气候变化领域集成服务门户(CCPortal): Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core

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DOI	10.5194/acp-21-5615-2021
	Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core
	Barker J.D.; Kaspari S.; Gabrielli P.; Wegner A.; Beaudon E.; Roxana Sierra-Hernández M.; Thompson L.
发表日期	2021
ISSN	1680-7316
起始页码	5615
结束页码	5633
卷号	21 期号:7
英文摘要	Himalayan glaciers are melting due to atmospheric warming, with the potential to limit access to water for more than 25% of the global population that resides in these glacier meltwater catchments. Black carbon has been implicated as a factor that is contributing to Himalayan glacier melt, but its sources and mechanisms of delivery to the Himalayas remain controversial. Here, we provide a 211- year ice core record spanning 1781-1992 CE for refractory black carbon (rBC) deposition from the Dasuopu glacier ice core that has to date provided the highest-elevation ice core record (7200 m). We report an average rBC concentration of 1.5 μgL-1(SD = 5.0, n = 1628) over the 211-year period. An increase in the frequency and magnitude of rBC deposition occurs after 1877 CE, accompanied by decreased snow accumulation associated with a shift in the North Atlantic Oscillation Index to a positive phase. Typically, rBC is deposited onto Dasuopu glacier during the non-monsoon season, and short-lived increases in rBC concentration are associated with periods of drought within neighboring regions in northwestern India, Afghanistan, and Pakistan. Using a combination of spectral and back-trajectory analyses, as well as a comparison with a concurrent analysis of trace metals at equivalent depths in the same ice core, we show that biomass burning resulting from dry conditions is a source of rBC to the central Himalaya and is responsible for deposition that is up to 60 times higher than the average rBC concentration over the time period analyzed.We suggest that biomass burning is a significant source of rBC to the central Himalaya and that the rBC record can be used to identify periods of drought in nearby regions that are upwind of Dasuopu glacier. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	biomass burning; black carbon; drought; glacier; ice core; meltwater; reconstruction; China; Dasuopu Glacier; Himalayas; Xizang
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/246979
作者单位	Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH 43210, United States; School of Earth Sciences, The Ohio State University, Columbus, OH 43210, United States; Department of Geological Sciences, Central Washington University, Ellensburg, WA 98926, United States
推荐引用方式 GB/T 7714	Barker J.D.,Kaspari S.,Gabrielli P.,et al. Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core[J],2021,21(7).
APA	Barker J.D..,Kaspari S..,Gabrielli P..,Wegner A..,Beaudon E..,...&Thompson L..(2021).Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(7).
MLA	Barker J.D.,et al."Drought-induced biomass burning as a source of black carbon to the central Himalaya since 1781 CE as reconstructed from the Dasuopu ice core".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.7(2021).