风廓线雷达在辐射雾过程中的应用  

Application of Wind Profiler Radar in Radiation Fog Process

作　　者：余佳 YU Jia(Meteorological Office of Hunan ATM Sub-bureau,Changsha Hunan 410000)

机构地区：[1]中国民用航空中南地区空中交通管理局湖南分局,湖南长沙410000

出　　处：《河南科技》2021年第24期19-22,共4页Henan Science and Technology

摘　　要：本文选取了长沙黄花机场一次辐射雾天气过程,采用边界层风廓线雷达风场数据,跑道RVR、MOR值,温度、露点等实时数据,分析了底层风场与能见度下降的相关性。分析后发现:稳定较小的风速(4 m/s以下)以及稳定少变的风向有利于辐射雾的形成,同时500 m高度有弱的风向切变比500 m以下一致风向更有利于大雾发展。500~600 m高度以下风场结构对于辐射雾的形成有着较大影响。当中空(1~2 km)风廓线上显示有反气旋高压环流时,往往反映着逆温层的存在,而高压环流底部位置与逆温层的底部有着相关性。In this paper,a process of the radiation fog weather was selected at Changsha Huanghua Airport,and the boundary layer wind profile radar wind field data,runway RVR,MOR value,temperature,dew point and oth⁃er real-time data were used to analysis the correlation between the wind field on the bottom of stratosphere and visibility decrease.It found that the stable and small wind speed(below 4m/s)and the stable with less variable wind direction are conducive to the formation of radiation fog,the weak wind shear at 500 m height is more con⁃ducive to the development of fog than the uniform wind direction below 500 m.The wind field structure below the height of 500-600 m has a great influence on the formation of radiation fog.When the wind profile in the mid-air(1-2 km)shows an anticyclonic high pressure circulation,it usually reflects the existence of an inversion layer,and the bottom position of the high pressure circulation is correlated with the bottom of the inversion layer.

关 键 词：风廓线雷达 辐射雾 低层风场 逆温层 弱风切变 

分 类 号：P412.25[天文地球—大气科学及气象学]