气候变化领域集成服务门户(CCPortal): Thermal conductivity of supraglacial volcanic deposits in Iceland

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DOI	10.1007/s00531-020-01820-0
	Thermal conductivity of supraglacial volcanic deposits in Iceland
	Möller R.; Römer W.; Möller M.; Wollenberg U.; Lehmkuhl F.; Schneider C.; Kukla P.A.
发表日期	2020
ISSN	14373254
起始页码	569
结束页码	585
卷号	109 期号:2
英文摘要	Supraglacial deposits of tephra or volcaniclastics have the potential to cause significant anomalies of glacier ablation and runoff. The intensity of these anomalies is governed by the thermal resistivity of the covering layer and hence the thermal conductivity of the deposited grains. This study concentrates on causal and quantitative relationships between density, geochemical composition and thermal conductivity of volcanic materials based on the analysis of 43 samples from locations across Iceland. Thermal conductivity is primarily influenced by density, whereas geochemical composition has been proved to be of subsidiary importance. Four different multiple regression models were calibrated that calculate the grain thermal conductivity of a volcanic material based on rock properties and geochemical composition. In a subsequent step, the bulk thermal conductivity of the respective deposit is calculated as a function of porosity and degree of water saturation. Examples using volcanic material from the Eyjafjallajökull 2010 and Grímsvötn 2011 eruptions confirm that the presented calculation scheme can be executed using only limited geochemical data as input. This facilitates an easy application of the modeling scheme immediately after a volcanic eruption. © 2020, The Author(s).
英文关键词	Iceland; Major element oxides; Modeling; Thermal conductivity; Volcanic tephra
语种	英语
scopus关键词	geochemical method; glacial environment; glacier flow; numerical model; regression analysis; tephra; thermal conductivity; volcanic eruption; volcaniclastic deposit; Iceland
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147707
作者单位	Department of Geography, RWTH Aachen University, Aachen, Germany; Geological Institute, Energy and Minerals Resources Group, RWTH Aachen University, Aachen, Germany; Institute of Geography, University of Bremen, Bremen, Germany; Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany
推荐引用方式 GB/T 7714	Möller R.,Römer W.,Möller M.,et al. Thermal conductivity of supraglacial volcanic deposits in Iceland[J],2020,109(2).
APA	Möller R..,Römer W..,Möller M..,Wollenberg U..,Lehmkuhl F..,...&Kukla P.A..(2020).Thermal conductivity of supraglacial volcanic deposits in Iceland.International Journal of Earth Sciences,109(2).
MLA	Möller R.,et al."Thermal conductivity of supraglacial volcanic deposits in Iceland".International Journal of Earth Sciences 109.2(2020).