摘要
根据2005年3月21日在河南进行的层状云飞机播云试验的探测资料,对人工增雨催化前后层状云的宏微观物理量进行对比分析。结果表明,播云前在4200m高度平飞中观测到的小云粒子数浓度最大值为1.36×108个/m3,相应平均直径在5μm左右;小云粒子数浓度和云液态水含量在催化后均减小,播撒层下方变化较之播撒层变化更加显著;5000m高度小云粒子平均直径由催化前的17.32μm增加到催化后的18.07μm,平均直径明显增大,这些作业前后微观物理量的变化表明了人工催化层状云的物理响应。不同高度飞行具有相似的粒子谱分布。
Based on the PMS data of an aircraft cloud seeding in stratiform cloud in Henan Province on March 21, 2005, the differences of macro and microphysical character istics between seeded and unseeded clouds are analyzed. The results indicate tha t the maximum concentration of small cloud particles is 1.36×10^8m^-3 at the height of 4200m before seeding, and the corresponding mean diameter is abo ut 5μm. The concentration and liquid water content of small cloud particles de crease after seeding, and their change below the seeding layer is more obvious t han that at the seeding layer. The mean diameter of small cloud particles increases from 17.32μm to 18.07μm at 5000m height. The change of microphysical quantity after seeding is caused by cloud seeding. There are similar cloud particle spectra at different heights.
出处
《气象》
CSCD
北大核心
2009年第10期8-24,I0001,共18页
Meteorological Monthly
基金
国家科技支撑计划课题“混合云人工增雨技术研究”(批准号:2006BAC12B02)
科技部公益性行业(气象)科研专项项目“京津经济区及华北区域气溶胶对云的改变导致的降水变化及其在天气预报中的应用”(GYHY200706036)
关键词
层状云
微物理特征
催化作业
效果分析
stratiform cloud microphysical characteristics cloud seeding effective analysis
