气候变化领域集成服务门户(CCPortal): Source attribution of Arctic black carbon and sulfate aerosols and associated Arctic surface warming during 1980-2018

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DOI	10.5194/acp-20-9067-2020
	Source attribution of Arctic black carbon and sulfate aerosols and associated Arctic surface warming during 1980-2018
	Ren L.; Yang Y.; Wang H.; Zhang R.; Wang P.; Liao H.
发表日期	2020
ISSN	1680-7316
起始页码	9067
结束页码	9085
卷号	20 期号:14
英文摘要	Observations show that the concentrations of Arctic sulfate and black carbon (BC) aerosols have declined since the early 1980s. Previous studies have reported that reducing sulfate aerosols potentially contributed to the recent rapid Arctic warming. In this study, a global aerosol-climate model (Community Atmosphere Model, version 5) equipped with Explicit Aerosol Source Tagging (CAM5-EAST) is applied to quantify the source apportionment of aerosols in the Arctic from 16 source regions and the role of aerosol variations in affecting changes in the Arctic surface temperature from 1980 to 2018. The CAM5-EAST simulated surface concentrations of sulfate and BC in the Arctic had a decrease of 43thinsp; and 23thinsp;, respectively, in 2014-2018 relative to 1980-1984 mainly due to the reduction of emissions from Europe, Russia and local Arctic sources. Increases in emissions from South and East Asia led to positive trends in Arctic sulfate and BC in the upper troposphere. All aerosol radiative impacts are considered including aerosol-radiation and aerosol-cloud interactions, as well as black carbon deposition on snow- and ice-covered surfaces. Within the Arctic, sulfate reductions caused a top-of-atmosphere (TOA) warming of 0.11 and 0.25thinsp;Wthinsp span classCombining double low line inline-formula -2 /span through aerosol-radiation and aerosol-cloud interactions, respectively. While the changes in Arctic atmospheric BC has little impact on local radiative forcing, the decrease in BC in snow and ice led to a net cooling of 0.05thinsp;Wthinspspan classCombining double low line inline-formula -2 /span. By applying climate sensitivity factors for different latitudinal bands, global changes in sulfate and BC during 2014-2018 (with respect to 1980-1984) exerted a span classCombining double low line inline-formula +0.088 /span and 0.057thinsp;K Arctic surface warming, respectively, through aerosol-radiation interactions. Through aerosol-cloud interactions, the sulfate reduction caused an Arctic warming of span classCombining double low line inline-formula +0.193 /spanthinsp;K between the two time periods. The weakened BC effect on snow-ice albedo led to an Arctic surface cooling of span classCombining double low line inline-formula -0.041 /spanthinsp;K. The changes in atmospheric sulfate and BC outside the Arctic produced a total Arctic warming of span classCombining double low line inline-formula + /span0.25thinsp;K, the majority of which is due to the midlatitude changes in radiative forcing. Our results suggest that changes in aerosols over the midlatitudes of the Northern Hemisphere have a larger impact on Arctic temperature than other regions through enhanced poleward heat transport. The combined total effects of sulfate and BC produced an Arctic surface warming of span classCombining double low line inline-formula + /span0.297thinsp;K, explaining approximately 20thinsp; of the observed Arctic warming since the early 1980s. /p. © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	aerosol; albedo; black carbon; climate change; climate modeling; concentration (composition); radiative forcing; source apportionment; sulfate; trend analysis; warming; Arctic
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/247612
作者单位	Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation, Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, United States
推荐引用方式 GB/T 7714	Ren L.,Yang Y.,Wang H.,et al. Source attribution of Arctic black carbon and sulfate aerosols and associated Arctic surface warming during 1980-2018[J],2020,20(14).
APA	Ren L.,Yang Y.,Wang H.,Zhang R.,Wang P.,&Liao H..(2020).Source attribution of Arctic black carbon and sulfate aerosols and associated Arctic surface warming during 1980-2018.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(14).
MLA	Ren L.,et al."Source attribution of Arctic black carbon and sulfate aerosols and associated Arctic surface warming during 1980-2018".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.14(2020).