双线偏振雷达测雨效果的对比分析

本文根据1993、1994年15次层状云和12次对流云降雨过程的地面降雨资料和C波段双线偏振雷达资料，对双线偏振雷达和普通雷达测量不同强度降雨的效果进行了评估和比较。结果表明，从相对误差来看，双线偏振雷达使普通雷达的小雨高估、大雨低估的测量误差趋势减弱，它对小到中雨的测量结果优于普通雷达。双线偏振雷达大雨高估的现象可能与强对流性降雨中冰相粒子的存在有关。

Comparitive Study on Dual Linear Polarization Radar Measuring Rainfall Rate

The database is the C-band dual linear polarization radar data and ground raingage network data for 15 stratus and 12 convective rain processes during summers of 1993 and 1994. In this paper, we estimate systematically the measurement accuracy of rainfall rate by the dual linear polarization radar and conventional radar. The result indicates that the underestimation of the rainfall rate during heavy rain and the overestimation during light rain become small by ZDR method. ZDR method can improve the measurement of light and moderate rainfall rate. The overestimation of the rainfall rate during heavy rain by ZDR technique is possibly related with the existence of ice phase hydrometeors.