气候变化领域集成服务门户(CCPortal): Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition

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DOI	10.1073/pnas.1919723117
	Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition
	Fierce L.; Onasch T.B.; Cappa C.D.; Mazzoleni C.; China S.; Bhandari J.; Davidovits P.; Al Fischer D.; Helgestad T.; Lambe A.T.; Sedlacek A.J.; III; Smith G.D.; Wolff L.
发表日期	2020
ISSN	0027-8424
起始页码	5196
结束页码	5203
卷号	117 期号:10
英文摘要	Black carbon (BC) absorbs solar radiation, leading to a strong but uncertain warming effect on climate. A key challenge in modeling and quantifying BC’s radiative effect on climate is predicting enhancements in light absorption that result from internal mixing between BC and other aerosol components. Modeling and laboratory studies show that BC, when mixed with other aerosol components, absorbs more strongly than pure, uncoated BC; however, some ambient observations suggest more variable and weaker absorption enhancement. We show that the lower-than-expected enhancements in ambient measurements result from a combination of two factors. First, the often used spherical, concentric core-shell approximation generally overestimates the absorption by BC. Second, and more importantly, inadequate consideration of heterogeneity in particle-to-particle composition engenders substantial overestimation in absorption by the total particle population, with greater heterogeneity associated with larger model–measurement differences. We show that accounting for these two effects—variability in per-particle composition and deviations from the core-shell approximation—reconciles absorption enhancement predictions with laboratory and field observations and resolves the apparent discrepancy. Furthermore, our consistent model framework provides a path forward for improving predictions of BC’s radiative effect on climate. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Absorption enhancement; Aerosol mixing state; Black carbon; Direct radiative forcing
语种	英语
scopus关键词	black carbon; aerosol; Article; chemical composition; climate warming; controlled study; light absorption; particle to particle heterogeneity; physical chemistry; physical parameters; prediction; priority journal; radiation absorption
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161026
作者单位	Fierce, L., Department of Environmental and Climate Sciences, Brookhaven National Laboratory, Upton, NY 11961, United States; Onasch, T.B., Center for Aerosol and Cloud Chemistry, Aerodyne Research, Inc., Billerica, MA 02467, United States, Department of Chemistry, Boston College, Chestnut Hill, MA 01821, United States; Cappa, C.D., Department of Civil and Environmental Engineering, University of California, Davis, CA 95616, United States; Mazzoleni, C., Department of Physics and Atmospheric Sciences Program, Michigan Technological University, Houghton, MI 49931, United States; China, S., Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, United States; Bhandari, J., Department of Physics and Atmospheric Sciences Program, Michigan Technological University, Houghton, MI 49931, United States; Davidovits, P., Department of Chemistry, Boston College, Chestnut Hill, MA 01821, United States; Al Fischer, D., Department of Chemistry, University of Georg...
推荐引用方式 GB/T 7714	Fierce L.,Onasch T.B.,Cappa C.D.,et al. Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition[J],2020,117(10).
APA	Fierce L..,Onasch T.B..,Cappa C.D..,Mazzoleni C..,China S..,...&Wolff L..(2020).Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition.Proceedings of the National Academy of Sciences of the United States of America,117(10).
MLA	Fierce L.,et al."Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition".Proceedings of the National Academy of Sciences of the United States of America 117.10(2020).