Untangling the contributions of meteorological conditions and human mobility to tropospheric NO2 in Chinese mainland during the COVID-19 pandemic in early 2020
Untangling the contributions of meteorological conditions and human mobility to tropospheric NO2 in Chinese mainland during the COVID-19 pandemic in early 2020作者机构：School of Earth and Space SciencesUniversity of Science and Technology of China Comparative Planetary Excellence Innovation CenterFrontiers Science Center for Planetary Exploration and Emerging Technologies Chinese Academy of Sciences State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Jiangxi Ecological Environment Monitoring Center Green Earth Science and Education Service
出 版 物：《National Science Review》 (国家科学评论(英文版))
年 卷 期：2021年第8卷第11期
页 面：121-132页
核心收录：
学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学]
基 金：supported by the National Key Research and Development Program of China (2017YFC1501402) the National Natural Science Foundation of China (41830104, 41661144007and 41675022) the Hundred Talents Program of the Chinese Academy of Sciences the Jiangsu Provincial 2011 Program(Collaborative Innovation Center of Climate Change)
主 题：atmospheric nitrogen dioxide anthropogenic emissions meteorology conditions human mobility COVID-19 quarantine
摘 要：In early 2020,unprecedented lockdowns and travel bans were implemented in Chinese mainland to fight COVID-19,which led to a large reduction in anthropogenic *** provided a unique opportunity to isolate the effects from emission and meteorology on tropospheric nitrogen dioxide（NO;2;）.Comparing the atmospheric NO;2;in 2020 with that in 2017,we found the changes of emission have led to a49.3±23.5% reduction,which was～12% more than satellite-observed reduction of 37.8±16.3%.The discrepancy was mainly a result of changes of meteorology,which have contributed to an 8.1±14.2%increase of NO;2;.We also revealed that the emission-induced reduction of NO;2;has significantly negative correlations to human mobility,particularly that inside the *** intra-city migration index derived from Baidu Location-Based-Service can explain 40.4%±17.7% variance of the emission-induced reduction of NO;2;in 29 megacities,each of which has a population of over 8 million in Chinese mainland.
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