摘要
大气颗粒物污染是造成灰霾的主要原因.本文总结了大气颗粒物影响大气能见度的几个主要因素,即颗粒物的数浓度(或质量浓度)粒径分布、化学组分以及混合状态.我们认为,空气动力学粒径小于1μm的细颗粒物(PM1)是影响大气能见度最关键的大气成分.而要准确理解颗粒物的光学性质还必须结合颗粒物的化学组分及其混合状态来综合分析.
Particulate pollution in the atmosphere is the major reason of haze formation.This paper summarizes the characteristics of airborne particles which affect the atmospheric visibility the most,including size segregated number(or mass) concentration,chemical composition and mixing state.Among all the atmospheric components,PM1(particulate matter smaller than 1 μm) plays the most important role on impairing the visibility.Besides,knowledge of particles' chemical composition and mixing state are necessary to fully understand their optical properties.
出处
《科学通报》
EI
CAS
CSCD
北大核心
2013年第13期1165-1170,共6页
Chinese Science Bulletin
基金
国家自然科学基金(20937001
21177027
41275126)
上海市科委基础研究项目(12DJ1400100
10JC1402000)
复旦大学研究生创新基金资助
关键词
大气颗粒物
光学性质
PM1
化学组成
混合态
particulate matter
optical properties
PM1
chemical composition
mixing state