Ross, N., Sole, A.J. orcid.org/0000-0001-5290-8967, Livingstone, S.J. et al. (2 more authors) (2018) Near-margin ice thickness from a portable radar: implications for subglacial water routing, Leverett Glacier, Greenland. Arctic, Antarctic and Alpine Research, 50 (1). S100007 . ISSN 1523-0430
Abstract
Ice thickness measurements near the margin of the Greenland Ice Sheet (GrIS) are relatively sparse, presenting issues for modelling ice flow dynamics, ice sheet change and subglacial hydrology. We acquired ice thickness data at Leverett Glacier, western Greenland, using a highly portable, low power commercially-available ice-penetrating radar operating at 10-80 MHz. Imaging of the bed to depths of 270 m was possible using this system. Our ice thickness measurements were incorporated into the BedMachine model of bed elevation created using mass conservation methods. The new data significantly modified the modelled ice thickness and routing of subglacial water in both the Leverett and adjacent Russell Glacier. Though changes to the modelled basal topography and subglacial hydrology are consistent with observations, our new data unrealistically reduced the overall size of the Leverett hydrological catchment. Additional ice thickness measurements are therefore required to realistically constrain subglacial topography and subglacial hydrological routing in this area. Our work has significantly enhanced our understanding of basal topography and subglacial hydrology of Leverett Glacier, with implications for glacier dynamics and assessments of water piracy between catchments in the marginal zone of the GrIS.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). Published by Taylor & Francis. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > Department of Geography (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 26 Sep 2017 14:46 |
Last Modified: | 09 May 2018 14:08 |
Published Version: | https://doi.org/10.1080/15230430.2017.1420949 |
Status: | Published |
Publisher: | Taylor & Francis Open |
Refereed: | Yes |
Identification Number: | 10.1080/15230430.2017.1420949 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121555 |
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