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中国科学院大学学报 ›› 2013, Vol. 30 ›› Issue (6): 757-762.DOI: 10.7523/j.issn.2095-6134.2013.06.007

• 环境科学与地理学 • 上一篇    下一篇

成都城区颗粒物消光系数特征及其与PM2.5的关系

宋丹林1, 陶俊2, 张普1, 周子航1, 李从庆1, 周来东1   

  1. 1. 成都市环境保护科学研究院, 成都 610072;
    2. 环境保护部华南环境科学研究所, 广州 510655
  • 收稿日期:2013-03-04 修回日期:2013-05-03 发布日期:2013-11-15
  • 通讯作者: 陶俊
  • 基金资助:

    国家环境保护公益性行业科研专项(201009001)资助

Seasonal characterization of particle extinction coefficient and its relation with PM2.5 mass concentration in Chengdu

SONG Dan-Lin1, TAO Jun2, ZHANG Pu1, ZHOU Zi-Hang1, LI Cong-Qing1, ZHOU Lai-Dong1   

  1. 1. Chengdu Research Academy of Environmental Sciences, Chengdu 610072, China;
    2. South China Institute of Environmental Sciences, MEP, Guangzhou 510655, China
  • Received:2013-03-04 Revised:2013-05-03 Published:2013-11-15

摘要:

为进一步了解成都城区霾天气成因,收集2011年成都城区大气细颗粒物(PM2.5)质量浓度,以及同步的颗粒物散射系数(bsp)和颗粒物吸收系数(bap)资料,探讨bspbap季节和日变化特征,以及大气消光系数(bext=bsp+bap)与PM2.5之间关系.结果发现,成都城区bspbap年均值分别为(456±237) Mm-1和(96±73) Mm-1,其中bsp日变化主要受到气象条件和郊区污染源输送的影响,bap日变化主要受到气象条件和本地移动源的影响.PM2.5bext呈现较好的线性关系(R2>0.92),表明PM2.5是导致成都霾天气的主要因素.

关键词: 霾, 颗粒物散射系数, 颗粒物吸收系数, 颗粒物消光系数, PM2.5

Abstract:

Daily PM2.5 samples were collected in Chengdu for a period of one month in each of the seasons of 2011. Particle scattering coefficient and particle absorption coefficient were synchronously measured. The seasonal and daily variations in bsp and bap and the relation between bext (bsp+bap) and the PM2.5 mass concentration was discussed based on above-measured data to investigate the causes of hazy weather. The results show that the annual bsp and bap values were (456±237) Mm-1 and (96±73) Mm-1, respectively, and that daily variation in bsp was influenced by metoroligical factors and transpotation of polltants from Chengdu suburban while daily variation in bap was influenced by metoroligical factors and local motor emission in the urban aera. Good correlation between PM2.5 and bext was found (R2>0.92), which suggests that the higher PM2.5 concentration is the key impact factor for hazy weather.

Key words: haze, particle scattering coefficient, particle absorption coefficient, particle extinction coefficient, PM2.5

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