摘要
于2008年春季采用粒径谱仪和自动气象站等高分辨率仪器对广州城区大气颗粒物的粒径分布特征及其与大气能见度的相互关系进行研究.结果发现,0.5～20μm粒径范围的颗粒物数浓度随粒径增大而逐渐减小;质量浓度谱分布呈双峰型,分别在0.7μm和2.5μm出现峰值;而降雨对粗颗粒物的去除作用显著.0.5～2.5μm粒子浓度增加是大气能见度降低的重要原因.
High resolution instruments were used to investigate the atmospheric particles distribution characteristics and the impacts on visibility in urban Guangzhou during spring 2008. We found that the particle number density decreased while particle size was growing, along the mass concentration profile there existed two peaks at 0.7μm and 2.5μm, and the rainfall had great effects on scavenging of coarse particles. The rising concentration of those ranging from 0.5μm to 2.5μm was the important reason for the degraded visibility.
出处
《中国科学院研究生院学报》
CAS
CSCD
北大核心
2010年第3期331-337,共7页
Journal of the Graduate School of the Chinese Academy of Sciences
基金
中国科学院知识创新工程领域前沿项目(IAP09320)
中央级公益科研院所基本科研业务专项基金(ZX20080905)
广东省科技攻关项目(2007B030102004)资助
关键词
大气颗粒物
数浓度
质量浓度
粒径分布
能见度
particle mass
number density
mass concentration
size distribution
visibility
