人工增雨催化区跟踪方法与效果评估指标研究

Algorithm and Assessment of Tracking Seeding Coverage in Artificial Precipitation Enhancement

如何利用新一代天气雷达作业前后回波的变化分析人工增雨效果,对提高人工影响天气的科学性有非常重要的意义。文章基于新一代天气雷达三维拼图和最大相关系数的雷达回波跟踪方法(TREC),在考虑多个作业影响时间和催化剂扩散背景下,实现对高炮和飞机播云作业中催化区的连续跟踪,并计算区域内的最大反射率、垂直积分液态含水量等回波参数。利用2个降水过程,选择多个跟踪区域进行连续跟踪,详细分析了回波跟踪的合理性。选择北京的一次高炮增雨作业与一次模拟飞机作业,对其催化区进行跟踪。结果表明:利用TREC算法,能够合理跟踪回波在空间的垂直位置与水平位置,较好地跟踪单点、多点作业时催化区域移动,实时跟踪飞机播云催化区的回波变化,从而为人工增雨的效果评估提供了一个有意义的参考。

How to use the echo changes of new generation of weather radar before and after the operation in assess ment the result of artificial precipitation enhancement is very important for improving the scientificity of weather modification.In this paper,the method of tracking the seeding coverage based on both maximum correlation coefficients(TREC) and a new generation of weather radar three-dimensional CAPPI grid data is realized by considering multiple effective duration and the seeding coverage in artificial precipitation enhancement by antiaircraft guns and aircraft.Meanwhile,the echo parameters such as maximum reflectivity,VIL,etc.,are calculated.Besides,the paper also analyzes the rationality of echo tracking method by using two precipitation processes and continuously tracking the related areas.One artificial precipitation enhancement operation by antiaircraft guns in Beijing and one artificial precipitation enhancement simulated by aircraft are chosen to track the seeding coverage.The result indicates that using the algorithm TREC,we can track the echoes reasonablely in both vertical and horizontal positions in space,and also can track well the echo change in seeding coverage during artificial precipitation enhancement operations by single or several antiaircraft guns and aircraft.So,the work provides a meaningful scientific reference for the assessment of artificial precipitation enhancement.