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Subglacial hydrology as a control on emergence, scale, and spacing of ice streams

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dc.contributor.author Kyrke-Smith, T.M.
dc.contributor.author Katz, R.F
dc.contributor.author Fowler, Andrew C.
dc.date.accessioned 2016-04-26T14:52:18Z
dc.date.available 2016-04-26T14:52:18Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/10344/5037
dc.description peer-reviewed en_US
dc.description.abstract Observations have long associated ice streams with the presence of meltwater at the bed. More recently, theoretical models have been able to reproduce ice stream behavior as a consequence of the coupled dynamics of ice and subglacial meltwater. In this paper we analyze the properties of ice streams that form in a coupled model of ice flow and subglacial hydrology. We see that there is a natural length scale defining ice stream separation and width. This arises as a result of the balance between effective pressure gradients driving meltwater away from ice streams and the enhanced water production in the streams due to the fast ice flow. We further discuss how the model interacts with topography, and we show that small perturbations to a uniform bed have a strong effect on where ice streams emerge in the model. However, in many cases ice streams then evolve to be closer to the dimensions defined by the natural length scale of the unperturbed system. The nondimensional parameter that defines this length scale is therefore of fundamental importance in the model. en_US
dc.language.iso eng en_US
dc.publisher American Geophysical Union en_US
dc.relation.ispartofseries Journal of Geophyical Research: Earth Surface;120, pp. 1501-1504
dc.relation.uri http://dx.doi.org/10.1002/2015JF003505
dc.rights ©2015. American Geophysical Union. All Rights Reserved. en_US
dc.subject West Antractica en_US
dc.subject East Antarctica en_US
dc.subject layer beneath en_US
dc.subject water piracy en_US
dc.subject sheet en_US
dc.subject flow en_US
dc.subject glacier en_US
dc.subject system en_US
dc.subject onset en_US
dc.title Subglacial hydrology as a control on emergence, scale, and spacing of ice streams en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2016-04-26T14:33:46Z
dc.description.version PUBLISHED
dc.contributor.sponsor SFI en_US
dc.contributor.sponsor Natural Environment Research Council en_US
dc.relation.projectid 12/1A/1683 en_US
dc.relation.projectid NE/I528485/1 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1617270
dc.internal.copyrightchecked Yes
dc.description.status peer-reviewed


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