中文摘要：

用从 1979～2005 的 NCEP/DOE AMIP-分析数据和在西方的诺思太平洋的季风马槽的特征的每日的一般水准，我们证实一个紧张索引和一个地点索引在在那里产生的热带气旋( MTTC )上在三个不同区域和他们的影响描述季风马槽的活动季风马槽的 .The 行为是 analyzed.The 追随者结论被获得:( 1 )确定的季风马槽紧张索引有一积极 correlatio

英文摘要：

Using the daily average of the NCEP/DOE AMIP-II reanalysis data from 1979 to 2005 and the characteristics of monsoon troughs in the western North Pacific,we established an intensity index and a location index to describe the activity of the monsoon troughs in three different regions and their impacts on tropical cyclones generated therein（MTTCs）.The behavior of the monsoon troughs was analyzed.The following conclusions are obtained：（1）The established monsoon trough intensity index has a positive correlation to the location index,indicating that stronger monsoon trough intensity corresponds to more northward location.（2）Monsoon trough intensity exhibits significant interannual variation,with obvious periods of 4–5 years prior to 1994 and 2–3 years afterwards.（3）The affecting factors on monsoon trough intensity are different with areas.The preceding SST anomaly results in anomalous atmospheric circulation, leading to the anomaly of monsoon trough intensity in different areas.（4）The frequency of cyclogenesis and location anomalies of the MTTC are closely related to the intensity and location of the monsoon trough. Most of the anomalously less MTTC years coincide with the years with a weak general monsoon trough and weak regional monsoon troughs.The anomalously more MTTC years are associated with both a strong general monsoon trough and a weak general monsoon trough combined with a strong one over the South China Sea,though with a larger probability for the latter.（5）The interseasonal variation of the intensity of monsoon troughs provides favorable conditions for TC generation and development.The monsoon trough is in the active periods of both quasi-biweekly 10 to 20 day and 30 to 60 day oscillations,which is favorable for MTTC occurrence.