气候变化领域集成服务门户(CCPortal): Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change

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DOI	10.1073/pnas.2109481118
	Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change
	Laughner J.L.; Neu J.L.; Schimel D.; Wennberg P.O.; Barsanti K.; Bowman K.W.; Chatterjee A.; Croes B.E.; Fitzmaurice H.L.; Henze D.K.; Kim J.; Kort E.A.; Liu Z.; Miyazaki K.; Turner A.J.; Anenberg S.; Avise J.; Cao H.; Crisp D.; De Gouw J.; Eldering A.; Fyfe J.C.; Goldberg D.L.; Gurney K.R.; Hasheminassab S.; Hopkins F.; Ivey C.E.; Jones D.B.A.; Liu J.; Lovenduski N.S.; Martin R.V.; McKinley G.A.; Ott L.; Poulter B.; Ru M.; Sander S.P.; Swart N.; Yung Y.L.; Zeng Z.-C.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:46
英文摘要	The COVID-19 global pandemic and associated government lockdowns dramatically altered human activity, providing a window into how changes in individual behavior, enacted en masse, impact atmospheric composition. The resulting reductions in anthropogenic activity represent an unprecedented event that yields a glimpse into a future where emissions to the atmosphere are reduced. Furthermore, the abrupt reduction in emissions during the lockdown periods led to clearly observable changes in atmospheric composition, which provide direct insight into feedbacks between the Earth system and human activity. While air pollutants and greenhouse gases share many common anthropogenic sources, there is a sharp difference in the response of their atmospheric concentrations to COVID-19 emissions changes, due in large part to their different lifetimes. Here, we discuss several key takeaways from modeling and observational studies. First, despite dramatic declines in mobility and associated vehicular emissions, the atmospheric growth rates of greenhouse gases were not slowed, in part due to decreased ocean uptake of CO2 and a likely increase in CH4 lifetime from reduced NOx emissions. Second, the response of O3 to decreased NOx emissions showed significant spatial and temporal variability, due to differing chemical regimes around the world. Finally, the overall response of atmospheric composition to emissions changes is heavily modulated by factors including carbon-cycle feedbacks to CH4 and CO2, background pollutant levels, the timing and location of emissions changes, and climate feedbacks on air quality, such as wildfires and the ozone climate penalty. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Air quality; COVID-19; Earth system; Greenhouse gases; Mitigation
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238309
作者单位	Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, United States; Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, United States; Center for Environmental Research and Technology, Riverside, CA 92507, United States; Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD 21046, United States; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Energy Research and Development Division, California Energy Commission, Sacramento, CA 95814, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO 80309, United States; Department of...
推荐引用方式 GB/T 7714	Laughner J.L.,Neu J.L.,Schimel D.,et al. Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change[J],2021,118(46).
APA	Laughner J.L..,Neu J.L..,Schimel D..,Wennberg P.O..,Barsanti K..,...&Zeng Z.-C..(2021).Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change.Proceedings of the National Academy of Sciences of the United States of America,118(46).
MLA	Laughner J.L.,et al."Societal shifts due to COVID-19 reveal large-scale complexities and feedbacks between atmospheric chemistry and climate change".Proceedings of the National Academy of Sciences of the United States of America 118.46(2021).