气候变化领域集成服务门户(CCPortal): Impact of regional Northern Hemisphere mid-latitude anthropogenic sulfur dioxide emissions on local and remote tropospheric oxidants

CCPortal

DOI	10.5194/acp-21-6799-2021
	Impact of regional Northern Hemisphere mid-latitude anthropogenic sulfur dioxide emissions on local and remote tropospheric oxidants
	Westervelt D.M.; Fiore A.M.; Baublitz C.B.; Correa G.
发表日期	2021
ISSN	1680-7316
起始页码	6799
结束页码	6810
卷号	21 期号:9
英文摘要	The unintended consequences of reductions in regional anthropogenic sulfur dioxide (SO2) emissions implemented to protect human health are poorly understood. SO2 decreases began in the 1970s in the US and Europe and are expected to continue into the future, while recent emissions decreases in China are also projected to continue. In addition to the well-documented climate effects (warming) from reducing aerosols, tropospheric oxidation is impacted via aerosol modification of photolysis rates and radical sinks. Impacts on the hydroxyl radical and other trace constituents directly affect climate and air quality metrics such as surface ozone levels. We use the Geophysical Fluid Dynamics Laboratory Atmospheric Model version 3 nudged towards National Centers for Environmental Prediction (NCEP) reanalysis wind velocities to estimate the impact of SO2 emissions from the US, Europe, and China by differencing a control simulation with an otherwise identical simulation in which 2015 anthropogenic SO2 emissions are set to zero over one of the regions. Springtime sulfate aerosol changes occur both locally to the emission region and also throughout the Northern Hemispheric troposphere, including remote oceanic regions and the Arctic. Hydroperoxy (HO2) radicals are directly removed via heterogeneous chemistry on aerosol surfaces, including sulfate, in the model, and we find that sulfate aerosol produced by SO2 emissions from the three individual northern mid-latitude regions strongly reduces both HO2 and hydroxyl (OH) by up to 10% year-round throughout most of the troposphere north of 30 © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	aerosol composition; aerosol formation; air quality; anthropogenic source; Northern Hemisphere; sulfur dioxide; troposphere; Europe; United States
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/246920
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Department of Earth and Environmental Sciences, Columbia University, Palisades, NY, United States
推荐引用方式 GB/T 7714	Westervelt D.M.,Fiore A.M.,Baublitz C.B.,et al. Impact of regional Northern Hemisphere mid-latitude anthropogenic sulfur dioxide emissions on local and remote tropospheric oxidants[J],2021,21(9).
APA	Westervelt D.M.,Fiore A.M.,Baublitz C.B.,&Correa G..(2021).Impact of regional Northern Hemisphere mid-latitude anthropogenic sulfur dioxide emissions on local and remote tropospheric oxidants.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Westervelt D.M.,et al."Impact of regional Northern Hemisphere mid-latitude anthropogenic sulfur dioxide emissions on local and remote tropospheric oxidants".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).