【作者】 马新成； 金华； 毕凯； 董鹏捷； 黄梦宇； 张磊； 张蔷；

【Author】 Ma Xincheng Jin Hua Bi Kai Dong Pengjie Huang Mengyu Zhang Lei Zhang Qiang Beijing Weather Modification Office,100089

【机构】 北京市人工影响天气办公室；

【摘要】 利用2010年8月18日高后降水中山区层状云的飞机穿云观测资料,结合雷达、卫星云图及天气图等资料,详细分析了此次高后降水中山区层状云的宏观特征、微物理结构,并对降水形成机制进行初步探讨。结果表明:此个例由两层云构成,上层为冷云,下层云主要为暖云;冷层粒子图像显示主要以板状为主,平板柱状、柱状和霰粒为辅,冰粒子的聚合体在整个冷层都有出现;降水形成机制为播种-喂养机制,冷云中观测到丛集和淞附现象,其中淞附现象主要发生在冷云的中下部靠近融化层附近。更多还原

【Abstract】 A detailed analysis of macro/micro structure for stratiform cloud in a high-pressure system rear over mountain has been conducted on data including airborne DMT(Droplet Measurement Technologies),radar and weather chart etc.obtainer from field campaign on 18 August 2010 in Beijing,and the precipitation formation mechanism is preliminarily discussed.The results show that the stratiform clouds in case consist of two layers,with the top layer the cold clouds and the bottom one the warm clouds.The aggregates of ice particles are found to widely and randomly spread in the whole cold layer,where the ice particle shapes are mainly plate,supplemented by column and graupel.Furthermore,the precipitation results from the seeder-feeder mechanism in which low level supercooled clouds are seeded with ice crystals from above.In addition,both aggregation and riming(accretion of liquid water) growth of ice crystals are also observed in the cold clouds,and the riming mainly occurs close to melting layer in the lower-middle part of the cold layer.更多还原