https://scholars.lib.ntu.edu.tw/handle/123456789/606308
標題: | Tropical cyclone formation within strong northeasterly environments in the south china sea | 作者: | Lin Y.-L Teng H.-F Hsieh Y.-H CHENG-SHANG LEE |
關鍵字: | Environmental conditions;Late season;South china sea;Tropical cyclone formation;Winter northeasterly monsoon flow;Hurricanes;Storms;Tropics;Convective instabilities;South China sea;Tropical cyclone;Weather research and forecasting models;Weather forecasting;computer simulation;environmental conditions;monsoon;tropical cyclone;weather forecasting;winter;Pacific Ocean;South China Sea | 公開日期: | 2021 | 卷: | 12 | 期: | 9 | 來源出版物: | Atmosphere | 摘要: | In the South China Sea (SCS), 17% of tropical cyclones (TCs) formed in the late season (November?January) were associated with a strong northeasterly monsoon. This study explores the effects of northeasterly strength on TC formation over the SCS. The Weather Research and Forecasting (WRF) model is used to simulate the disturbances that develop into TCs (formation cases) and those that do not (non-formation cases). Two formation (29W on 18 November 2001 and Vamei on 26 December 2001) and two non-formation (30 December 2002 and 9 January 2003) cases are simulated. To address the importance of upstream low-level northeasterly strength to TC formation, two types of sensitivity experiments are performed: formation cases with increased northeasterly flow and non-formation cases with decreased northeasterly flow. If the strength of the northeasterly is increased for the formation case, the stronger cold advection reduces the convective instability around the disturbance center, leading to the weakening of the simulated disturbance. If the strength of the northeasterly is decreased for the non-formation case, the simulated disturbance can develop further into a TC. In summary, strength of the upstream low-level northeasterly flow does affect the environmental conditions around the disturbance center, resulting in the change of TC formation probability over the SCS in the late season. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114691025&doi=10.3390%2fatmos12091147&partnerID=40&md5=f7cf40dd9df385196f0ba3da126124a9 https://scholars.lib.ntu.edu.tw/handle/123456789/606308 |
ISSN: | 20734433 | DOI: | 10.3390/atmos12091147 |
顯示於: | 大氣科學系 |
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