摘要
文章利用威宁一次辐射雾天气过程中的固定式边界层风廓线雷达水平风场数据、地面气象观测气温、露点温度、10 min平均能见度及探空观测数据等,分析风场的时空分布与辐射雾生消的对应关系。结果表明:满足温度、湿度、天空状况等环境条件时,摩擦层以下的水平风场变化和辐射雾的生消存在良好的对应关系;边界层以上的风减弱至8~12 m·s^(-1)且一致性好,近地面层风向一致性转差且风速大小不变时,对应辐射雾发展;近地面风向再次转为一致时对应成熟阶段前期,摩擦层以下风速继续减弱至1~4 m·s^(-1),边界层到摩擦层存在风向转换,近地面层风向一致时,对应成熟阶段后期;边界层以下风向一致性差,静风维持时,对应辐射雾消散。
The article uses fixed boundary layer wind profile radar horizontal wind field data,ground meteorological observation temperature,dew point temperature,10 minute average visibility,and sounding observation data from a radiation fog weather process in Weining to analyze the correspondence between the spatiotemporal distribution of wind fields and the generation and dissipation of radiation fog.The results indicate that there is a good correlation between the horizontal wind field changes below the friction layer and the generation and dissipation of radiation fog when environmental conditions such as temperature,humidity,and sky conditions are met.When the wind above the boundary layer weakens to 8-12m·s^(-1) with good consistency,and the wind direction consistency in the near surface layer deteriorates while the wind speed remains unchanged,corresponding to the development of radiation fog.When the near surface wind direction becomes consistent again,it corresponds to the early stage of maturity.The wind speed below the friction layer continues to weaken to 1-4 m·s^(-1),and there is a wind direction transition from the boundary layer to the friction layer.When the near surface wind direction is consistent,it corresponds to the late stage of maturity.The consistency of wind direction below the boundary layer is poor,and when calm winds are maintained,the corresponding radiation fog dissipates.
作者
吕静
柯莉萍
袁海翔
蔡彤
余泽治
Lv Jing;Ke Liping;Yuan Haixiang;Cai Tong;Yu Zezhi(Weining Meteorological Bureau,Weining 553100;Xifeng Meteorological Bureau,Xifeng 551600)
出处
《气象水文海洋仪器》
2024年第6期106-110,共5页
Meteorological,Hydrological and Marine Instruments
关键词
辐射雾
固定式边界层风廓线雷达
风速分布
风向切变
radiation fog
fixed boundary layer wind profiler radar
wind speed distribution
wind shear
