灾害学2016，Vol.31Issue(3)：95-100,109,7.DOI:10.3969/j.issn.1000-811X.2016.03.016
青奥会期间南京市雾霾灾害事件及气溶胶特性分析
Study on Characteristics of Aerosols during Nanjing Youth Olympic Games
摘要
Abstract
Aerosols have major impacts on visibility,human health,and climate.During the field observation in Nanjing Meteorological Bureau last summer,SMPS and APMare used to measure microphysical characteristics of aerosols,including particle number concentration,size distribution,density,mixing state,black carbon.During the measurement period,the particle size ranges from 50nm to 120 nm,and the average particle size is 79 nm.The total concentration varies between 2000 cm -3 ~50 000 cm -3 ,and the average concentration is around 9000 cm -3 . The new particle formation has little occurrence during this period.Aerosols are often internally mixed,while the externally mixed aerosols only account for 1.5%.The particles’density mainly concentrates between 1.2 ~1.7 g/cm3 .The density increases with the particle size,indicating a large mass fraction of sulfate and a small concentra-tion of organics in larger particles.The density shows a distinctive diurnal cycle,which corresponds to the diurnal cycle of chemical compositions.70% of aerosols containing black carbon,BC mass fraction increase with particle size,reaching a peak at 200 nm,then decreases.The meteorological factors have a significant effect on aerosol properties.关键词
气溶胶/粒径谱分布/雾霾/混合状态/南京Key words
aerosol/particle size distribution/fog/mixing state分类
资源环境引用本文复制引用
于文金,于步云,苏荣,谢涛..青奥会期间南京市雾霾灾害事件及气溶胶特性分析[J].灾害学,2016,31(3):95-100,109,7.基金项目
国家重大科学研究计划项目（2013CB430202）；国家自然科学基金（41276187）；江苏高校优势学科建设工程资助项目 （）
