气候变化领域集成服务门户(CCPortal): Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina

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DOI	10.5194/tc-15-1187-2021
	Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina
	Halla C.; Henrik Blöthe J.; Tapia Baldis C.; Trombotto Liaudat D.; Hilbich C.; Hauck C.; Schrott L.
发表日期	2021
ISSN	19940416
起始页码	1187
结束页码	1213
卷号	15 期号:2
英文摘要	The quantification of volumetric ice and water content in active rock glaciers is necessary to estimate their role as water stores and contributors to runoff in dry mountain catchments. In the semi-Arid to arid Andes of Argentina, active rock glaciers potentially constitute important water reservoirs due to their widespread distribution. Here however, water storage capacities and their interannual changes have so far escaped quantification in detailed field studies. Volumetric ice and water content was quantified using a petrophysical four-phase model (4PM) based on complementary electrical resistivity tomography (ERT) and seismic refraction tomography (SRT) in different positions of the Dos Lenguas rock glacier in the upper Agua Negra basin, Argentina. We derived vertical and horizontal surface changes of the Dos Lenguas rock glacier, for the periods 2016 2017 and 2017 2018 using drone-derived digital elevation models (DEMs). Interannual water storage changes of 36mmyr1 and C27mmyr1 derived from volumetric surface changes for the periods 2016 2017 and 2017 2018, respectively, indicate that significant amounts of annual precipitation can be stored in and released from the active rock glacier. Geophysical results show heterogeneous ice and water content with ice-rich permafrost and supra-, intra-and subpermafrost water pathways at the end of the thaw period. Active layer and ice-rich permafrost control traps and pathways of shallow groundwater and thus regulate interannual storage changes and water releases from the active rock glaciers in the dry mountain catchment. The ice content of 1.7 2.0 109 kg in the active Dos Lenguas rock glacier represents an important long-Term ice reservoir, as do other ground ice deposits in the vicinity, if compared to surface ice that covers less than 3% of the high mountain catchment. © 2021 Copernicus GmbH. All rights reserved.
英文关键词	annual variation; electrical resistivity; ice cover; permafrost; rock glacier; seismic refraction; water content; water storage; Andes; Argentina
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202324
作者单位	Department of Geography, University of Bonn, Bonn, 53115, Germany; Institute of Environmental Social Sciences and Geography, University of Freiburg, Freiburg, 79085, Germany; Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, Cct Conicet, Mendoza, 5500, Argentina; Department of Geosciences, University of Fribourg, Fribourg, 1700, Switzerland
推荐引用方式 GB/T 7714	Halla C.,Henrik Blöthe J.,Tapia Baldis C.,et al. Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina[J],2021,15(2).
APA	Halla C..,Henrik Blöthe J..,Tapia Baldis C..,Trombotto Liaudat D..,Hilbich C..,...&Schrott L..(2021).Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina.Cryosphere,15(2).
MLA	Halla C.,et al."Ice content and interannual water storage changes of an active rock glacier in the dry Andes of Argentina".Cryosphere 15.2(2021).