Articles | Volume 21, issue 2
https://doi.org/10.5194/acp-21-915-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-21-915-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
22 Jan 2021
Research article |
| 22 Jan 2021
| 22 Jan 2021
Enhancement of secondary aerosol formation by reduced anthropogenic emissions during Spring Festival 2019 and enlightenment for regional PM2.5 control in Beijing
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
Zhanqing Li
Earth System Science Interdisciplinary Center, Department of
Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USA
Qiuyan Wang
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
Xiaoai Jin
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
Peng Yan
CMA Meteorological Observation Center, Centre for Atmosphere Watch and Services, Beijing 100081, China
Maureen Cribb
Earth System Science Interdisciplinary Center, Department of
Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USA
Yanan Li
CMA Meteorological Observation Center, Centre for Atmosphere Watch and Services, Beijing 100081, China
Cheng Yuan
Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China
Hao Wu
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
Tong Wu
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
Rongmin Ren
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
Zhaoxin Cai
State Key Laboratory of Remote Sensing Science, Beijing Normal
University, Beijing 100875, China
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We discussed the different aerosol effects on lightning in plateau and basin regions of Sichuan, southwestern China. In the plateau area, the aerosol concentration is low, and aerosols (via microphysical effects) inhibit the process of warm rain and stimulate convection and lightning activity. In the basin region, however, aerosols tend to show a significant radiative effect (reducing the solar radiation reaching the surface by absorbing and scattering) and inhibit the lightning.
Xinghong Cheng, Jianzhong Ma, Junli Jin, Junrang Guo, Yuelin Liu, Jida Peng, Xiaodan Ma, Minglong Qian, Qiang Xia, and Peng Yan
Atmos. Chem. Phys., 20, 10757–10774, https://doi.org/10.5194/acp-20-10757-2020, https://doi.org/10.5194/acp-20-10757-2020, 2020
Short summary
Short summary
We carried out 19 city-circle-around Car MAX-DOAS experiments on the 6th Ring Road of Beijing in Jan, Sep, and Oct 2014. The tropospheric VCDs of NO2 are retrieved and their temporal and spatial distributions are investigated. Then the NOx emission rates in urban Beijing are estimated using the measured NO2 VCDs together with the refined wind fields, NO2-to-NOx ratios, and NO2 lifetimes simulated by the LAPS-WRF-CMAQ model system, and results are compared with the MEIC inventory in 2012.
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Short summary
The unexpected increase in surface ozone concentration was found along with the reduced anthropogenic emissions during the 2019 Chinese Spring Festival in Beijing. The enhanced atmospheric oxidation capacity could promote the formation of secondary aerosols, especially sulfate, which offset the decrease in PM2.5 mass concentration. This phenomenon was likely to exist throughout the entire Beijing–Tianjin–Hebei (BTH) region to be a contributing factor to the haze during the COVID-19 lockdown.
The unexpected increase in surface ozone concentration was found along with the reduced...
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