气候变化领域集成服务门户(CCPortal): Twentieth Century Black Carbon and Dust Deposition on South Cascade Glacier, Washington State, USA, as Reconstructed From a 158-m-Long Ice Core

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DOI	10.1029/2019JD031126
	Twentieth Century Black Carbon and Dust Deposition on South Cascade Glacier, Washington State, USA, as Reconstructed From a 158-m-Long Ice Core
	Kaspari S.D.; Pittenger D.; Jenk T.M.; Morgenstern U.; Schwikowski M.; Buenning N.; Stott L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:11
英文摘要	Light absorbing particles (LAPs) include black carbon (BC) and mineral dust and are of interest due to their positive radiative forcing and contribution to albedo reductions and snow and glacier melt. This study documents historic BC and dust deposition as well as their effect on albedo on South Cascade Glacier (SCG) in Washington State (USA) through the analysis of a 158-m (139.5-m water equivalent [w.e.]) ice core extracted in 1994 and spanning the period 1840–1991. Peak BC deposition occurred between 1940 and 1960, when median BC concentrations were 16 times higher than background, likely dominated by domestic coal and forest fire emissions. Post 1960 BC concentrations decrease, followed by an increase from 1977 to 1991 due to melt consolidation and higher emissions. Differences between the SCG record and BC emission inventories, as well as ice core records from other regions, highlight regional differences in the timing of anthropogenic and biomass BC emissions. Dust deposition on SCG is dominated by local sources and is variable throughout the record. Albedo reductions from LAP are dominated by dust deposition, except during high BC deposition events from forest fires and during 1940–1960 when BC and dust similarly contribute to albedo reductions. This study furthers understanding of the factors contributing to historical snowmelt and glacier retreat in the Cascades and demonstrates that ice cores retrieved from temperate glaciers have the potential to provide valuable records of LAP deposition. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	black carbon; cascades; dust; ice core; light absorbing particles; melt
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185988
作者单位	Department of Geological Sciences, Central Washington University, Ellensburg, WA, United States; Laboratory of Environmental Chemistry, Paul Scherrer Institut, Villigen, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland; Institute of Geological and Nuclear Sciences, National Isotope Centre, Lower Hutt, New Zealand; Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland; Department of Earth Sciences, University of Southern California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Kaspari S.D.,Pittenger D.,Jenk T.M.,et al. Twentieth Century Black Carbon and Dust Deposition on South Cascade Glacier, Washington State, USA, as Reconstructed From a 158-m-Long Ice Core[J],2020,125(11).
APA	Kaspari S.D..,Pittenger D..,Jenk T.M..,Morgenstern U..,Schwikowski M..,...&Stott L..(2020).Twentieth Century Black Carbon and Dust Deposition on South Cascade Glacier, Washington State, USA, as Reconstructed From a 158-m-Long Ice Core.Journal of Geophysical Research: Atmospheres,125(11).
MLA	Kaspari S.D.,et al."Twentieth Century Black Carbon and Dust Deposition on South Cascade Glacier, Washington State, USA, as Reconstructed From a 158-m-Long Ice Core".Journal of Geophysical Research: Atmospheres 125.11(2020).