西北干旱地区一次降水性层状云的飞机观测分析  

Observation Study on PMS Data of Precipitation Stratiform Cloud in Northwest Arid Area

作　　者：庞朝云[1] 张丰伟[1] 张建辉[1] 

机构地区：[1]甘肃省人工影响天气办公室,甘肃兰州730020

出　　处：《干旱气象》2013年第2期272-277,共6页Journal of Arid Meteorology

摘　　要：利用机载PMS粒子探测系统对2007年8月30日甘肃省河西地区一次降水性天气过程进行空中观测,通过对云的微物理特征进行分析,对西北干旱地区夏季降水云的微物理结构有了一些认识。观测到此次云层中小云粒子平均浓度为4.62×106个/m3;计算含水量均值为0.0134 g/m3;粒子平均直径均值为15μm。发现云系上层云水含量、云粒子浓度都较下层大,水汽主要由较高层的系统输送。In order to improve the scientificalness and effect of the artificial rainfall, and select operation opportunity and operation sites more accurately, the aerial observation of a rainfall weather process occurred in the west region of Gansu Province on August 30, 2007 was carried out by using airborne PMS particle detection system. We had some understanding about the micro physical structure of sum- mer precipitation cloud in arid region of northwest China through analysis of the micro physical feature of the precipitation cloud. The observation showed that the average concentration of small particles in the cloud was 4.62×106 m -3, the average liquid water content （LWC） was 0. 0134 g/m3 , and the mean diameter of cloud droplet was 15μm. LWC and the concentration of cloud droplet in the up- uer Dart of the cloud were bigger than those of the lower oart. and the water vaoor was transoorted mainly by the higher weather system.

关 键 词：干旱地区 飞机增雨 微物理结构 粒子谱 

分 类 号：P426.51[天文地球—大气科学及气象学]