对流云人工增雨雷达效果分析软件的应用

根据雷达回波参量自动选取对比云并进行效果分析的方法,研制了对流云人工增雨雷达效果分析软件.在此基础上,对2008年湖北省12次对流云增雨试验进行了效果检验:发现其中10个个例催化效果良好,具体表现为增雨作业催化后,目标云的物理参数发生了比较明显的变化,回波强度、回波顶高、液态含水量、强回波面积等均增大,约半小时内达到峰值,而相应的对比云回波参量增长幅度比目标云小,或者没有继续发展,大部分对比云的生命史比目标云短.最后,通过综合分析,提出基层作业站点适宜开展人工增雨的催化指标,在实际应用中取得了良好的效果.

Application of Seeding Effect Analysis Software for Convective Cloud Rainfall Enhancement with Radar Products

Seeding effect analysis software for convective cloud rainfall enhancement with radar products has been designed and developed incorporating a method that selects the contrast cloud automatically and analyzes the seeding effect according to the radar echo parameters. Using this software, the effects of 12 pairs of convective precipitation enhancement operation experiments during 2008 in Hubei Province were evaluated. The results indicated that seeding had a good effect in ten cases. The relevant parameters of the seeded cloud changed obviously after the operation; the echo intensity, echo tops, vertically integrated liquid, and echo area increased, reaching a peak half an hour after operation. However, the contrast clouds increased less than the target cloud or stopped developing, and most of the contrast clouds had a shorter lifetime. Finally, the parameters of Doppler weather radar products applicable to precipitation enhancement for basic operation stations that were proven to be effective in practice were selected through comprehensive analysis.