一次基于飞机观测的河北中南部降雪云系微物理结构的对比分析  

Comparative Analysis of Microphysical Structure of Snowfall Cloud System in Central and Southern Hebei Based on Aircraft Observation

作　　者：付娇 张丹 董晓波 张健南 王姝怡 侯劭禹 薛学武 李政昊 FU Jiao;ZHANG Dan;DONG Xiaobo;ZHANG Jiannan;WANG Shuyi;HOU Shaoyu;XUE Xuewu;LI Zhenghao(Hebei Provincal Weather Modification Center,Shijiazhuang 050021,China)

机构地区：[1]河北省人工影响天气中心,河北石家庄050021

出　　处：《沙漠与绿洲气象》2023年第5期64-70,共7页Desert and Oasis Meteorology

基　　金：河北省省级科技计划资助(20375402D)。

摘　　要：2017年2月21日河北省出现一次低槽降雪天气系统,河北省人工影响天气办公室在系统槽前部位层状云系中开展飞机云微物理探测作业,通过对邢台、赵县两地云微物理垂直结构的精细化探测分析,发现本次过程云系为层状冷云。邢台、赵县两地云系均存在明显的逆温层,在逆温层及其下方出现过冷水,邢台过冷水较为丰富,含量达0.19 g/m^(3),在过冷水丰富层(高度为4561~5059 m,温度为-11~-8℃)下方可见结凇冰晶,直径有所增大,浓度没有出现明显增加;赵县云系过冷水含量达0.074 g/m^(3),与邢台相比偏低,冰晶在过冷水层(高度3308~3949 m,温度-10.3~-8.7℃)以凇附、粘连增长为主,与邢台相比冰晶聚合体偏多,粒子直径和浓度均偏大。本次探测过程,邢台云内过冷水含量丰富,具有人工增雪作业的条件;赵县云内过冷水含量偏低,人工增雪条件差。A low trough snowfall weather system appeared in Hebei province On February 21st,2017.The Hebei Provincal Weather Modification Office carried out aircraft cloud microphysical detection in the stratiform cloud system in front of the system trough.Through the fine detection and analysis of the cloud microphysical vertical structure in Xingtai and Zhaoxian,it was found that the cloud system in this process was stratiform cold cloud.There were obvious inversion layers in the cloud systems of Xingtai and Zhaoxian.The supercooled water appeared in and below the inversion layer.The supercooled water was relatively abundant in Xingtai amounting to 0.19 g/m3.Ice rime crystals could be seen below the abundant layer of the supercooled water(height ranged from 4561 to 5059 m,temperature ranged from-11 to-8℃).The diameter increased,but the concentration did not increase significantly.The content of supercooled water in Zhaoxian was 0.074 g/m3,which was lower than that in Xingtai.In the super cooled water region(height ranged from 3308 to 3949 m,temperature ranged from-10.3 to-8.7℃),the ice crystals grew mainly by riming and adhesion.The ice crystal aggregates were more than that in Xingtai,and the particle diameter and concentration were larger than that in Xingtai.During this detection process,the supercooled water in Xingtai cloud was abundant and had the conditions for artificial snow enhancement.The content of supercooled water in Zhaoxian was low,and the conditions of artificial snow enhancement was poor.

关 键 词：层状云 垂直探测 云微物理结构 过冷水 

分 类 号：P426.51[天文地球—大气科学及气象学]