利用雷达回波参数分析雪的增长

Analysis of the Growth Process of Snow Particles According to the Pafameters of Radar Echoes

利用一次稳定性降水云系的７１３雷达观测资料，分析了云顶温度的分布情况，结果表明，该次过程有５７％－７０％的云系符合Ｇｒａｎｔ提出的“播云温度窗”指标。进而，根据值的变化，分析了云中雪粒子的增长情况。

The distribution of cloud top temperature is estimated base on the echoes at the top height of the Precipitating stratiform cloud system measured by the 713 type weather radar in Hebei province. The results show thai from 57 percent to 70 percent of cloud top temperature are seedable in the stratiform clouds according to proposed seedability index of cloud top temperature by Grant. In the sametime, based on different attenuated dB values of radan echoes , the growth case of snow particles with different temperature layers variation is analyzed.