DOI: 10.1016/j.earscirev.2019.102876
论文题名: A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective
作者: Carrivick J.L. ; Tweed F.S.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 196 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165777
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Carrivick J.L.,Tweed F.S.. A review of glacier outburst floods in Iceland and Greenland with a megafloods perspective[J]. Earth Science Reviews,2019-01-01,196