摘要
利用WRF数值模式对2006年7月14—15日由0604号登陆台风碧利斯(Bilis)引发的特大暴雨过程进行了数值模拟,分析了这次暴雨产生的原因。结果表明:台风自身的非对称结构是暴雨维持的机制;位涡倾斜下传致使深对流出现;低层暖湿空气沿湿等熵面的爬升与下沉冷空气交汇,对流强烈发展,产生暴雨。
By using the numerical model WRF, the progress of rainstorm resulted from landfall tropical cyclone Bilis（0604） was numerical simulated, which took place in July 14-15,2006. The reason of this rainstorm was analysed by using the data output of the model. The results show that the dissymmetry structure of Typhoon Bilis is the mechanism of rainstorm maintaining. Deep convection was induced by PV going down tipsily. In the low level, the warm and wet air climbed along the isentropic surface and met with the subsided cold air, resuliting in the intense development of the convection and the occurring of the rainstorm.
出处
《山东气象》
2007年第4期1-5,9,共6页
Journal of Shandong Meteorology
基金
国家自然科学基金项目(40405009)
江苏省科技厅社会发展项目(BS2005055)
国家自然科学基金项目(40505011)
关键词
台风
位涡
湿位涡
数值模拟
typhoon
potential vorticity
moisture potential vorticity
numerical simulation
