Model analysis of radar echo split observed in an artificial cloud seeding experiment
Model analysis of radar echo split observed in an artificial cloud seeding experiment
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DOI：
10.1007/s13351-016-5053-y
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发表时间：
2016-03
影响因子：
3.2
通讯作者：
Shimada Masaki;Tomine Kikuro;Nishiyama Koji
中科院分区：
文献类型：
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作者：
Shimada Masaki;Tomine Kikuro;Nishiyama Koji
冬季在日本海上空进行了人工云催化试验，以显示大规模催化如何有效地减轻强降雪造成的损害。结果表明，播云后20 min，播云路径下方的雷达回波减弱，将雷达回波分为两部分。为了分析结果，使用天气研究和预报模式verion 3.5.1进行了数值模拟。在该模拟中，催化效应被表示为能够通过使云冰和雪堆积而形成霰粒子以及通过将云液态水改变为雪粒子来改变雨粒子的现象。雹粒子迅速下降，令雨量短暂增强，但雨量随后减少。因此，在野外实验中减弱的雷达回波被认为是由快速下降的霰粒子的增加造成的。
An artificial cloud seeding experiment was performed over the Japan Sea in winter to show how massive seeding could be effective to mitigate heavy snowfall damage. The results showed that 20 min after cloud seeding, a portion of the radar echo beneath the seeding track was weakened to divide the radar echo into two parts. In order to analyze the results, a numerical simulation was conducted by using the Weather Research and Forecasting model verion 3.5.1. In this simulation, the seeding effects were represented as phenomena capable of changing rain particles by accreting cloud ice and snow to form graupel particles and by changing cloud liquid water to snow particles. The graupel particles fell rapidly, thus temporarily intensifying the rainfall, which subsequently decreased. Therefore, the weakened radar echo in the field experiment is deemed to have been caused by the increase in rapidly falling graupel particles.