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DOI	10.1029/2020GL089876
	Après Nous; le Déluge: A Human-Triggered Jökulhlaup From a Subglacial Lake
	Gaidos E.; Jóhannesson T.; Einarsson B.; Thorsteinsson T.; Amend J.P.; Skidmore M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	Glacial floods (jökulhlaups) are a phenomenon of some temperate ice masses; they are a significant natural hazard, but their complex hydrology is incompletely understood. We document a jökulhlaup from a subglacial lake in Iceland that was inadvertently triggered by a borehole drilled through the overlying ice. We propose that this borehole allowed an englacial water body to drain into the lake, inducing a transient rise in pressure that overwhelmed the lake's subglacial seal 5 days later. Runaway melting of a subglacial conduit by 4°C lake water then initiated a flood to the outlet glacier margin. This incident suggests that draining of englacial water bodies via hydrofracturing crevasses and flooding of moulins by precipitation events are potential natural triggers of jökulhlaups and explains a correlation between surface melting and jökulhlaups. This hydraulic trigger could have wider implications for relations between meteorological conditions, drainage, and dynamics of some glaciers. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Boreholes; Floods; Melting; Hydro-fracturing; Lake waters; Meteorological condition; Natural hazard; Precipitation events; Subglacial lakes; Surface melting; Waterbodies; Lakes; borehole breakout; flooding; glacial hydrology; glacial lake; glacier flow; human activity; hydraulic fracturing; ice flow; subglacial deposit; temperature effect; Iceland
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169437
作者单位	Department of Earth Sciences, University of Hawai'i at Mānoa, Honolulu, HI, United States; Veðurstofa Íslands (Iceland Meteorological Office), Reykjavík, Iceland; Departments of Earth and Biological Sciences, University of Southern California, Los Angeles, CA, United States; Department of Earth Sciences, Montana State University, Bozeman, MT, United States
推荐引用方式 GB/T 7714	Gaidos E.,Jóhannesson T.,Einarsson B.,et al. Après Nous; le Déluge: A Human-Triggered Jökulhlaup From a Subglacial Lake[J],2020,47(22).
APA	Gaidos E.,Jóhannesson T.,Einarsson B.,Thorsteinsson T.,Amend J.P.,&Skidmore M..(2020).Après Nous; le Déluge: A Human-Triggered Jökulhlaup From a Subglacial Lake.Geophysical Research Letters,47(22).
MLA	Gaidos E.,et al."Après Nous; le Déluge: A Human-Triggered Jökulhlaup From a Subglacial Lake".Geophysical Research Letters 47.22(2020).