抚顺市“8·16”特大暴雨水汽图及红外云图特征分析

Feature Analysis of ‘8·16’ Torremtial Rain in Fushun City with Water Vapor Image and Infrared Image

利用气象常规资料、气象卫星资料对2013年8月16日抚顺地区特大暴雨过程进行了水汽图和红外云图特征分析,结果表明:1此次暴雨为弱冷空气与强盛的偏南暖湿气流交绥形成的副高后部暴雨,稳定性降水与对流性降水相互叠加,雨量大、降水时段集中、持续时间长是此次降水的显著特点。2地面辐合线的方向与对流云团的发展方向有较好的对应关系,暴雨落区与对流云团位置基本一致。3对流云团具有明显的长轴,呈椭圆型,水汽带出现于对流云团的后方,在对流云团的后方有新的对流单体形成并发展成云团,形成云团的后向传播,在抚顺地区形成列车效应。4高空较为平直的纬向环流有利于冷空气自西向东推进,形成波动,促进副高边缘对流云团的发展。

In this paper,by using the conventional meteorological data and the meteorological satellite data to analyze the feature of torrential rain process in Fushun area on August 16 ,2013 with the water vapor image and infrared image.The results were as follows：①the heavy rain for the subtropical high rear rain weak cold air and strong warm and wet flow formed by the interaction of stability ,precipitation and convective precipitation were superimposed on each other.Rainfall,precipitation,precipitation time concentration during long duration was a notable feature of the precipitation.②The direction of the surface convergence line had agood corresponding relationship with the development of convective clouds.Heavy rain area and convective cloud position were consistent.③The convective cloud cluster was elliptic ,had obvious long axis ,forming clouds backward propagation , formed train effect in Fushun area.④the high altitude was more straight zonal circulation ,which was conducive to the cold air from west to east promote,formed fluctuation,promoted the development of convective clouds at the edge of subtropical high.