Observational Analysis of Tropical Cyclone Formation Associated with Monsoon Gyres
Observational Analysis of Tropical Cyclone Formation Associated with Monsoon Gyres
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DOI：
10.1175/jas-d-12-0117.1
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发表时间：
2013-04
影响因子：
3.1
通讯作者：
Liguang Wu;Huijun Zong;Jia-yi Liang
中科院分区：
文献类型：
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作者：
Liguang Wu;Huijun Zong;Jia-yi Liang
摘要西北太平洋上的大尺度季风环流和与之相关的热带气旋形成在以往的研究中已有记载。本研究的目的是了解季风环流如何影响热带气旋的形成。对2000-10年季风环流进行了观测研究，分析了季风环流的结构特征及其与热带气旋生成的关系，2000-10年5 - 10月共发现37个季风环流，其中31个季风环流伴随42个热带气旋生成，占热带气旋生成总量的19.8%。季风环流一般位于复合季风槽的极向一侧，高峰出现在8 - 10月。低层由中心向外延伸约1000 km，合成季风环流的气旋性环流随高度减小，在200 hPa以上被负相对涡度所取代。合成季风环流的最大风速出现在...
AbstractLarge-scale monsoon gyres and the involved tropical cyclone formation over the western North Pacific have been documented in previous studies. The aim of this study is to understand how monsoon gyres affect tropical cyclone formation. An observational study is conducted on monsoon gyres during the period 2000–10, with a focus on their structures and the associated tropical cyclone formation.A total of 37 monsoon gyres are identified in May–October during 2000–10, among which 31 monsoon gyres are accompanied with the formation of 42 tropical cyclones, accounting for 19.8% of the total tropical cyclone formation. Monsoon gyres are generally located on the poleward side of the composited monsoon trough with a peak occurrence in August–October. Extending about 1000 km outward from the center at lower levels, the cyclonic circulation of the composited monsoon gyre shrinks with height and is replaced with negative relative vorticity above 200 hPa. The maximum winds of the composited monsoon gyre appear ...