globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1919723117
论文题名:
Radiative absorption enhancements by black carbon controlled by particle-to-particle heterogeneity in composition
作者: 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.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:10
起始页码: 5196
结束页码: 5203
语种: 英语
英文关键词: Absorption enhancement ; Aerosol mixing state ; Black carbon ; Direct radiative forcing
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
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164289
Appears in Collections:气候变化与战略

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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 Georgia, Athens, GA 30602, United States, Department of Chemistry and Physics, Western Carolina University, Cullowhee, NC 28723, United States; Helgestad, T., Department of Civil and Environmental Engineering, University of California, Davis, CA 95616, United States, Air Quality Planning and Science Division, California Air Resources Board, Sacramento, CA 95814, United States; Lambe, A.T., Center for Aerosol and Cloud Chemistry, Aerodyne Research, Inc., Billerica, MA 02467, United States; Sedlacek, A.J., III, Department of Environmental and Climate Sciences, Brookhaven National Laboratory, Upton, NY 11961, United States; Smith, G.D., Department of Chemistry, University of Georgia, Athens, GA 30602, United States; Wolff, L., Department of Chemistry, Boston College, Chestnut Hill, MA 01821, United States

Recommended Citation:
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]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(10)
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