沈阳桃仙机场一次持续性冻雾天气过程分析

Analysis of a Continuous Freezing Fog Weather Process at Shenyang Taoxian Airport

摘要: 本文利用桃仙机场天气图资料、自动观测系统(AWOS)数据、METAR报文和EC数值预报等资料，对2021年1月26日桃仙机场一次持续性冻雾天气过程进行了研究分析。本文着重分析了冻雾发生时的大气环流形式和地面气压场特征、近地层物理量特征和高空水汽条件。结果表明：本次持续性冻雾天气发生，主要是由于持续偏南风的暖湿气流输送叠加平流逆温造成，而数值预报在风向上的预测与实况风向的严重差别，是引起本次持续性冻雾天气前期没有预报准确的一个根本原因。

Abstract: Based on weather map data, AWOS data, METAR message and EC numerical forecast data of Taoxian Airport, a continuous freezing fog weather process on January 26, 2021, was studied and analyzed in this paper. The atmospheric circulation pattern, surface pressure field characteristics, physical quantity characteristics near the stratum and water vapor conditions in the upper air are analyzed emphatically. The results show that the continuous freezing fog weather is mainly caused by the continuous southerly warm and wet air transport and advection inversion, and the deviation of numerical forecast for the wind direction in Taoxian is an important reason for the failure of the forecast in the early stage of the continuous freezing fog weather.