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利用常规地面探测资料、探空资料、水汽条件等再分析资料,对2016年11月27日贵阳市一次辐射大雾过程的环流背景、天气要素、物理量等进行分析,揭示了辐射大雾从形成到消散的全部过程。结果表明:在水汽条件充足的条件下,中高层暖性高压脊、地面弱气压场及稳定层结结构可以为辐射雾提供良好的环流背景;地面辐射冷却效应对辐射雾有重要触发作用,辐射雾的形成具有明显的气温日较差,形成至消散阶段因水汽释放潜热具有冷却作用,温度较低极易出现霜。
Based on the reanalysis data of conventional ground exploration data, sounding data and water vapor conditions, the circulation background, weather elements and physical quantities of a heavy fog during Guiyang on November 27, 2016 are analyzed. To dissipate the whole process. The results show that under the conditions of adequate water vapor, the warm ridge, the weak earth pressure field and the stable structure of the middle and high levels of warm ridge can provide good circulation background for the radiation fog. The radiation cooling effect of the ground has an important triggering effect on the radiation fog. The radiation fog Of the formation of a clear temperature day worse, the formation of the dissipation phase due to the release of latent heat of water vapor has a cooling effect, the temperature is low prone to frost.