主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报

• 论文 • 上一篇    下一篇

上海市大气颗粒物与能见度的关系

姚剑1;王广华1;林俊1;范雪波1;耿彦红1;位楠楠2;单健2;李燕1;刘卫1   

  1. 1.中国科学院上海应用物理研究所核分析技术重点实验室,上海 201800;2. 南华大学核科学技术学院,湖南 衡阳 421001
  • 收稿日期:2010-02-01 修回日期:2010-05-27 出版日期:2010-08-29 发布日期:2010-08-29

Relationships between atmospheric particles and visibility in Shanghai

YAO Jian1;WANG Guang-hua1;LIN Jun1;FAN Xue-bo1;GENG Yan-hong1;WEI Nan-nan2;SHAN Jian2;LI Yan1;LIU Wei1   

  1. 1. Key Laboratory of Nuclear Analysis Techniques, Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Shanghai 201800, China;2. School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
  • Received:2010-02-01 Revised:2010-05-27 Online:2010-08-29 Published:2010-08-29

摘要: 大气能见度成为当前区域大气环境研究的重要指标,不同粒径的颗粒物对能见度的影响有着显著的区别。本研究在线连续监测了上海市嘉定区2008年11月—2009年1月不同粒径大气颗粒物质量浓度和粒子数浓度的日变化,同步收集了相同区域空气水平能见度的数据。比较不同粒径大气颗粒物质量浓度与空气水平能见度和颗粒物消光系数的相关性,结果表明:中值粒径为0.4 μm和0.65 μm的大气颗粒物对上海嘉定空气水平能见度的影响最显著;中值粒径为0.17 μm、0.26 μm、0.40 μm和0.65 μm的大气颗粒物对颗粒物的消光系数影响较大。该相关系数的分布趋势与各种组分(SO42-、NO3-、NH4+、OC和EC)的粒径分布十分一致,证明了这五种组分是影响大气颗粒物消光系数的重要原因。

关键词: 大气颗粒物质量浓度, 粒径分布, 空气水平能见度, 相关性, 消光系数

Abstract: Atmospheric visibility becomes an important indicator of regional atmospheric environment study, and the effects of atmospheric particles on visibility are significantly different because of their different sizes. The daily mass and number concentrations for atmospheric particles of different sizes were monitored from November 2008 to January 2009 in Jiading district of Shanghai. The visibility was also collected synchronously in the same region. Correlations of the mass concentration for atmospheric particles of different sizes with horizontal visibility and extinction coefficient of particles were analyzed. The results indicate that the effects of atmospheric particles with 0.4 μm and 0.65 μm medium diameters on horizontal visibility are significant, so is with 0.17 μm, 0.26 μm, 0.40 μm and 0.65 μm medium diameters on extinction coefficient. The distributions of correlation coefficients are consistent with size distributions of five components (SO42-, NO3-, NH4+, OC and EC) of atmospheric particles, which suggests that five components may be the important influencing factors of extinction coefficient.

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