Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland
Ice thickness measurements near the margin of the Greenland Ice Sheet (GrIS) are relatively sparse, presenting issues for modeling ice-flow dynamics, ice-sheet change, and subglacial hydrology. We acquired near-margin ice thickness data at Leverett Glacier, west Greenland, using a highly portable, l...
Published in: | Arctic, Antarctic, and Alpine Research |
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2018
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ftdoajarticles:oai:doaj.org/article:9e3046bef8614afbbb95a94aa2461612 2023-05-15T14:14:29+02:00 Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland Neil Ross Andrew J. Sole Stephen J. Livingstone Ádam Igneczi Mathieu Morlighem 2018-01-01T00:00:00Z https://doi.org/10.1080/15230430.2017.1420949 https://doaj.org/article/9e3046bef8614afbbb95a94aa2461612 EN eng Taylor & Francis Group http://dx.doi.org/10.1080/15230430.2017.1420949 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2017.1420949 https://doaj.org/article/9e3046bef8614afbbb95a94aa2461612 Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) greenland ground penetrating radar ice thickness subglacial hydrology leverett glacier Environmental sciences GE1-350 Ecology QH540-549.5 article 2018 ftdoajarticles https://doi.org/10.1080/15230430.2017.1420949 2022-12-31T04:10:54Z Ice thickness measurements near the margin of the Greenland Ice Sheet (GrIS) are relatively sparse, presenting issues for modeling ice-flow dynamics, ice-sheet change, and subglacial hydrology. We acquired near-margin ice thickness data at Leverett Glacier, west Greenland, using a highly portable, low power, ground-penetrating radar operating at 10–80 MHz. Ice-thickness measurements, to a maximum of 270 m, were incorporated into the BedMachine model of ice thickness, created using mass conservation methods. The new data significantly modified the modeled ice thickness, and hence bed elevation and routing of subglacial water, in both the Leverett and adjacent Russell Glacier. Although the revised modeled basal topography and subglacial hydrology are consistent with observations, our new data unrealistically reduced the overall size of the Leverett Glacier hydrological catchment. Additional ice-thickness measurements are therefore required to realistically constrain subglacial topography and subglacial hydrological routing in this area. Our work improves understanding of the basal topography and the subglacial hydrology of Leverett Glacier, with implications for glacier dynamics and assessments of water piracy between catchments in the marginal zone of the GrIS, and for the interpolation of ice-thickness grids using mass conservation methods. Article in Journal/Newspaper Antarctic and Alpine Research Arctic glacier Greenland Ice Sheet Leverett Glacier Directory of Open Access Journals: DOAJ Articles Greenland Leverett Glacier ENVELOPE(-147.583,-147.583,-85.633,-85.633) Arctic, Antarctic, and Alpine Research 50 1 S100007 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
greenland ground penetrating radar ice thickness subglacial hydrology leverett glacier Environmental sciences GE1-350 Ecology QH540-549.5 |
spellingShingle |
greenland ground penetrating radar ice thickness subglacial hydrology leverett glacier Environmental sciences GE1-350 Ecology QH540-549.5 Neil Ross Andrew J. Sole Stephen J. Livingstone Ádam Igneczi Mathieu Morlighem Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
topic_facet |
greenland ground penetrating radar ice thickness subglacial hydrology leverett glacier Environmental sciences GE1-350 Ecology QH540-549.5 |
description |
Ice thickness measurements near the margin of the Greenland Ice Sheet (GrIS) are relatively sparse, presenting issues for modeling ice-flow dynamics, ice-sheet change, and subglacial hydrology. We acquired near-margin ice thickness data at Leverett Glacier, west Greenland, using a highly portable, low power, ground-penetrating radar operating at 10–80 MHz. Ice-thickness measurements, to a maximum of 270 m, were incorporated into the BedMachine model of ice thickness, created using mass conservation methods. The new data significantly modified the modeled ice thickness, and hence bed elevation and routing of subglacial water, in both the Leverett and adjacent Russell Glacier. Although the revised modeled basal topography and subglacial hydrology are consistent with observations, our new data unrealistically reduced the overall size of the Leverett Glacier hydrological catchment. Additional ice-thickness measurements are therefore required to realistically constrain subglacial topography and subglacial hydrological routing in this area. Our work improves understanding of the basal topography and the subglacial hydrology of Leverett Glacier, with implications for glacier dynamics and assessments of water piracy between catchments in the marginal zone of the GrIS, and for the interpolation of ice-thickness grids using mass conservation methods. |
format |
Article in Journal/Newspaper |
author |
Neil Ross Andrew J. Sole Stephen J. Livingstone Ádam Igneczi Mathieu Morlighem |
author_facet |
Neil Ross Andrew J. Sole Stephen J. Livingstone Ádam Igneczi Mathieu Morlighem |
author_sort |
Neil Ross |
title |
Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
title_short |
Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
title_full |
Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
title_fullStr |
Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
title_full_unstemmed |
Near-margin ice thickness and subglacial water routing, Leverett Glacier, Greenland |
title_sort |
near-margin ice thickness and subglacial water routing, leverett glacier, greenland |
publisher |
Taylor & Francis Group |
publishDate |
2018 |
url |
https://doi.org/10.1080/15230430.2017.1420949 https://doaj.org/article/9e3046bef8614afbbb95a94aa2461612 |
long_lat |
ENVELOPE(-147.583,-147.583,-85.633,-85.633) |
geographic |
Greenland Leverett Glacier |
geographic_facet |
Greenland Leverett Glacier |
genre |
Antarctic and Alpine Research Arctic glacier Greenland Ice Sheet Leverett Glacier |
genre_facet |
Antarctic and Alpine Research Arctic glacier Greenland Ice Sheet Leverett Glacier |
op_source |
Arctic, Antarctic, and Alpine Research, Vol 50, Iss 1 (2018) |
op_relation |
http://dx.doi.org/10.1080/15230430.2017.1420949 https://doaj.org/toc/1523-0430 https://doaj.org/toc/1938-4246 1523-0430 1938-4246 doi:10.1080/15230430.2017.1420949 https://doaj.org/article/9e3046bef8614afbbb95a94aa2461612 |
op_doi |
https://doi.org/10.1080/15230430.2017.1420949 |
container_title |
Arctic, Antarctic, and Alpine Research |
container_volume |
50 |
container_issue |
1 |
container_start_page |
S100007 |
_version_ |
1766286925626343424 |