Spatiotemporal distributive characteristics of tropical cyclone activities over the Northwest Pacific in 1979-2006.

In this paper,climatology and interannual variation in the intensity,track and landfalling location of tropical cyclones(TCs) landfalling in China over the Northwest Pacific(NWP) are systematically examined,using the about 30 years(1979—2006) TC dataset from the Joint Typhoon Warming Center.The results indicate that a large proportion of landfalling TCs originates in the western part of the NWP and the mid-north part of the South China Sea.The landfalling TCs forming in the southwest part of the NWP are characterized by northwestward tracks,while those forming in the northwest of the NWP and the South China Sea mainly have meandering and recurving tracks.The intensity of landfalling TCs has a tendency to increase.The landfalling locations of TCs display a trend of northeastward shift,which leads to the increase in landfalling TCs north of Xiamen and the decrease south of Xiamen,thus showing the interdecadal variation in TC tracks over the NWP.