Characteristics of complex air pollution in typical cities of North China
The Beijing-Tianjin-Hebei urban agglomeration is currently facing severe complex air pollution. In this paper, simultaneous observations conducted in 2014 show that the annual mean concentration of fine particulate matter (PM 2.5 ) was 84 ± 70, 86 ± 60, and 118 ± 95 μg m −3 in Beijing, Tianjin, and...
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Published in | Atmospheric and oceanic science letters = Daqi-he-haiyang-kexue-kuaibao Vol. 11; no. 1; pp. 29 - 36 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Beijing
Taylor & Francis
02.01.2018
KeAi Publishing Communications Ltd KeAi Communications Co., Ltd |
Subjects | |
Online Access | Get full text |
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Summary: | The Beijing-Tianjin-Hebei urban agglomeration is currently facing severe complex air pollution. In this paper, simultaneous observations conducted in 2014 show that the annual mean concentration of fine particulate matter (PM
2.5
) was 84 ± 70, 86 ± 60, and 118 ± 95 μg m
−3
in Beijing, Tianjin, and Shijiazhuang, respectively. The mean O
3_8 h max
in the summer was 171 ± 43, 147 ± 45, and 146 ± 44 μg m
−3
, respectively. This research indicates that PM
2.5
and O
3
are positively correlated when the temperature exceeds 20 °C, and the urban agglomeration shows characteristics of complex air pollution consisting of superimposed O
3
and PM
2.5
. In summer, when the humidity was less than 55%, secondary particles and O
3
also increased in a coordinated manner (y = 1.35x + 29.85; R
2
= 0.61), which demonstrates severe complex pollution. However, the mean PM
2.5
(y) and mean O
3_8 h max
(x) in summer showed a negative correlation (y = −1.3x + 245; R
2
= 0.61) in the three regions, indicating high concentrations of PM
2.5
pollution partially inhibit O
3
generation. |
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ISSN: | 1674-2834 2376-6123 |
DOI: | 10.1080/16742834.2018.1394158 |