气候变化领域集成服务门户(CCPortal): A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective

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DOI	10.1016/j.earscirev.2019.102876
	A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective
	Carrivick J.L.; Tweed F.S.
发表日期	2019
ISSN	00128252
卷号	196
英文摘要	The very largest glacier outburst floods have been termed ‘megafloods’ given their volume and peak discharge. That definition might be revised because those floods have become understood due to their distinctive and pervasive landscape impacts. At least three floods in Iceland can be categorized as megafloods since they produced impressive bedrock canyons and giant fluvially-transported boulders. Glacier lake outburst floods (GLOFs) in Greenland might also have megaflood-type attributes given the enormous lake volumes drained. We therefore here present the first review of glacier outburst floods in Greenland: sites Isvand, Russell Glacier, Kuannersuit Glacier, Lake Tininnilik, two unnamed lakes near Amitsulooq Ice Cap, and Iluliallup Tasersua, Base Camp Lake, Lake Hullett, Qorlortorssup Tasia, Imaersartoq, Tordensø, North Midternæs and an outlet glacier of the A. P. Olsen Ice Cap. Overall, megaflood-type landscape impacts in Iceland tend to be best-preserved and most easily identified inland although there has also been extensive offshore sedimentation. There are very few reported impacts of glacier outburst floods in Greenland. In Greenland ice-dam failure causes frequent flooding compared to the volcanically-triggered floods in Iceland and this combined with the proximity of the Greenland glacier lakes to the coast means that most proglacial channels in Greenland are flood-hardened and most landscape impact is likely to be offshore in estuaries and fjords. Future floods with megaflood-type attributes will occur in Iceland induced by volcanic activity. In Greenland they will be induced by extreme weather and rapid ice melt. Any potential landscape impact of these future floods remains open to question. © 2019 Elsevier B.V.
关键词	GLOF Ice sheet Ice-dammed lake Jökulhlaup Landscape impact
英文关键词	estuary; extreme event; fjord; glacier; ice flow; ice sheet; ice-dammed lake; jokulhlaup; landscape structure; outburst; proglacial environment; Arctic; Greenland; Iceland
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203399
作者单位	School of Geography, University of Leeds, Woodhouse Lane, Leeds, West Yorkshire LS2 9JT, United Kingdom; Geography, Staffordshire University, College Road, Stoke-on-Trent, Staffordshire ST4 2DE, United Kingdom
推荐引用方式 GB/T 7714	Carrivick J.L.,Tweed F.S.. A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective[J],2019,196.
APA	Carrivick J.L.,&Tweed F.S..(2019).A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective.Earth Science Reviews,196.
MLA	Carrivick J.L.,et al."A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective".Earth Science Reviews 196(2019).