气候变化领域集成服务门户(CCPortal): Decoupling of urban CO2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown

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DOI	10.5194/acp-21-3091-2021
	Decoupling of urban CO2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown
	Lamprecht C.; Graus M.; Striednig M.; Stichaner M.; Karl T.
发表日期	2021
ISSN	1680-7316
起始页码	3091
结束页码	3102
卷号	21 期号:4
英文摘要	Lockdown and the associated massive reduction in people's mobility imposed by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) mitigation measures across the globe provide a unique sensitivity experiment to investigate impacts on carbon and air pollution emissions. We present an integrated observational analysis based on long-term in situ multispecies eddy flux measurements, allowing for quantifying near-real-time changes of urban surface emissions for key air quality and climate tracers. During the first European SARS-CoV-2 wave we find that the emission reduction of classic air pollutants decoupled from CO2 and was significantly larger. These differences can only be rationalized by the different nature of urban combustion sources and point towards a systematic bias of extrapolated urban NOx emissions in state-of-the-art emission models. The analysis suggests that European policies, shifting residential, public, and commercial energy demand towards cleaner combustion, have helped to improve air quality more than expected and that the urban NOx flux remains to be dominated (e.g., > 90 %) by traffic. © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	air quality; atmospheric pollution; carbon dioxide; carbon emission; COVID-19; environmental policy; in situ test; public health; Europe; SARS coronavirus
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247101
作者单位	Department of Atmospheric and Cryospheric Sciences, University of Innsbruck, Innsbruck, Austria
推荐引用方式 GB/T 7714	Lamprecht C.,Graus M.,Striednig M.,et al. Decoupling of urban CO2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown[J],2021,21(4).
APA	Lamprecht C.,Graus M.,Striednig M.,Stichaner M.,&Karl T..(2021).Decoupling of urban CO2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Lamprecht C.,et al."Decoupling of urban CO2 and air pollutant emission reductions during the European SARS-CoV-2 lockdown".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).