Testing a numerical glacial hydrological model using spring speed-up events and outburst floods

We describe a numerical model of a glacial‐hydrologic system that reproduces the salient features of two hydrological and ice motion events commonly observed on temperate alpine glaciers. These include the pattern of ice sliding and water discharge characteristic of spring speed‐up events, and the t...

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Vydáno v:Geophysical research letters Ročník 31; číslo 18; s. L18503.1 - n/a
Hlavní autoři: Kessler, Mark A., Anderson, Robert S.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Washington, DC Blackwell Publishing Ltd 01.09.2004
American Geophysical Union
Témata:
Earth, ocean, space
Exact sciences and technology
glaciers
floods
springs
testing
ice
digital simulation
Slow flow
networks
water storage
Feedback
numerical models
Spring(season)
discharge
deformation
lakes
Triggering
ISSN:0094-8276, 1944-8007
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Shrnutí:We describe a numerical model of a glacial‐hydrologic system that reproduces the salient features of two hydrological and ice motion events commonly observed on temperate alpine glaciers. These include the pattern of ice sliding and water discharge characteristic of spring speed‐up events, and the triggering and structure of outburst floods from ice‐marginal lakes. These behaviors result from strong internal feedbacks between water storage in englacial macro‐pores or an ice‐marginal lake, ice motion by sliding and deformation, and a subglacial hydrologic system consisting of a slow‐flow linked cavity network and a fast‐flow centerline conduit.
Bibliografie:ArticleID:2004GL020622
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SourceType-Scholarly Journals-1
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ISSN:0094-8276
1944-8007
DOI:10.1029/2004GL020622