银川河东国际机场两次持续性大雾过程的特征及维持机制  

On Characteristics and Maintenance Mechanism of Two Persistent Heavy Fog Process in Yinchuan Hedong International Airport

作　　者：梁希豪 曾祥耀 赵晔晖 杜星 潘佳 LIANG Xi-hao;ZENG Xiang-yao;ZHAO Ye-hui;DU Xing;PAN Jia(Ningxia Air Traffic Management Sub-bureau of CAAC,Yinchuan 750009,China;Gansu Air Traffic Management Sub-bureau of CAAC,Lanzhou 730000,China)

机构地区：[1]民航宁夏空管分局,银川750009 [2]民航甘肃空管分局,兰州730000

出　　处：《西南师范大学学报（自然科学版）》2020年第12期85-92,共8页Journal of Southwest China Normal University(Natural Science Edition)

摘　　要：利用NECP/NCAR再分析资料、民航气象观测资料和常规高空地面观测资料,对银川河东国际机场2009年连续4 d和2015年连续4 d的2次持续性大雾天气过程从环流特征、动力特征、形成原因和维持机制等方面进行诊断分析.结果表明:2009年的持续性大雾先是降雪雾后是辐射雾,2015年的持续性大雾是一次典型的辐射雾过程.纬向环流是持续性大雾维持的高空环流背景,低压或均压场是大雾发生和维持的地面环流形势.降雪雾期间从地面至高空均是高湿区,辐射雾的配置以低层潮湿中高层干燥为主.强烈上升运动以及低层辐合高层辐散的高低空配置为降雪雾过程提供了较好的动力条件,中高层大尺度的下沉运动是辐射雾出现和维持的重要因素.低层的暖湿水汽通道的建立以及水汽辐合区的出现,为大雾提供了充沛的水汽条件.Based on the NECP/NCAR reanalysis data,civil aviation meteorological observation data and conventional high altitude ground observation data,Diagnostic analysis of the two persistent heavy fog weather processes at Yinchuan Hedong International Airport for 4 consecutive days in 2009 and 2015 has been made in terms of circulation characteristics,dynamic characteristics,causes of formation and maintenance mechanism.The results show that the persistent heavy fog in 2009 is the snow fog and radiation fog,and the persistent heavy fog in 2015 is a typical radiation fog process.The zonal circulation is the background of high altitude circulation in the persistent fog process,the low pressure or uniform pressure field is the surface circulation situation of fog,which can make fog happen and maintain.During the snow fog period,the high humidity area from the ground to the high.The radiation fog is low level wetting,middle and upper level drying.Strong ascending motion and low-level convergence and high-level divergence at low-high altitudes provide better dynamic conditions for snow fog process,large scale subsidence in middle and high level is an important factor for the emergence and maintenance of radiation fog.The establishment of warm and humid vapor channels and the emergence of water vapor convergence zones in low level,which is providing abundant water vapor conditions for the fog process.

关 键 词：持续性大雾 环流特征 动力特征 

分 类 号：P49[天文地球—大气科学及气象学]