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Impacts of COVID-19 on Black Carbon in Two Representative Regions in China: Insights Based on Online Measurement in Beijing and Tibet.
Liu, Yue; Wang, Yinan; Cao, Yang; Yang, Xi; Zhang, Tianle; Luan, Mengxiao; Lyu, Daren; Hansen, Anthony D A; Liu, Baoxian; Zheng, Mei.
  • Liu Y; State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China.
  • Wang Y; Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China.
  • Cao Y; Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring Center Beijing China.
  • Yang X; State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China.
  • Zhang T; State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China.
  • Luan M; State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing China.
  • Lyu D; Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China.
  • Hansen ADA; Magee Scientific Berkeley CA USA.
  • Liu B; Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring Center Beijing China.
  • Zheng M; School of Environment Tsinghua University Beijing China.
Geophys Res Lett ; 48(11): e2021GL092770, 2021 Jun 16.
Article in English | MEDLINE | ID: covidwho-1294437
ABSTRACT
Under the influence of Coronavirus Disease 2019 (COVID-19), China conducted a nationwide lockdown (LD) which significantly reduced anthropogenic emissions. To analyze the different impacts of COVID-19 on black carbon (BC) in the two representative regions in China, one-year continuous online measurements of BC were conducted simultaneously in Beijing and Tibet. The average concentration in the LD period was 20% higher than that in the pre-LD period in Beijing, which could be attributed to the increase of transport from southwestern neighboring areas and enhanced aged BC. In contrast to megacity, the average concentration of BC in Tibet decreased over 70% in the LD period, suggesting high sensitivity of plateau background areas to the anthropogenic emission reduction in South Asia. Our study clearly showed that BC responded very differently in megacity and background areas to the change of anthropogenic emission under the lockdown intervention.

Full text: Available Collection: International databases Database: MEDLINE Type of study: Experimental Studies Language: English Journal: Geophys Res Lett Year: 2021 Document Type: Article

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Full text: Available Collection: International databases Database: MEDLINE Type of study: Experimental Studies Language: English Journal: Geophys Res Lett Year: 2021 Document Type: Article