Increasing atmospheric oxidizing capacity weakens emission mitigation effort in Beijing during autumn haze events

Tian Feng; Shuyu Zhao; Naifang Bei; Suixin Liu; Guohui Li

doi:10.1016/j.chemosphere.2021.130855

Increasing atmospheric oxidizing capacity weakens emission mitigation effort in Beijing during autumn haze events

Tian Feng
, Shuyu Zhao
, Naifang Bei
, Suixin Liu
, Guohui Li

人居环境与建筑工程学院

Ningbo University
CAS - Institute of Earth Environment
Chinese Academy of Sciences

科研成果: 期刊稿件 › 文章 › 同行评审

28 引用（Scopus）

摘要

Although strict mitigation measures have been implemented since 2013 in Beijing-Tianjin-Hebei (BTH), China, air pollution still frequently occurs. Observations reveal that during pollution episodes in autumn, fine particulate matter (PM_2.5) concentrations have not decreased, and particularly, ozone (O₃) concentrations have increased remarkably from 2013 to 2015 in Beijing. Additionally, a concurrence of O₃ and particulate pollution with high secondary aerosol contributions has been observed frequently, indicating high atmospheric oxidizing capacity (AOC) during particulate pollution. The WRF-Chem model simulations show elevated O₃ concentrations and high fractions of oxygenated secondary aerosols (OSA) in PM_2.5 (0.53–0.73) during the severe pollution period. During daytime there exhibits an AOC-sufficient regime with the persistently high OSA fraction and an AOC-deficient regime with varied OSA fractions, separated by the O₃ level of 80 μg m⁻³.

源语言	英语
文章编号	130855
期刊	Chemosphere
卷	281
DOI	https://doi.org/10.1016/j.chemosphere.2021.130855
出版状态	已出版 - 10月 2021

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title = "Increasing atmospheric oxidizing capacity weakens emission mitigation effort in Beijing during autumn haze events",

abstract = "Although strict mitigation measures have been implemented since 2013 in Beijing-Tianjin-Hebei (BTH), China, air pollution still frequently occurs. Observations reveal that during pollution episodes in autumn, fine particulate matter (PM2.5) concentrations have not decreased, and particularly, ozone (O3) concentrations have increased remarkably from 2013 to 2015 in Beijing. Additionally, a concurrence of O3 and particulate pollution with high secondary aerosol contributions has been observed frequently, indicating high atmospheric oxidizing capacity (AOC) during particulate pollution. The WRF-Chem model simulations show elevated O3 concentrations and high fractions of oxygenated secondary aerosols (OSA) in PM2.5 (0.53–0.73) during the severe pollution period. During daytime there exhibits an AOC-sufficient regime with the persistently high OSA fraction and an AOC-deficient regime with varied OSA fractions, separated by the O3 level of 80 μg m−3.",

keywords = "Atmospheric oxidizing capacity, PM, Secondary aerosol, WRF-Chem",

author = "Tian Feng and Shuyu Zhao and Naifang Bei and Suixin Liu and Guohui Li",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = oct,

doi = "10.1016/j.chemosphere.2021.130855",

language = "英语",

volume = "281",

journal = "Chemosphere",

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TY - JOUR

T1 - Increasing atmospheric oxidizing capacity weakens emission mitigation effort in Beijing during autumn haze events

AU - Feng, Tian

AU - Zhao, Shuyu

AU - Bei, Naifang

AU - Liu, Suixin

AU - Li, Guohui

PY - 2021/10

Y1 - 2021/10

N2 - Although strict mitigation measures have been implemented since 2013 in Beijing-Tianjin-Hebei (BTH), China, air pollution still frequently occurs. Observations reveal that during pollution episodes in autumn, fine particulate matter (PM2.5) concentrations have not decreased, and particularly, ozone (O3) concentrations have increased remarkably from 2013 to 2015 in Beijing. Additionally, a concurrence of O3 and particulate pollution with high secondary aerosol contributions has been observed frequently, indicating high atmospheric oxidizing capacity (AOC) during particulate pollution. The WRF-Chem model simulations show elevated O3 concentrations and high fractions of oxygenated secondary aerosols (OSA) in PM2.5 (0.53–0.73) during the severe pollution period. During daytime there exhibits an AOC-sufficient regime with the persistently high OSA fraction and an AOC-deficient regime with varied OSA fractions, separated by the O3 level of 80 μg m−3.

AB - Although strict mitigation measures have been implemented since 2013 in Beijing-Tianjin-Hebei (BTH), China, air pollution still frequently occurs. Observations reveal that during pollution episodes in autumn, fine particulate matter (PM2.5) concentrations have not decreased, and particularly, ozone (O3) concentrations have increased remarkably from 2013 to 2015 in Beijing. Additionally, a concurrence of O3 and particulate pollution with high secondary aerosol contributions has been observed frequently, indicating high atmospheric oxidizing capacity (AOC) during particulate pollution. The WRF-Chem model simulations show elevated O3 concentrations and high fractions of oxygenated secondary aerosols (OSA) in PM2.5 (0.53–0.73) during the severe pollution period. During daytime there exhibits an AOC-sufficient regime with the persistently high OSA fraction and an AOC-deficient regime with varied OSA fractions, separated by the O3 level of 80 μg m−3.

KW - Atmospheric oxidizing capacity

KW - PM

KW - Secondary aerosol

KW - WRF-Chem

UR - https://www.scopus.com/pages/publications/85107120223

U2 - 10.1016/j.chemosphere.2021.130855

DO - 10.1016/j.chemosphere.2021.130855

M3 - 文章

C2 - 34289598

AN - SCOPUS:85107120223

SN - 0045-6535

VL - 281

JO - Chemosphere

JF - Chemosphere

M1 - 130855

ER -

Increasing atmospheric oxidizing capacity weakens emission mitigation effort in Beijing during autumn haze events

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