globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2932
论文题名:
River piracy and drainage basin reorganization led by climate-driven glacier retreat
作者: Shugar D.H.; Clague J.J.; Best J.L.; Schoof C.; Willis M.J.; Copland L.; Roe G.H.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期:5
起始页码: 370
结束页码: 375
语种: 英语
Scopus关键词: carbon budget ; climate change ; digital elevation model ; drainage basin ; glacier retreat ; headwater ; image analysis ; landscape evolution ; meltwater ; Quaternary ; river discharge ; sediment analysis ; signal-to-noise ratio ; watershed ; Bering Sea ; Canada ; Kaskawulsh Glacier ; Kluane Lake ; Pacific Ocean ; Pacific Ocean ; Slims River ; Yukon Territory
英文摘要: River piracy - the diversion of the headwaters of one stream into another one - can dramatically change the routing of water and sediment, with a profound effect on landscape evolution. Stream piracy has been investigated in glacial environments, but so far it has mainly been studied over Quaternary or longer timescales. Here we document how retreat of Kaskawulsh Glacier - one of Canada's largest glaciers - abruptly and radically altered the regional drainage pattern in spring 2016. We use a combination of hydrological measurements and drone-generated digital elevation models to show that in late May 2016, meltwater from the glacier was re-routed from discharge in a northward direction into the Bering Sea, to southward into the Pacific Ocean. Based on satellite image analysis and a signal-to-noise ratio as a metric of glacier retreat, we conclude that this instance of river piracy was due to post-industrial climate change. Rapid regional drainage reorganizations of this type can have profound downstream impacts on ecosystems, sediment and carbon budgets, and downstream communities that rely on a stable and sustained discharge. We suggest that the planforms of Slims and Kaskawulsh rivers will adjust in response to altered flows, and the future Kaskawulsh watershed will extend into the now-abandoned headwaters of Slims River and eventually capture the Kluane Lake drainage. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105782
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Water, Sediment, Hazards and Earth-surface Dynamics (WaterSHED) Lab, School of Interdisciplinary Arts and Sciences, University of Washington Tacoma, Tacoma, WA, United States; Centre for Natural Hazards Research, Department of Earth Sciences, Simon Fraser University, Burnaby, BC, Canada; Departments of Geology, Geography and GIS, Mechanical Science and Engineering and Ven Te Chow Hydrosystems Laboratory, University of Illinois, Urbana, IL, United States; Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Department of Geography, Environment and Geomatics, University of Ottawa, Ottawa, ON, Canada; Department of Earth and Space Sciences, University of Washington, Seattle, WA, United States

Recommended Citation:
Shugar D.H.,Clague J.J.,Best J.L.,et al. River piracy and drainage basin reorganization led by climate-driven glacier retreat[J]. Nature Geoscience,2017-01-01,10(5)
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