双偏振多普勒天气雷达在零度层亮带探测中的应用研究  

The Research on Zero Layer Bright Band Detecting Using Dual Polarization Doppler Weather Radar

作　　者：王林[1] 焦中生[2] 孟鑫[2] 朱红赞[2,3] 

机构地区：[1]96151部队,安徽黄山245000 [2]解放军理工大学气象海洋学院,南京211101 [3]94915部队气象台,甘肃临洮730500

出　　处：《气象水文装备》2012年第6期8-10,13,共4页meteorological and hydrological equipments

摘　　要：利用双偏振多普勒天气雷达在层状云降水中的探测资料，分析了降水粒子在通过零度层时的双偏振参量的变化规律。结果表明，粒子在通过零度层时，反射率因子Z、差分反射率因子ZDR先增大后减小；相关系数ρHY（0）先减小后增大。由此证明，在通过零度层时，粒子由冰相融化成大雨滴，最后变为小雨滴，从双偏振多普勒雷达的测量参数角度解释了零度层亮带形成的原因。The variation of dual polarization parameters through the zero layer is analyzed using the data of dual polarization Doppler weather radar in the detection of stratiform precipitation. The results show that when the particles go through the zero layer, the refleetivity, the differential reflectivity first increases and then decreases; correlation coefficient first decreases and then increases, thus proving that the ice particles are melting into big raindrops, and finally into small ones, so the causes of the formation of zero layer bright band is interpreted from the dual polarization Doppler radar measurement parameters.

关 键 词：双偏振多普勒天气雷达 零度层亮带 水凝物相态 

分 类 号：P415.2[天文地球—大气科学及气象学]