济南机场初冬一次连续性大雾过程分析  

Analysis on a Heavy Fog in Jinan Airport in Early Winter

作　　者：任伟 Ren Wei(Meteorological Station of Shandong Air Traffic Control Bureau of Civil Aviation,Shandong Jinan 250107)

机构地区：[1]民航山东空管分局气象台,山东济南250107

出　　处：《内蒙古气象》2021年第1期13-17,共5页Meteorology Journal of Inner Mongolia

摘　　要：利用地面气象观测资料、NCEP再分析资料和GDAS资料,结合天气形势、物理量场,并利用轨迹分析方法,对2019年12月7—10日发生在济南机场的持续性大雾天气做了详细分析。结果表明:本次大雾是在稳定的大尺度天气背景下发生的;连续的逆温结构是持续性大雾形成的重要原因;地面辐射冷却和低层冷暖平流有利于大雾的形成和维持;低层弱上升运动配合中层的弱下沉运动有利于大雾的维持和发展;HYSPLIT模式后向轨迹追踪表明,近低层偏南气流的水汽输送是大雾的主要水汽来源,其对大雾的水汽贡献高达61%,西北气流输送的水汽相对较少,其主要表征短波槽后的冷平流及高压前部的弱冷空气,是一支干冷的辐散下沉气流。Using the station observation data,NCEP reanalysis data and GDAS data,combined with weather condition and physical quantity field,the synoptic analysis of a heavy fog process occurring in Jinan Airport was investigated.The results showed that this heavy fog occurred under the background of stable large-scale weather.The continuous temperature inversion structure was the important reason for the formation of the heavy fog.Radiation cooling process at ground layer and cold-warm advection in the lower layer were conducive to the formation and maintenance of the heavy fog.The weak ascending motion of the lower layer and the weak sinking motion of the middle layer played a important role in the long-time maintenance and development of the fog.The simulated results from HYSPLIT indicated that the water vapor come from near-surface southerly air flow was the main source of the heavy fog,and its contribution to the water vapor of the fog was up to 61%.The northwest airstream carried less water vapor.It mainly characterized the cold advection behind the short-wave trough and the weak cold air in the front of the high pressure,which was a dry and cold divergent sinking airflow.

关 键 词：持续大雾 逆温层 HYSPLIT模式 

分 类 号：V321.222[航空宇航科学与技术—人机与环境工程]