Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017
The gradient of the hydraulic potential field at the ice-bedrock interface beneath the Greenland Ice Sheet dictates the routing and energetics of subglacial water, thereby influencing drainage system characteristics and sliding dynamics. In the ablation zone of the GrIS, variable water pressure due...
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Arctic Data Center
2017
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dataone:doi:10.18739/A2C857 2024-06-03T18:46:52+00:00 Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 Toby Meierbachtol The study site is located in western GrIS ablation zone ~33 km east of the terrestrial terminus of Isunnguata Sermia. Ice thickness at the study site ranges from 641 to 675 m. Radar data indicate that the bed is relatively flat with a slight reverse bed slope, although an east/west trending, 1000 m deep basal trough exists ~1.8 km north of the site. ENVELOPE(-49.6,-49.5639,67.1819,67.1808) BEGINDATE: 2014-07-17T00:00:00Z ENDDATE: 2017-07-20T00:00:00Z 2017-12-22T00:00:00Z https://doi.org/10.18739/A2C857 unknown Arctic Data Center water pressure greenland borehole Dataset 2017 dataone:urn:node:ARCTIC https://doi.org/10.18739/A2C857 2024-06-03T18:10:54Z The gradient of the hydraulic potential field at the ice-bedrock interface beneath the Greenland Ice Sheet dictates the routing and energetics of subglacial water, thereby influencing drainage system characteristics and sliding dynamics. In the ablation zone of the GrIS, variable water pressure due to an active subglacial drainage system and basal topography with high relief potentially interact to drive unknown spatial patterns and temporal changes in the hydraulic potential field. Here we present a suite of water pressure measurements collected in boreholes at a site in western GrIS, collected from 2014 to 2017 as part of an NSF-funded study to investigate the partitioning of surface velocity in to sliding and deformational components, and the role of meltwater on ice dynamics. Borehole sites show consistently high pressures with small scale variability during the melt season. High pressure persists during the winter period in the single borehole for each over-winter records are measured. Dataset Greenland Ice Sheet Arctic Data Center (via DataONE) Greenland Isunnguata Sermia ENVELOPE(-50.167,-50.167,67.183,67.183) ENVELOPE(-49.6,-49.5639,67.1819,67.1808) |
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Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
topic |
water pressure greenland borehole |
spellingShingle |
water pressure greenland borehole Toby Meierbachtol Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
topic_facet |
water pressure greenland borehole |
description |
The gradient of the hydraulic potential field at the ice-bedrock interface beneath the Greenland Ice Sheet dictates the routing and energetics of subglacial water, thereby influencing drainage system characteristics and sliding dynamics. In the ablation zone of the GrIS, variable water pressure due to an active subglacial drainage system and basal topography with high relief potentially interact to drive unknown spatial patterns and temporal changes in the hydraulic potential field. Here we present a suite of water pressure measurements collected in boreholes at a site in western GrIS, collected from 2014 to 2017 as part of an NSF-funded study to investigate the partitioning of surface velocity in to sliding and deformational components, and the role of meltwater on ice dynamics. Borehole sites show consistently high pressures with small scale variability during the melt season. High pressure persists during the winter period in the single borehole for each over-winter records are measured. |
format |
Dataset |
author |
Toby Meierbachtol |
author_facet |
Toby Meierbachtol |
author_sort |
Toby Meierbachtol |
title |
Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
title_short |
Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
title_full |
Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
title_fullStr |
Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
title_full_unstemmed |
Basal water pressure measured in boreholes drilled to the bed of Western Greenland: 2014-2017 |
title_sort |
basal water pressure measured in boreholes drilled to the bed of western greenland: 2014-2017 |
publisher |
Arctic Data Center |
publishDate |
2017 |
url |
https://doi.org/10.18739/A2C857 |
op_coverage |
The study site is located in western GrIS ablation zone ~33 km east of the terrestrial terminus of Isunnguata Sermia. Ice thickness at the study site ranges from 641 to 675 m. Radar data indicate that the bed is relatively flat with a slight reverse bed slope, although an east/west trending, 1000 m deep basal trough exists ~1.8 km north of the site. ENVELOPE(-49.6,-49.5639,67.1819,67.1808) BEGINDATE: 2014-07-17T00:00:00Z ENDDATE: 2017-07-20T00:00:00Z |
long_lat |
ENVELOPE(-50.167,-50.167,67.183,67.183) ENVELOPE(-49.6,-49.5639,67.1819,67.1808) |
geographic |
Greenland Isunnguata Sermia |
geographic_facet |
Greenland Isunnguata Sermia |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_doi |
https://doi.org/10.18739/A2C857 |
_version_ |
1800872254787026944 |