2023年3月贵阳机场一次辐射雾天气过程分析

Analysis of a Radiation Fog Weather Process at Guiyang Airport in March 2023

本文利用常规气象资料、自动观测资料等对贵阳龙洞堡机场一次辐射雾天气过程进行诊断分析。结果表明:此次天气过程为一次典型的辐射雾天气过程,其环流形势属于高压型,这样的大气环流形势为辐射雾的形成提供了良好的条件;适宜的风速有利于产生适度的垂直混合作用,而适度的垂直混合作用有利于辐射雾的生成;辐射冷却使近地面水汽达到饱和,同时逆温层的存在使低层水汽不易扩散,有利于辐射雾的形成与维持;日出后随着太阳短波辐射增强,近地面空气温度上升,逆温层逐渐被破坏,近地面水汽含量减少,辐射雾也逐渐消散。

In this paper, conventional meteorological data and automatic observation data are used to di-agnose and analyze the weather process of primary radiation fog at Longdongbao Airport in Guiyang. The results show that this weather process is a typical radiation fog weather process, and its circulation situation belongs to the high-pressure type, which provides good conditions for the formation of radiation fog. The appropriate wind speed is conducive to the generation of moderate vertical mixing, and the moderate vertical mixing is conducive to the generation of radiation fog. Radiative cooling saturates the water vapor near the surface, and the existence of the inversion layer makes it difficult for the water vapor in the lower layer to diffuse, which is conducive to the formation and maintenance of radiant fog. After sunrise, with the enhancement of solar shortwave radiation, the temperature of the air near the surface rises, the inversion layer is gradually destroyed, the water vapor content near the surface decreases, and the radiation fog gradually dissipates.