大气科学进展（英文版）
大氣科學進展（英文版）
대기과학진전（영문판）
ADVANCES IN ATMOSPHERIC SCIENCES
2010年
5期
1014-1024
,共11页
数值模拟%台风%赤道%气候%对流不稳定%年代际变化%敏感性实验%北太平洋
數值模擬%檯風%赤道%氣候%對流不穩定%年代際變化%敏感性實驗%北太平洋
수치모의%태풍%적도%기후%대류불은정%년대제변화%민감성실험%북태평양
near-equatorial typhoon%wind surge%Coriolis parameter
The climatology of near-equatorial typhoons over the western-north Pacific are fully investigated using the JTWC （Joint Typhoon Warning Center） typhoon record from 1951 to 2006. The result shows that there are seasonal and decadal variations, as well as a distinctive spatial distribution, of such events. Among them, Typhoon Vamei is an example of a near-equatorial typhoon that occurred near Singapore in December of 2001. Using the WRF （Weather and Research Forecast） model, we attempt to find out how the well known ＂wind surge＂ of this event contributes to the development of Typhoon Vamei. It is found that the strong wind surge not only helps to provide advection of positive vorticity to Vamei between 800 and 500 hPa, but also increases the convective instability of the lower troposphere, and thus helps to induce convective outbreaks and rapid intensification. Furthermore, sensitivity experiments show that terrain and the land-sea distribution have very limited effects on the formation of Typhoon Vamei in the simulation, but an adequate Coriolis parameter （f） is still needed for the development of Vamei.
