Evaluation of regional background particulate matter concentration based on vertical distribution characteristics

Heavy regional particulate matter (PM) pollution in China has resulted in an important and urgent need for joint control actions among cities. It is advisable to improve the understanding of the regional background concentration of PM for the development of efficient and effective joint control poli...

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Bibliographic Details
Published in:Atmospheric chemistry and physics 2015-10, Vol.15 (19), p.11165-11177
Main Authors: Han, S, Zhang, Y, Wu, J, Zhang, X, Tian, Y, Wang, Y, Ding, J, Yan, W, Bi, X, Shi, G, Cai, Z, Yao, Q, Huang, H, Feng, Y
Format: Article
Language:English
Subjects:
Air pollution
Air quality
Atmospheric boundary layer
Boundary layer structure
Boundary layers
Chemical composition
Chemical pollution
Chemical reactions
Cluster analysis
Concentration (composition)
Distribution
Emissions
Environmental impact
Industrial development
Outdoor air quality
Particle mass
Particle size
Particle size distribution
Particulate emissions
Particulate matter
Periodic variations
Policies
Pollutants
Pollution abatement
Pollution sources
Principal components analysis
Regional
Regional analysis
Regional development
Suspended particulate matter
Vertical distribution
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Summary:Heavy regional particulate matter (PM) pollution in China has resulted in an important and urgent need for joint control actions among cities. It is advisable to improve the understanding of the regional background concentration of PM for the development of efficient and effective joint control policies. With the increase of height the influence of source emission on local air quality decreases with altitude, but the characteristics of regional pollution gradually become obvious. A method to estimate regional background PM concentration is proposed in this paper, based on the vertical characteristics of periodic variation in the atmospheric boundary layer structure and particle mass concentration, as well as the vertical distribution of particle size, chemical composition and pollution source apportionment. According to the method, the averaged regional background PM2.5 concentration in July, August and September 2009, being extracted from the original time series in Tianjin, was 40 plus or minus 20, 64 plus or minus 17 and 53 plus or minus 11 mu g m-3, respectively.
ISSN:1680-7324
1680-7316
1680-7324
DOI:10.5194/acp-15-11165-2015