Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Institute of Eco-Chongming, 3663 N. Zhongshan Rd., Shanghai 200062,
China
Xinpei Wang
Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Institute of Eco-Chongming, 3663 N. Zhongshan Rd., Shanghai 200062,
China
Department of Environmental Science and Technology, Fudan University,
Shanghai 200438, China
Yubao Chen
Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Guiqian Tang
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of
Sciences, Beijing 100080, China
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of
Sciences, Beijing 100080, China
Shuangshuang Ge
Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Guoyan Xue
Key Laboratory of Geographic Information Science of the Ministry of
Education, School of Geographic Sciences, East China Normal University,
Shanghai 200241, China
Yuesi Wang
State Key Laboratory of Atmospheric Boundary Layer Physics and
Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of
Sciences, Beijing 100080, China
Jian Gao
Chinese Research Academy of Environmental Sciences, Beijing 100000,
China
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468
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3,107
1,076
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283
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As a result of strict emission control, nitrate-dominated PM2.5 in pollution episodes was observed in urban Beijing during the winter of 2017–2018. With the help of sufficient ammonia, particle pH could increase to near neutral (5.4) as particulate nitrate fraction increases. Further tests imply that airborne particle hygroscopicity would be enhanced at moderate RH in nitrate-dominated particles, and pH elevation will be accelerated when ammonia and particulate nitrate both increase.
As a result of strict emission control, nitrate-dominated PM2.5 in pollution episodes was...
