Variability of NO2 concentrations over China and effect on air quality derived from satellite and ground-based observations
Cheng Fan,Zhengqiang Li,Ying Li,Jiantao Dong,Ronald van der A,and Gerrit de Leeuw
Cheng Fan
State Environment Protection Key Laboratory of Satellite Remote
Sensing, Aerospace Information Research Institute, Chinese Academy of
Sciences, Beijing 100101, China
University of Chinese Academy of Sciences, Beijing 100049, China
Zhengqiang Li
State Environment Protection Key Laboratory of Satellite Remote
Sensing, Aerospace Information Research Institute, Chinese Academy of
Sciences, Beijing 100101, China
State Environment Protection Key Laboratory of Satellite Remote
Sensing, Aerospace Information Research Institute, Chinese Academy of
Sciences, Beijing 100101, China
Royal Netherlands Meteorological Institute (KNMI), R&D Satellite
Observations, 3731GA De Bilt, the Netherlands
Nanjing University of Information Science and Technology (NUIST),
School of Atmospheric Physics, No. 219, Ningliu Road, Nanjing, Jiangsu, China
China University of Mining and Technology (CUMT), School of Environment
Science and Spatial Informatics, Xuzhou, Jiangsu 221116, China
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Emission control policy in China has resulted in the decrease of nitrogen dioxide concentrations, which however leveled off and stabilized in recent years, as shown from satellite data. The effects of the further emission reduction during the COVID-19 lockdown in 2020 resulted in an initial improvement of air quality, which, however, was offset by chemical and meteorological effects. The study shows the regional dependence over east China, and results have a wider application than China only.
Emission control policy in China has resulted in the decrease of nitrogen dioxide...
