2014年7月4日降水的双偏振雷达多参量回波分析

Multi-parameter Echo Analysis of Precipitation of Dual Polarization Radar on July 4,2014

为了研究飑线的降水结构和云物理特征,利用南京信息工程大学的C波段双偏振雷达资料,分析了2014年7月4日飑线的双偏振雷达多参量回波。研究发现,雷达回波图中降水回波结构较紧密,降水范围较大,但降水强度并不是很高;相关系数回波图中存在亮度层亮带,相关系数与差分反射率因子成负相关。这项研究有助于增进对飑线天气的云物理结构和回波演变机理的认识。

In order to study the precipitation structure and cloud physical characteristics of squall line ,using the C-band dual-polarization radar data of NUIST,the multi-parameter echo analysis of squall line of dual polarization radar on July 4,2014 was conducted.It was found that the structure of precipitation echo was relatively close in radar echo images,precipitation range was relatively large,but the precipitation intensity was not high.In echo image of correlation coefficient, there had a luminance layer bright band, and the correlation coefficient of the differential reflectivity factor was negatively correlated.This study will contribute to increase knowledge on cloud physical structure and echo evolution mechanism of squall line weather.