吉林省一次飞机增雨过程方案设计及效果分析
A Case Study of Design and Effectiveness Analysis of the Rainfall Enhancement by Aircraft in Jilin Province
中文摘要：
利用多普勒雷达、地面降水、飞机等观测资料，对2016年4月12日东移北抬影响吉林省的河套低压系统进行人工增雨方案设计和效果分析，根据作业需求设计了增雨作业实施方案，选取影响区和对比区，分析了作业前后雷达回波的变化、地面降水量变化。结果表明：此次河套低压北上天气系统，与高空槽配合，在吉林省境内水汽输送十分丰富，具有很好的作业条件。通过考虑多种影响因素，设计了飞行作业方案，实施作业；通过影响区和对比区雷达回波对比，作业后影响区回波具有明显强于对比区回波的特点，且增加了回波维持时间；降水量分析显示，影响区地面降水维持时间也较对比区维持时间增长。
中文关键词：
增雨，影响区，对比区
KeyWords：
rainfall enhancement, influence region, control region
Abstract：
Based on the observation data of Doppler radar, precipitation and aircraft, the design and effect analysis of rainfall enhancement in Meso Scale Vortex in Inner Mougolia Irrigation Area of Yellow River which moved towards Northeast and influenced Jilin Province on April 12, 2016 were carried out. According to the requirements, the implementation scheme of rainfall enhancement was designed. The influence region and the control region were selected. Changes of radar echo and precipitation in these regions before and after the operation were analyzed. Result shows that Meso Scale Vortex in Inner Mougolia Irrigation Area of Yellow River moved towards Northeast and was in cooperation with the upper trough. It brought plenty of vapor to Jilin Province and was with good seeding conditions. By considering many influencing factors, the flight operation scheme was designed and the operation was carried out. By comparing, the echo in the influence region is obviously stronger than that in the control region. Echo maintenance time is increased. The analysis shows that the maintenance time of precipitation in the influence region is also longer than that in the control region.