中文摘要：

利用日本的JRA-25（Japanese 25-year Reanalysis）逐日再分析风场资料以及美国联合台风预报中心的热带气旋（TC）数据,以厦门为分界点,分别对影响登陆我国厦门以北和厦门以南TC的西北太平洋副热带高压和季风槽作了相关的环流分析。通过定义副热带高压的西伸脊点和南北脊线指数,以及季风槽的倾斜和强度指数,定量研究它们与登陆我国不同区域TC的关系。研究结果表明,所定义的指数对西北太平洋地区TC的生成位置、能量及登陆我国的路径有很好的指示作用。西北太平洋副高位置东西以及南北位置的偏移对登陆我国厦门以北TC的路径有很大影响;西北太平洋季风槽线斜率对登陆我国厦门以南TC的路径有一定影响,且倾斜程度与西北太平洋地区TC平均生成地的南北向偏移有密切的关系,并且,西北太平洋季风槽线的平均涡度对于西北太平洋地区TC生成时的能量也有很大影响。

英文摘要：

The circulation patterns associated with the subtropical high and the monsoon trough over the western North Pacific, which respectively modulate landfalling tropical cyclones （TCs） to the north and south of Xiamen, are systematically explored using the Japanese 25-year Reanalysis （JRA-25） daily wind field and tropical cyclone （TC） dataset derived from the Joint Typhoon Warning Center, USA. Furthermore, the relationships between landfalling TCs and large scale circulations is examined quantitatively by defining the indices of westward-extension andsouth-northward shift of the subtropical high ridges, as well as those of the monsoon trough slope and intensity. The results reveal that these indices act as key indicators of TC genesis locations, intensity and tracks. The location of subtropical high is responsible for tracks of landfalling TCs to the north of Xiamen. The slope of monsoon trough line impacts the tracks of landfalling TCs to the south of Xiamen, and modulates north-southward shift of TC genesis locations over the western North Pacific. Moreover, the average vorticity of monsoon trough line influences theenergy of TC genesis.