气候变化领域集成服务门户(CCPortal): Minimal Climate Impacts From Short-Lived Climate Forcers Following Emission Reductions Related to the COVID-19 Pandemic

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DOI	10.1029/2020GL090326
	Minimal Climate Impacts From Short-Lived Climate Forcers Following Emission Reductions Related to the COVID-19 Pandemic
	Weber J.; Shin Y.M.; Staunton Sykes J.; Archer-Nicholls S.; Abraham N.L.; Archibald A.T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	We present an assessment of the impacts on atmospheric composition and radiative forcing of short-lived pollutants following a worldwide decrease in anthropogenic activity and emissions comparable to what has occurred in response to the COVID-19 pandemic, using the global composition-climate model United Kingdom Chemistry and Aerosols Model (UKCA). Emission changes reduce tropospheric hydroxyl radical and ozone burdens, increasing methane lifetime. Reduced SO2 emissions and oxidizing capacity lead to a decrease in sulfate aerosol and increase in aerosol size, with accompanying reductions to cloud droplet concentration. However, large reductions in black carbon emissions increase aerosol albedo. Overall, the changes in ozone and aerosol direct effects (neglecting aerosol-cloud interactions which were statistically insignificant but whose response warrants future investigation) yield a radiative forcing of −33 to −78 mWm−2. Upon cessation of emission reductions, the short-lived climate forcers rapidly return to pre-COVID levels; meaning, these changes are unlikely to have lasting impacts on climate assuming emissions return to pre-intervention levels. ©2020. The Authors.
英文关键词	Aerosols; Air pollution; Atmospheric chemistry; Atmospheric composition; Atmospheric radiation; Emission control; Ozone; Particulate emissions; Sulfur dioxide; Aerosol-cloud interaction; Anthropogenic activity; Black carbon emission; Emission reduction; Hydroxyl radicals; Oxidizing capacity; Radiative forcings; Sulfate aerosols; Climate models; aerosol; black carbon; climate effect; climate forcing; cloud droplet; emission control; human activity; hydroxyl radical; radiative forcing; virus; United Kingdom
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169582
作者单位	Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, Cambridge, United Kingdom; National Centre for Atmospheric Science, Department of Chemistry, University of Cambridge, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	Weber J.,Shin Y.M.,Staunton Sykes J.,et al. Minimal Climate Impacts From Short-Lived Climate Forcers Following Emission Reductions Related to the COVID-19 Pandemic[J],2020,47(20).
APA	Weber J.,Shin Y.M.,Staunton Sykes J.,Archer-Nicholls S.,Abraham N.L.,&Archibald A.T..(2020).Minimal Climate Impacts From Short-Lived Climate Forcers Following Emission Reductions Related to the COVID-19 Pandemic.Geophysical Research Letters,47(20).
MLA	Weber J.,et al."Minimal Climate Impacts From Short-Lived Climate Forcers Following Emission Reductions Related to the COVID-19 Pandemic".Geophysical Research Letters 47.20(2020).