甘肃中部降水性层状云微物理结构特征个例分析  

Microphysical Structure of a Stratiform Cloud Precipitation Event in Central Gansu Province

作　　者：庞朝云[1] 黄山[1] 张丰伟[1] 

机构地区：[1]甘肃省人工影响天气办公室,兰州730020

出　　处：《气象科技》2016年第5期805-810,共6页Meteorological Science and Technology

基　　金：甘肃省气象局项目(2015-15)"甘肃地区层状云微物理特征研究";"甘肃省人影创新基金(2015-02)"共同资助

摘　　要：利用机载PMS粒子探测系统对2006年8月27日甘肃省中部一次降水性天气过程进行空中观测,对云中微物理特征进行了分析。研究发现云层中小粒子对含水量的贡献较大,云层主要以平均直径小于20μm的小云滴为主。在低层云滴浓度和含水量大于上层,而平均直径小于上层,符合"播撒-供给"降水机理,云上部主要增长方式有凝华增长、淞附增长,在云下部主要增长机制是碰并增长。The airborne PMS particle detection system is used to observe a rainfall process occurred in central Gansu Province on 27 August 2006,and the microphysical features of the precipitation clouds are analyzed.The results show that the clouds mainly consist of small cloud particles with the average diameter of less than 20μm,which have more contribution to cloud water content.It obeys the ＂sowsupply＂mechanism of precipitation,and cloud droplet concentration and water content at lower levels were relatively greater,but the average diameter was less than that at upper levels.There were three growth mechanisms of cloud droplets：deposition growth and riming growth at the top of the cloud,and mainly coagulation growth in the lower part of the cloud.

关 键 词：飞机增雨 微物理结构 粒子谱 

分 类 号：P458.121.1[天文地球—大气科学及气象学]