Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016
Ice in the ablation zone of the Greenland ice sheet is known to contain vertical temperature gradients that arise from conduction at the boundaries, the addition of strain and latent heat, and advective heat transport. A three‐dimensional array of temperature measurements in a grid of boreholes reve...
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Arctic Data Center
2017
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dataone:doi:10.18739/A24746S04 2024-06-03T18:46:51+00:00 Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 Joel Harper Western Greenland Ice Sheet; 33 km inland from terminus of Issunguata Sermia ENVELOPE(-49.5817,-49.5692,67.1817,67.1817) BEGINDATE: 2014-07-01T00:00:00Z ENDDATE: 2016-08-01T00:00:00Z 2017-11-10T00:00:00Z https://doi.org/10.18739/A24746S04 unknown Arctic Data Center Dataset 2017 dataone:urn:node:ARCTIC https://doi.org/10.18739/A24746S04 2024-06-03T18:16:24Z Ice in the ablation zone of the Greenland ice sheet is known to contain vertical temperature gradients that arise from conduction at the boundaries, the addition of strain and latent heat, and advective heat transport. A three‐dimensional array of temperature measurements in a grid of boreholes reveals horizontal ice temperature gradients that challenge the present conceptualization of heat transfer. We measure two distinct types of temperature variability in the horizontal direction, one impacting a confined region where ice temperatures span a range of 5°C, and another with temperatures consistently varying by approximately 2°C across the entire 3‐D block. We suggest the first demonstrates the localized and limited nature of latent heat input, and the second demonstrates that vertical heat advection outpaces diffusion. These findings imply that ice flow is highly variable over sub‐ice‐thickness length scales, which in turn generates contrasts in ice temperature that may impact ice deformation and fracturing. Dataset Greenland Ice Sheet Arctic Data Center (via DataONE) Greenland ENVELOPE(-49.5817,-49.5692,67.1817,67.1817) |
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Open Polar |
collection |
Arctic Data Center (via DataONE) |
op_collection_id |
dataone:urn:node:ARCTIC |
language |
unknown |
description |
Ice in the ablation zone of the Greenland ice sheet is known to contain vertical temperature gradients that arise from conduction at the boundaries, the addition of strain and latent heat, and advective heat transport. A three‐dimensional array of temperature measurements in a grid of boreholes reveals horizontal ice temperature gradients that challenge the present conceptualization of heat transfer. We measure two distinct types of temperature variability in the horizontal direction, one impacting a confined region where ice temperatures span a range of 5°C, and another with temperatures consistently varying by approximately 2°C across the entire 3‐D block. We suggest the first demonstrates the localized and limited nature of latent heat input, and the second demonstrates that vertical heat advection outpaces diffusion. These findings imply that ice flow is highly variable over sub‐ice‐thickness length scales, which in turn generates contrasts in ice temperature that may impact ice deformation and fracturing. |
format |
Dataset |
author |
Joel Harper |
spellingShingle |
Joel Harper Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
author_facet |
Joel Harper |
author_sort |
Joel Harper |
title |
Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
title_short |
Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
title_full |
Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
title_fullStr |
Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
title_full_unstemmed |
Ice temperatures measured in a grid of boreholes, Western Greenland, 2014-2016 |
title_sort |
ice temperatures measured in a grid of boreholes, western greenland, 2014-2016 |
publisher |
Arctic Data Center |
publishDate |
2017 |
url |
https://doi.org/10.18739/A24746S04 |
op_coverage |
Western Greenland Ice Sheet; 33 km inland from terminus of Issunguata Sermia ENVELOPE(-49.5817,-49.5692,67.1817,67.1817) BEGINDATE: 2014-07-01T00:00:00Z ENDDATE: 2016-08-01T00:00:00Z |
long_lat |
ENVELOPE(-49.5817,-49.5692,67.1817,67.1817) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_doi |
https://doi.org/10.18739/A24746S04 |
_version_ |
1800872221754785792 |