气候变化领域集成服务门户(CCPortal): Infrared-absorbing carbonaceous tar can dominate light absorption by marine-engine exhaust

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DOI	10.1038/s41612-019-0069-5
	Infrared-absorbing carbonaceous tar can dominate light absorption by marine-engine exhaust
	Corbin J.C.; Czech H.; Massabò D.; de Mongeot F.B.; Jakobi G.; Liu F.; Lobo P.; Mennucci C.; Mensah A.A.; Orasche J.; Pieber S.M.; Prévôt A.S.H.; Stengel B.; Tay L.-L.; Zanatta M.; Zimmermann R.; El Haddad I.; Gysel M.
发表日期	2019
ISSN	23973722
卷号	2 期号:1
英文摘要	Ship engines in the open ocean and Arctic typically combust heavy fuel oil (HFO), resulting in light-absorbing particulate matter (PM) emissions that have been attributed to black carbon (BC) and conventional, soluble brown carbon (brC). We show here that neither BC nor soluble brC is the major light-absorbing carbon (LAC) species in HFO-combustion PM. Instead, “tar brC” dominates. This tar brC, previously identified only in open-biomass-burning emissions, shares key defining properties with BC: it is insoluble, refractory, and substantially absorbs visible and near-infrared light. Relative to BC, tar brC has a higher Angstrom absorption exponent (AAE) (2.5–6, depending on the considered wavelengths), a moderately-high mass absorption efficiency (up to 50% of that of BC), and a lower ratio of sp2- to sp3-bonded carbon. Based on our results, we present a refined classification of atmospheric LAC into two sub-types of BC and two sub-types of brC. We apply this refined classification to demonstrate that common analytical techniques for BC must be interpreted with care when applied to tar-containing aerosols. The global significance of our results is indicated by field observations which suggest that tar brC already contributes to Arctic snow darkening, an effect which may be magnified over upcoming decades as Arctic shipping continues to intensify. © 2019, Crown.
语种	英语
scopus关键词	absorption efficiency; air quality; atmospheric pollution; biomass burning; black carbon; brown carbon; carbon emission; combustion; diesel engine; open ocean; particulate matter; ship handling; shipping; Arctic Ocean
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178106
作者单位	Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen, CH-5232, Switzerland; Metrology Research Centre, National Research Council Canada, Ottawa, Canada; Joint Mass Spectrometry Centre, Chair of Analytical Chemistry, Institute of Chemistry, University of Rostock, Rostock, Germany; Department of Physics, University of Genoa, Genoa, Italy; INFN, Sezione di Genova, Via Dodecaneso 22, Genoa, 17157, Italy; HICE—Helmholtz Virtual Institute for Complex Molecular Systems in Environmental Health, Rostock, Germany; Joint Mass Spectrometry Centre, Cooperation Group Comprehensive Molecular Analytics (CMA), Helmholtz-Zentrum München, Ingoldstädter Landstrasse, Neuherberg, 85764, Germany; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, 8092, Switzerland; Department of Piston Machines and Internal Combustion Engines, Albert-Einstein-Str. 2, Rostock, 18059, Germany; University of Eastern Finland, Kuopio, Finland; Laboratory for Air Pollution and Environmental Technology (Empa), Duebend...
推荐引用方式 GB/T 7714	Corbin J.C.,Czech H.,Massabò D.,et al. Infrared-absorbing carbonaceous tar can dominate light absorption by marine-engine exhaust[J],2019,2(1).
APA	Corbin J.C..,Czech H..,Massabò D..,de Mongeot F.B..,Jakobi G..,...&Gysel M..(2019).Infrared-absorbing carbonaceous tar can dominate light absorption by marine-engine exhaust.npj Climate and Atmospheric Science,2(1).
MLA	Corbin J.C.,et al."Infrared-absorbing carbonaceous tar can dominate light absorption by marine-engine exhaust".npj Climate and Atmospheric Science 2.1(2019).