Variations of the urban PM 2.5 chemical components and corresponding light extinction for three heating seasons in the Guanzhong Plain, China
In order to investigate the variations of PM (particulate matter with an aerodynamic diameter less than 2.5 μm) chemical components responding to the pollution control strategy and their effect on light extinction (b ) in the Guanzhong Plain (GZP), the comparisons of urban atmospheric chemical compo...
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Published in | Journal of environmental management Vol. 327; p. 116821 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
England
01.02.2023
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Subjects | |
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Abstract | In order to investigate the variations of PM
(particulate matter with an aerodynamic diameter less than 2.5 μm) chemical components responding to the pollution control strategy and their effect on light extinction (b
) in the Guanzhong Plain (GZP), the comparisons of urban atmospheric chemical components during the heating seasons were extensively conducted for three years. The average concentration of PM
decreased significantly from 117.9 ± 57.3 μg m
in the heating season 1 (HS1) to 53.5 ± 31.3 μg m
in the heating season 3 (HS3), which implied that the effective strategies were implemented in recent years. The greatest contribution to PM
(∼30%) was from Organic matter (OM). The heightened contributions of the secondary inorganic ions (SNA, including NO
, SO
, and NH
) to PM
were observed with the values of 34% (HS1), 41% (HS2), and 42% (HS3), respectively. The increased percentages of NO
contributions indicated that the emission of NOx should be received special attention in the GZP. The comparison of PM
chemical compositions and implications across major regions of China and the globe were investigated. NH
NO
was the most important contributor to b
in three heating seasons. The average b
was decreased from 694.3 ± 399.1 Mm
(HS1) to 359.3 ± 202.3 Mm
(HS3). PM
had a threshold concentration of 75 μg m
, 64 μg m
, and 57 μg m
corresponding to the visual range (VR) < 10 km in HS1, HS2, and HS3, respectively. The enhanced impacts of the oxidant on PM
and O
were observed based on the long-term variations in PM
and OX (Oxidant, the sum of O
and NO
mixing ratios) over the five heating seasons and PM
and O
over six summers from 2016 to 2021. The importance of coordinated control of PM
and O
was also investigated in the GZP. |
---|---|
AbstractList | In order to investigate the variations of PM
(particulate matter with an aerodynamic diameter less than 2.5 μm) chemical components responding to the pollution control strategy and their effect on light extinction (b
) in the Guanzhong Plain (GZP), the comparisons of urban atmospheric chemical components during the heating seasons were extensively conducted for three years. The average concentration of PM
decreased significantly from 117.9 ± 57.3 μg m
in the heating season 1 (HS1) to 53.5 ± 31.3 μg m
in the heating season 3 (HS3), which implied that the effective strategies were implemented in recent years. The greatest contribution to PM
(∼30%) was from Organic matter (OM). The heightened contributions of the secondary inorganic ions (SNA, including NO
, SO
, and NH
) to PM
were observed with the values of 34% (HS1), 41% (HS2), and 42% (HS3), respectively. The increased percentages of NO
contributions indicated that the emission of NOx should be received special attention in the GZP. The comparison of PM
chemical compositions and implications across major regions of China and the globe were investigated. NH
NO
was the most important contributor to b
in three heating seasons. The average b
was decreased from 694.3 ± 399.1 Mm
(HS1) to 359.3 ± 202.3 Mm
(HS3). PM
had a threshold concentration of 75 μg m
, 64 μg m
, and 57 μg m
corresponding to the visual range (VR) < 10 km in HS1, HS2, and HS3, respectively. The enhanced impacts of the oxidant on PM
and O
were observed based on the long-term variations in PM
and OX (Oxidant, the sum of O
and NO
mixing ratios) over the five heating seasons and PM
and O
over six summers from 2016 to 2021. The importance of coordinated control of PM
and O
was also investigated in the GZP. |
Author | Zhang, Ting Qu, Yao Zhang, Peiyun Dai, Wenting Zhu, Chongshu Li, Rui Liu, Suixin Cao, Junji Shi, Julian |
Author_xml | – sequence: 1 givenname: Julian surname: Shi fullname: Shi, Julian organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Xi'an Institute for Innovative Earth Environment Research, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 2 givenname: Suixin surname: Liu fullname: Liu, Suixin organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 3 givenname: Yao surname: Qu fullname: Qu, Yao organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 4 givenname: Ting surname: Zhang fullname: Zhang, Ting organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 5 givenname: Wenting surname: Dai fullname: Dai, Wenting organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 6 givenname: Peiyun surname: Zhang fullname: Zhang, Peiyun organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 7 givenname: Rui surname: Li fullname: Li, Rui organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Xi'an Institute for Innovative Earth Environment Research, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China – sequence: 8 givenname: Chongshu surname: Zhu fullname: Zhu, Chongshu email: chongshu@ieecas.cn organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China. Electronic address: chongshu@ieecas.cn – sequence: 9 givenname: Junji surname: Cao fullname: Cao, Junji organization: CAS Center for Excellence in Quaternary Science and Global Change, KLACP, and SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Shaanxi Key Laboratory of Atmospheric and Haze-fog Pollution Prevention, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; National Observation and Research Station of Regional Ecological Environment Change and Comprehensive Management in the Guanzhong Plain, Shaanxi, Xi'an, 710499, China |
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Keywords | Light extinction PM(2.5) pollution Chemical components Heating seasons the Guanzhong Plain |
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(particulate matter with an aerodynamic diameter less than 2.5 μm) chemical components responding to the pollution... |
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Title | Variations of the urban PM 2.5 chemical components and corresponding light extinction for three heating seasons in the Guanzhong Plain, China |
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