温州机场一次分段大雾过程分析  

Analysis of a Section Fog Process at Wenzhou Airport

作　　者：厉瑞孝 陈龚梅 LI Ruixiao;CHEN Gongmei(Wenzhou Air Traffic Management Station of Civil Aviation of China,Wenzhou 325024,Zhejiang,China)

机构地区：[1]中国民用航空温州空中交通管理站,浙江温州325024

出　　处：《民航学报》2021年第3期59-63,共5页Journal of Civil Aviation

摘　　要：5月8日傍晚至9日早晨温州机场发生一次平流雾和一次蒸发雾过程。本文对这两次大雾过程产生的环流形势、生消原因进行分析,着重分析了平流雾消散的原因。利用EC再分析资料对低层的层结稳定度、涡度和水汽通量散度的分析,发现此次平流雾是由1 000 hPa涡度由北往南扩展时发生发展,平流雾的消散是由小股弱冷空气在锋面过境前南下渗透后东移入海导致。弱冷空气入海以后,西南气流快速覆盖沿海地区是第二次蒸发雾发生的原因。近地面小系统的扰动对大雾的生消有重要影响,分析近地面小系统的发展变化,对大雾生消的精细化预报具有重要的意义。During the evening of May 8 to the morning of May 9, an advection fog and an evaporative fog occurred at Wenzhou Airport. In this paper, the circulation situation and causes of the two fog processes are analyzed, and the reasons for the dissipation of advection fog are analyzed as an emphasis. Based on the analysis of stratification stability, water vapor flux divergence and vorticity of the lower layer by EC reanalysis data, it is found that the advection fog occurred and developed when the vorticity expanded from north to south from 1 000 hPa, and the dissipation of the advection fog was caused by small weak cold air moving southward before the front passes through and then moving eastward into the sea. After the weak cold air entered the sea, that the southwest airflow quickly covered the coastal areas was the reason for the occurrence of the second evaporation fog. The disturbance of the near-surface small system has an important effect on the occurrence and disappearance of fog, and the analysis of the development and variation of the near-surface small system is of great significance to fine prediction of the occurrence and disappearance of fog.

关 键 词：平流雾 蒸发雾 层结稳定度 涡度 水汽通量散度 

分 类 号：P4[天文地球—大气科学及气象学]