摘要
利用热带气旋路径客观分析方法，将1972—2011年间共131个孟加拉湾热带风暴的移动路径分为3类：西行类（A类）、北行类（B类）和西北行类（C类）。类型A主要生成于孟加拉湾西南部，占全部TS的16％（21次），季节分布为单峰型，主要在秋季，有90％（18次）登陆，登陆点大部分为孟加拉湾海岸西段（85°E以西），有5％达到2级飓风以上强度，对西藏基本没有影响；类型B主要生成于孟加拉湾中部，约占全部TS的56．6％（74次），是主要的风暴移动路径，呈双峰型季节分布，是春季Ts的主要路径类型，有91％（67次）登陆，登陆点大部分为盂加扎湾海岸中段（85～95°E），有19％达到2级飓风以上强度，对西藏影响最大，是造成西藏强降水的主要TS路径类型；类型C主要生成于孟加拉湾南部，约占全部Ts的27．5％（36次），主要形成于秋季，是冬季Ts的主要路径类型，有64％（23次）登陆，大部分在西段登陆，持续时间较长，对西藏影响很小。
Using the objective clustering method of tropical cyclones, 131 tropical storms over the Bay of Bengal from 1972 to 2011 are classified to three types： westward-moving type A, northward-moving type B, and northwestward-moving type C. The TSs in type A mainly generate over the southwest part of the bay, accounting for 16% （21） of all TSs over the bay, showing an annual single-peak distribution, mainly in autumn, and 90% of them （18 TSs） make landfall, most of which on the southern coast of the bay and only 5% achieves Hurricane 2 category, having little effect on Tibet. The TSs in type B mostly generate over the middle part of the bay, accounting for 56.6% （74） of all TSs over the bay. Annually, they appear in twin peaks in both autumn and spring and 91% of them make landfall, with most of the landfalls located in the middle coast of the bay. Being the main type of track influencing Tibet, the TSs in type B have strong impacts on the weather there. All of the TSs in type C generate over the southern part of the bay, accounting for 27.5% （36） of all TSs there. They appear in annual single peak from autumn to early winter. Most of the winter TSs are classified as type C and 64% of them make landfall, with most of the landfalls located at the southern coast of the bay. The TSs of type C rarely affect the weather of Tibet.
出处
《热带气象学报》
CSCD
北大核心
2013年第6期973-983,共11页
Journal of Tropical Meteorology
基金
公益事业行业专项(GYHY201106005)
中国气象局新技术推广项目(CMATG2010M25)共同资助
关键词
孟加拉湾
热带风暴
风暴路径
客观分类
西藏高原
Bay of Bengal
tropical storm
storm tracks
objective clustering method
Tibet
