宁波机场一次春季大雾天气过程诊断分析  

Diagnostic Analysis of Spring Fog Weather at Ningbo Airport

作　　者：杨琦堡 吴福浪 曹文 陶俞锋 Yang Qibao;Wu Fulang;Cao Wen;Tao Yufeng(Air Traffic Control of Ningbo alfiliated to Civil Aviation Administration of China,Ningbo 315154 Zhejiang China)

机构地区：[1]中国民航宁波空中交通管理站,浙江宁波315154

出　　处：《中国民航飞行学院学报》2021年第2期47-51,共5页Journal of Civil Aviation Flight University of China

摘　　要：利用常规探测资料、NCEP/FNL再分析资料,对2016年4月13-14日宁波机场发生的一次大雾天气过程进行诊断分析。结果表明:此次大雾天气过程为平流辐射雾;偏东北气流、槽后西北气流、逆温层等都有利于大雾的形成;温度露点差(t-td)对大雾的形成和消散具有一定的指示意义;大雾形成前期中高层的冷平流造成近地层辐射降温,后期低层暖平流作用在宁波机场上空形成"干暖盖",有利于大雾的形成和维持;近地层弱的垂直上升运动和上层的下沉运动,有效阻止了近地层的水汽向上扩散,对大雾的形成具有积极的作用。This issue investigated and diagnostically analyzed a spring fog weather process at Ningbo airport from April 13-14,2016 through conventional meteorological observation and NCEP/FNL reanalysis data.The results show that:The process was an advection radiation fog weather process.The northeast airflow of lower layer,the northwest airflow behind the trough of upper layer,and the inversion layer were all conducive to the formation of heavy fog.The difference of temperature and dew temperature(t-td)is a good indication for the formation and dissipation of heavy fog.The cold advection of the middle and upper layers in the early stage of heavy fog caused near-surface radiation cooling.In the late stage of heavy fog,low-level warm advection formed a"dry and warm cover"over Ningbo Airport,which provided a favorable environment for the generation and development for heavy fog.Weak vertical upward movement of the near-surface layer and downward movement of the upper layer effectively prevented the water vapor of the near-surface layer from spreading upward,which have a positive effect on the formation of heavy fog.

关 键 词：平流辐射雾 温度露点差 温度平流 干暖盖 

分 类 号：P426.4[天文地球—大气科学及气象学]