基于天气雷达的人工消雨催化剂量估算技术

摘要

准确获取人工消雨所需催化剂量极其困难,本文试着从另一种角度估算人工消雨催化剂量,即利用天气雷达探测的低于-5℃以下的回波,将其等价为等量的液态水,并将液态水分解为若干个小直径雨滴(如直径为100μm雨滴)视为起到消雨作用,进而计算出消雨所需AgI催化剂量最大和最小值.利用该方法,将北京南郊CINRAD/SA多普勒天气雷达以半径230 km探测范围内划分为不同网格大小的若干个网格,并给出每个网格消雨所需催化剂量的最大和最小值,供消雨作业指挥参考.%It is extremely difficult to obtain the amount of catalyst in artificial rain dispersal.This paper is trying to estimate the amount of catalyst in artificial rain dispersal from another method,that is,by calculating the liquid water from echoes below-5 ℃ detected by weather radar,and dividing the liquid water into a number of small diameter raindrops (such as raindrops with a diameter of 100 μm),then the maximum and minimum doses of AgI needed in artificial rain dispersal can be gained.Based on the algorithm above,the rain dispersal operation command system of the CINRAD/SA Doppler Weather Radar in the south suburbs of Beijing is developed,which can give the maximum and minimum AgI doses in each grid of the radar detection area with a radius of 230 km,and providing the reference amount of catalyst when carrying out rain suppression.