds at 10 m (MWS10) from an ensemble of 15 simulated TCs shows that oscillations are significant for all TCs. The magnitudes of oscillations in MWS10 are similar in the WNP and South China Sea (SCS); however, the mean of the averaged significant periods in the SCS (1.93 h) is shorter than that in the open water of the WNP (2.83 h). The shorter period in the SCS is examined through an ensemble of simulations, and a case simulation as well as a sensitivity experiment in which the continent is replaced by ocean for Typhoon Hagupit (2008). The analysis of the convergence efficiency within the boundary layer suggests that the shorter periods in the SCS are possibly due to the stronger terrain effect, which intensifies convergence through greater friction. The enhanced convergence strengthens the disturbance of the gradient and thermal wind balances, and then contributes to the shorter oscillation periods in the SCS.
部门归属[Chen, Shumin; Li, Weibiao; Wen, Zhiping; Zhou, Mingsen; Liu, Haoya; Fang, Rong] Sun Yat Sen Univ, Sch Atmospher Sci, Ctr Monsoon & Environm Res, Guangdong Prov Key Lab Climate Change & Nat Disas, Guangzhou 510275, Guangdong, Peoples R China; [Zhou, Mingsen] China Meteorol Adm, Guangzhou Inst Trop & Marine Meteorol, Guangzhou 510062, Guangdong, Peoples R China; [Lu, Youyu] Fisheries & Oceans Canada, Bedford Inst Oceanog, Dartmouth, NS B2Y 4A2, Canada; [Qian, Yu-Kun] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
关键词Tropical Cyclone High-frequency Oscillation Western North Pacific South China Sea
学科领域Meteorology & Atmospheric Sciences
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17085
专题热带海洋环境国家重点实验室(LTO)
通讯作者eeslwb@mail.sysu.edu.cn
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Chen, SM,Li, WB,Wen, ZP,et al. Variations in High-frequency Oscillations of Tropical Cyclones over the Western North Pacific[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2018,35(4):423-434.
APA Chen, SM.,Li, WB.,Wen, ZP.,Zhou, MS.,Lu, YY.,...&eeslwb@mail.sysu.edu.cn.(2018).Variations in High-frequency Oscillations of Tropical Cyclones over the Western North Pacific.ADVANCES IN ATMOSPHERIC SCIENCES,35(4),423-434.
MLA Chen, SM,et al."Variations in High-frequency Oscillations of Tropical Cyclones over the Western North Pacific".ADVANCES IN ATMOSPHERIC SCIENCES 35.4(2018):423-434.
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