中文摘要：

利用中尺度数值模式（WRF）,并同化了多普勒雷达反射率和径向速度资料以及非常规的观测资料,对近几年登陆于浙闽沿海的4例强台风进行了数值模拟。通过高时空分辨率的模拟结果对比分析表明：雷达资料的同化,对近海登陆台风路径和降水模拟以及中尺度降水特征都有进一步改进的效果;模拟较好的揭示了台风近中心螺旋云带中的强中尺度对流系统。通过模拟分析表明,在台风近中心的螺旋云带中,低层有一条强辐合线存在,它与实况多普勒雷达给出的低层平显（PPI）强度回波带有较好的对应关系,也与沿海地区中尺度暴雨系统紧密联系,并由此看到近海海域降水带和强对流区的存在。

英文摘要：

Doppler radar reflectivity,radial velocity and unconventional observation data are assimulated by mesoscale numerical model WRF to simulated four strong typhoons landing in Zhejiang and Fujian coast in recent years.The simulated result shows that assimilating radar data could further improve the simulation effect of typhoon track and precipitation distribution and clearly reveal the existence of the strong mesoscale convective system in the spiral cloud band near typhoon center.There is a strong convergence line occurring in the spiral cloud band near typhoon center,which corresponds very well to the observed Doppler CAPPI echo and related closely to the mesoscale heavy rainfall system in the coast area.