Analyses of regional pollution and transportation of PM2.5 and ozone in the city clusters of Sichuan Basin, China

Regional PM2.5 and ozone pollution and inter-city transportation in the city clusters of the Sichuan Basin (SB) were revealed using k-means clustering and the HYSPLIT backward trajectory model. The PSCF (potential source contribution function) and CWT (concentration-weighted trajectory) methods also...

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Published inAtmospheric pollution research Vol. 10; no. 2; pp. 374 - 385
Main Authors Zhao, Suping, Yu, Ye, Qin, Dahe, Yin, Daiying, Dong, Longxiang, He, Jianjun
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2019
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ISSN1309-1042
1309-1042
DOI10.1016/j.apr.2018.08.014

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Abstract Regional PM2.5 and ozone pollution and inter-city transportation in the city clusters of the Sichuan Basin (SB) were revealed using k-means clustering and the HYSPLIT backward trajectory model. The PSCF (potential source contribution function) and CWT (concentration-weighted trajectory) methods also were used to identify potential source regions of PM2.5 and ozone in the basin. The regional PM2.5 pollution was obvious with high levels at western and southern SB, while regional pollution characteristics of ozone were less significant than that of PM2.5 inside the basin. Additionally, PM2.5 was often transported directionally from one city to another city, while regional transportation of ozone was less significant than PM2.5 inside the basin, which may be related to the fact that ozone reacted easily with primary emissions during transportation. The Tibetan Plateau (TP) also may be an important source region of high ozone in the city clusters of Sichuan Basin, especially west part of the basin. The results will provide advice to the government to take measures in improving air quality of SB. •Regional pollution and transportation were studied in city clusters of Sichuan Basin.•Clustering analysis and HYSPLIT model were used.•Regional pollution characteristic of ozone was less significant than those of PM2.5.•Tibetan Plateau may be an important source region of high ozone in the Basin.
AbstractList Regional PM2.5 and ozone pollution and inter-city transportation in the city clusters of the Sichuan Basin (SB) were revealed using k-means clustering and the HYSPLIT backward trajectory model. The PSCF (potential source contribution function) and CWT (concentration-weighted trajectory) methods also were used to identify potential source regions of PM2.5 and ozone in the basin. The regional PM2.5 pollution was obvious with high levels at western and southern SB, while regional pollution characteristics of ozone were less significant than that of PM2.5 inside the basin. Additionally, PM2.5 was often transported directionally from one city to another city, while regional transportation of ozone was less significant than PM2.5 inside the basin, which may be related to the fact that ozone reacted easily with primary emissions during transportation. The Tibetan Plateau (TP) also may be an important source region of high ozone in the city clusters of Sichuan Basin, especially west part of the basin. The results will provide advice to the government to take measures in improving air quality of SB. •Regional pollution and transportation were studied in city clusters of Sichuan Basin.•Clustering analysis and HYSPLIT model were used.•Regional pollution characteristic of ozone was less significant than those of PM2.5.•Tibetan Plateau may be an important source region of high ozone in the Basin.
Author Yu, Ye
Dong, Longxiang
Zhao, Suping
Qin, Dahe
Yin, Daiying
He, Jianjun
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Keywords Sichuan Basin
Ozone
Clustering analysis
Regional pollution
HYSPLIT
PM2.5
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Snippet Regional PM2.5 and ozone pollution and inter-city transportation in the city clusters of the Sichuan Basin (SB) were revealed using k-means clustering and the...
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elsevier
SourceType Enrichment Source
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Publisher
StartPage 374
SubjectTerms Clustering analysis
HYSPLIT
Ozone
PM2.5
Regional pollution
Sichuan Basin
Title Analyses of regional pollution and transportation of PM2.5 and ozone in the city clusters of Sichuan Basin, China
URI https://dx.doi.org/10.1016/j.apr.2018.08.014
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