气象学报2011，Vol.69Issue(6)：990-1000,11.
季风槽内热带气旋生成的基本特征分析
Characteristics of the tropical cyclogenesis in the summer monsoon trough
摘要
Abstract
By using the tropical cyclone (TC) data from the Joint Typhoon Warning Center (JTWC) , the tropical disturbance (DB) alert messages from University of Illinois, the Geostationary Meteorological Satellite TBB data, the QuikSCAT oceanic wind data and the NCEP final reanalysis wind data, the statistics of TCs that form in the summer monsoon trough (MTC for short) is made, and the chief patterns of the monsoon trough associated with the tropical cyclogenesis are discussed. The paper further analyzes the characteristics of the tropical cyclogenesis within every pattern of the monsoon troughs and the features of the mesoscale convective systems (MCS) which occur 48 hours prior to the MTC formation. The main conclusions are as follows: (1) The percentage of the MTCs to all the TCs is about 71% and the MTC can easily further develop into the tropical storm or typhoon. The probability of the DB in the monsoon trough that can develop into the tropical depression is much higher than that in the non-monsoon trough. (2) There are five chief monsoon trough patterns that are associated with the tropical cyclogenesis and they are the SCS-NWP pattern, NWP pattern, Reverse-Oriented (RO) pattern, Late-Season (LS) pattern and SCS pattern, respectively. The TCs that effect China come mainly from the SCS-NWP pattern, NWP pattern and SCS pattern. The developmental probability of the DB in the RO pattern is the highest, but it is the lowest in the LS pattern. (3) The cluster of MTCs is the main way of the MTC formation. The SCS-NWP pattern is the most important pattern for the cluster of MTCs, while the cluster of MTCs can very easily occur in the RO pattern. (4) During the process of MTC formation, there are usually more than two MCSs near the MTC formation position during 48 hours prior to the MTC formation. The large-scale cloud clusters of the monsoon trough can organize MCSs frequently; the period during which the MCSs are active is just the process that the DB transfers into the tropical depression. Especially when the monsoon trough is very strong, the MCSs are so active that the cluster of MTC can easily occur.关键词
热带气旋生成/季风槽/群发/热带扰动/中尺度对流系统Key words
Tropical cyclongenesis/Monsoon trough/Group-occurring/Tropical disturbance/MCS分类
天文与地球科学引用本文复制引用
吕心艳,端义宏..季风槽内热带气旋生成的基本特征分析[J].气象学报,2011,69(6):990-1000,11.基金项目
973项目(2009CB421506)、国家自然科学基金(40905028、40975035). （2009CB421506）
