气象学报Issue(4)：782-793,12.DOI:10.11676/qxxb2014.044
减弱对流云降水的 AgI 催化原理的数值模拟研究
Numerical study of the AgI seeding principle for decreasing the convective cloud rainfall
摘要
Abstract
After two prognostic variables are added,an AgI seeding scheme is coupled with the three-dimensional cloud model, considering four nucleation modes.A case of convective cloud rainfall is simulated using this model.Numerical seeding experi-ments of releasing AgI in cloud are simulated to study the possibility to decrease the convective rainfall intensity.Several tests in the different locations and different concentrations of seeding particles are designed.The results show that overseeding in up-draft area with supercooled water can not only reduce the amount of rainfall,but also reduce the maximum rainfall strength. With 2×108 kg-1 seeding concentration,rainfall amount can be decreased up to 32%,which greatly lowers the possibility of causing flood.After seeding with large amounts of AgI,numerous AgI particles are nucleated,and these ice particles consume most supercooled water.The falling speeds of graupel and raindrops become weaker after seeding.The decrease of melting a-mount of graupel to rain in seeding cloud causes the decrease of rain amount,but later the much more evaporation of rain causes less rainfall amount.The results show that the condensation freezing and immersion freezing are the dominant nucleation modes in this convective cloud.The over-seeding methods in this research are able to be used in field operation.关键词
对流云降水/AgI 催化/人工减雨/数值模拟Key words
Convective cloud rainfall/AgI scheme/Seeding to decrease rainfall/Numerical simulation分类
天文与地球科学引用本文复制引用
楼小凤,孙晶,史月琴,张邢..减弱对流云降水的 AgI 催化原理的数值模拟研究[J].气象学报,2014,(4):782-793,12.基金项目
资助课题中国气象科学研究院基本科研业务研究专项（2011Z005、2013Z009）、国家重点基础研究发展计划项目（2011CB403404）、国家自然科学基金项目（41075100、41275148）。 （）
