沪宁高速公路大雾及气象要素特征分析  

STATISTIC ANALYSIS AND CLASSIFICATION OF FOGS AT SHANGHAI-NANJING FREEWAY

作　　者：吴和红[1] 严明良[2] 缪启龙[1] 段春锋[1] 

机构地区：[1]南京信息工程大学江苏省气象灾害重点实验室,江苏南京210044 [2]江苏省气象局交通气象研究所,江苏南京210009

出　　处：《气象与减灾研究》2010年第4期31-37,共7页Meteorology and Disaster Reduction Research

基　　金：公益性行业(气象)科研专项资助项目(编号:GYHY200906027)

摘　　要：利用2006年6月-2009年5月沪宁高速公路AWM自动气象站资料,研究了不同类型大雾持续时间、能见度变化及其出现过程中风、湿度变化特征。结果表明,有超过50%的大雾会发展成浓雾;大雾持续时间以平流雾最长,辐射雾最短;67.6%的大雾在长时间低能见度之前会出现类似"象鼻"形的突变前兆,这可能与地理环境有关;大雾过程中风向以东风和西风为主,锋面雾有部分为偏南风;平流雾发生时风速较辐射雾和锋面雾大,锋面雾发生时风速较多为静风,结束时风速快速增大;平流雾发生时相对湿度多有突变,而辐射雾、锋面雾的相对湿度以渐变为主。Using the data of AWM automatic meteorological stations located in Shanghai-Nanjing freeway,the duration,visibility variation,different types of fogs;the variation of wind and humidity are analyzed.Results show that more than half of the fogs develop into thick fogs.Advection fogs last the longest time,while radiation fogs last shortest.The 67.6% heavy fogs have sudden variation feature in visibility like as trunk before long-time low visibility.Easterly and westerly are mainly streams during a fog process.When advection fog occurs,the wind speed is greater than radiation fog＇s and frontal fog＇s.Frontal fog is related to the static wind when it occurs and has a rapidly increase of wind speed when it ends.Advection fog form generally with the rapid increase of relative humidity,while radiation fogs and front fogs increase depending on the gradual change of relative humidity.

关 键 词：沪宁高速 辐射雾 相对湿度 风速 

分 类 号：P426.4[天文地球—大气科学及气象学]