六盘山春季雾微物理特征分析  

Observation and Analysis of Spring Fog Process in Liupan Mountain

作　　者：余杰 舒志亮 林彤 杨玲[1,2] 郭在华[1,2] YU Jie;SHU Zhiliang;LIN Tong;YANG Ling;GUO Zaihua(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China;Key Laboratory of Atmospheric Sounding,China Meteorological Administration,Chengdu 610072,China;Ningxia Meteorological Disaster Prevention Technology Center,Yinchuan 750002,China;Key Laboratory of Meteorological Disaster Monitoring,Warning and Risk Management in Arid Regions,China Meteorological Administration,Yinchuan 750002,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225 [2]中国气象局大气探测重点开放实验室,四川成都610072 [3]宁夏气象灾害防御技术中心,宁夏银川750002 [4]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002

出　　处：《成都信息工程大学学报》2023年第5期595-601,共7页Journal of Chengdu University of Information Technology

基　　金：宁夏自然科学基金资助项目(2023AAC03802)。

摘　　要：为探究六盘山春季雾的主要类型,形成原因以及微物理结构特征,利用2021年3-5月的12次雾滴谱资料、自动气象观测站资料和ERA5再分析资料,结合相关性分析和线性回归的方法,分析六盘山春季雾期间的天气背景、雾类型以及微物理结构特征,并与其他地区雾针对微物理特征进行对比。研究结果表明:六盘山春季雾主要是由暖湿气流影响导致的辐射-平流混合雾,12次个例雾的粒子浓度平均值为264 N·cm^(-3),最小值为108 N·cm^(-3),平均直径为8μm,液态水含量平均为0.059 g·cm^(-3)。从4月18日的个例中发现,雾滴谱呈Deirmendjian分布,雾滴集中在约6μm的小滴段。与其他山区相比,六盘山雾滴平均粒子数浓度偏低,与南岭山地相近,其平均粒子直径与庐山、衡山接近;六盘山雾平均液态含水量相较于其他山区整体偏低。不同地理条件下,发现沿海地区海雾的粒子数浓度较山地雾微物理参数整体偏低。To explore the main types,causes and microphysical structure characteristics of spring fog in Liupan Mountain,this paper analyzes the weather background,fog types and microphysical structure characteristics of spring fog in Liupan Mountain by using fog drop spectrum data,automatic meteorological observation station data and ERA5 reanalysis data of 12 fog cases from March to May 2021,combined with the methods of correlation analysis and linear regression,and compared with the microphysical characteristics of fog in other regions.The results show that the spring fog in Liupan Mountain is mainly the radiation advection mixed fog caused by the influence of warm moisture flow.The average particle concentration of 12 fog cases is264 N·cm^(-3),the minimum is 108 N·cm^(-3),and the average diameter is 8μm.The average liquid water content is 0.059 g·cm^(-3).From the case on April 18,it is found that the droplet spectrum is Deirmendjian distribution,and the drop size of dropletis concentrated in about 6μm.Compared with other mountains,the average particle number concentration of fog droplets in Liupan Mountain is lower,similar to that in Nanling Mountain,and the average particle diameter is similar to that in Lushan Mountain and Hengshan Mountain;the average liquid water content of fog in Liupan Mountain is lower than that in other mountain areas.Under different geographical conditions,it is found that the microphysical parameters of sea fog in coastal areas are lower than those of mountain fog.

关 键 词：雾滴谱 六盘山 春季雾 微物理特征 

分 类 号：P426.4[天文地球—大气科学及气象学]