【摘要】 利用常规观测资料、NCEP1°×1°逐6h再分析资料、地面自动站雨量资料,对1209号台风"苏拉"倒槽造成鄂西北特大暴雨天气过程进行诊断分析,结果表明:本次强降水天气过程是在"苏拉"台风倒槽、东南风和东风超低空急流、华北冷锋共同作用下产生的;台风倒槽建立了来自海上的水汽通道,为特大暴雨区提供了源源不断的水汽,降水强度则与水汽通量散度密切对应。更多还原

【Abstract】 Using conventional observation data,NCEP1 ° × 1°6h reanalysis data,diagnostic analysis on heavy torrential rain in the Northwest of Hubei which is caused by 1209 typhoon Saola inverted trough. The results show that: the process of strong precipitation weather effects on the typhoon Saola inverted trough,Southeast and East jet,the cold front from the North.Typhoon trough establishes a water vapor channel from the sea,which provides continuous vapor to the heavy rainfall area,and the rainfall intensity corresponds closely with the moisture flux divergence.更多还原