南京北郊大气能见度影响因子研究  

The Influence Factors of Atmospheric Visibility in Nanjing's Northern Suburb

作　　者：于超 张蕾[1] YU Chao;ZHANG Lei(School of Atmospheric Physics,Nanjing University of Information Science and Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学大气物理学院,南京210044

出　　处：《三峡生态环境监测》2019年第1期56-60,共5页Ecology and Environmental Monitoring of Three Gorges

基　　金：江苏省研究生科研与实践创新计划项目(KYCX18_1027)

摘　　要：利用2013年5月至2014年5月的能见度、相对湿度、温度、风向风速等气象要素数据及气溶胶化学组分观测数据,分析了南京北郊能见度变化特征及其影响因子。研究表明:观测期间平均能见度为6.78 km,低能见度事件在冬季发生得更频繁。相对湿度和风速是影响能见度的主要气象因子,而大气中细颗粒物的增加是能见度降低的主要原因。颗粒物中不同化学组分对能见度的影响不同,随着能见度的降低,二次无机盐离子比例持续增加。大气中二次无机盐离子的增加是能见度降低的重要原因。The observed data of visibility,relative humidity,temperature,wind speed and aerosol chemical composition from May 2013 to May 2014 were used to analyze the variation characteristics of atmospheric visibility and its impact factors.This study suggests that the average visibility during the observation period was 6.78 km,and low visibility events occured more frequently in the winter.Relative humidity and wind speed were the dominant meteorological factors influencing the visibility,while the increase of fine particulate matter in the atmosphere were the main cause of visibility impairment.Different aerosol chemical components influenced the visibility quite differently.The visibility decreasesd with the increases of the secondary inorganic salt ions,which is a significant reason for visibility impairment.

关 键 词：大气能见度 气象因子 PM2.5 化学组分 

分 类 号：X513[环境科学与工程—环境工程]