摘要
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。
Seeding effect analysis software for convective cloud rainfall enhancement with radar products has been de- signed 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 enhance- ment 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 ope- ration stations that were proven to be effective in practice were selected through comprehensive analysis.
出处
《气候与环境研究》
CSCD
北大核心
2012年第6期871-883,共13页
Climatic and Environmental Research
基金
业务开发项目QJH2011-161
湖北省气象局科技发展基金2012Y03
关键词
对流云
人工增雨
效果分析
催化指标
Convective, Cloud precipitation enhancement, Effect analysis, Seeding index
