Rapid basal channel growth beneath Greenland's longest floating ice shelf
Nioghalvfjerdsfjorden Glacier (N79) is one of the two main outlets for Greenland’s largest ice stream, the Northeast Greenland Ice Stream (NEGIS), and is the more stable of the two, with no calving front retreat expected in the near future. Using a novel elevation reconstruction approach combining d...
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2023
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Online Access: | http://dx.doi.org/10.22541/essoar.167690082.29222366/v1 |
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crwinnower:10.22541/essoar.167690082.29222366/v1 2024-06-02T08:07:03+00:00 Rapid basal channel growth beneath Greenland's longest floating ice shelf Narkevic, Ash Csatho, Beata Schenk, Anton 2023 http://dx.doi.org/10.22541/essoar.167690082.29222366/v1 unknown Authorea, Inc. posted-content 2023 crwinnower https://doi.org/10.22541/essoar.167690082.29222366/v1 2024-05-07T14:19:27Z Nioghalvfjerdsfjorden Glacier (N79) is one of the two main outlets for Greenland’s largest ice stream, the Northeast Greenland Ice Stream (NEGIS), and is the more stable of the two, with no calving front retreat expected in the near future. Using a novel elevation reconstruction approach combining digital elevation models (DEMs) and laser altimetry, previously undetected local phenomena are identified complicating this assessment. N79 is found to have a complex network of basal channels that were largely stable between 1978 and 2012. Since then, an along-flow central basal channel has been growing rapidly, likely due to increased runoff and ocean temperatures, and possibly threatening to decouple the glacier’s northwestern and southeastern halves. Other/Unknown Material glacier Greenland Ice Shelf Nioghalvfjerdsfjorden The Winnower Greenland Nioghalvfjerdsfjorden ENVELOPE(-21.500,-21.500,79.500,79.500) |
institution |
Open Polar |
collection |
The Winnower |
op_collection_id |
crwinnower |
language |
unknown |
description |
Nioghalvfjerdsfjorden Glacier (N79) is one of the two main outlets for Greenland’s largest ice stream, the Northeast Greenland Ice Stream (NEGIS), and is the more stable of the two, with no calving front retreat expected in the near future. Using a novel elevation reconstruction approach combining digital elevation models (DEMs) and laser altimetry, previously undetected local phenomena are identified complicating this assessment. N79 is found to have a complex network of basal channels that were largely stable between 1978 and 2012. Since then, an along-flow central basal channel has been growing rapidly, likely due to increased runoff and ocean temperatures, and possibly threatening to decouple the glacier’s northwestern and southeastern halves. |
format |
Other/Unknown Material |
author |
Narkevic, Ash Csatho, Beata Schenk, Anton |
spellingShingle |
Narkevic, Ash Csatho, Beata Schenk, Anton Rapid basal channel growth beneath Greenland's longest floating ice shelf |
author_facet |
Narkevic, Ash Csatho, Beata Schenk, Anton |
author_sort |
Narkevic, Ash |
title |
Rapid basal channel growth beneath Greenland's longest floating ice shelf |
title_short |
Rapid basal channel growth beneath Greenland's longest floating ice shelf |
title_full |
Rapid basal channel growth beneath Greenland's longest floating ice shelf |
title_fullStr |
Rapid basal channel growth beneath Greenland's longest floating ice shelf |
title_full_unstemmed |
Rapid basal channel growth beneath Greenland's longest floating ice shelf |
title_sort |
rapid basal channel growth beneath greenland's longest floating ice shelf |
publisher |
Authorea, Inc. |
publishDate |
2023 |
url |
http://dx.doi.org/10.22541/essoar.167690082.29222366/v1 |
long_lat |
ENVELOPE(-21.500,-21.500,79.500,79.500) |
geographic |
Greenland Nioghalvfjerdsfjorden |
geographic_facet |
Greenland Nioghalvfjerdsfjorden |
genre |
glacier Greenland Ice Shelf Nioghalvfjerdsfjorden |
genre_facet |
glacier Greenland Ice Shelf Nioghalvfjerdsfjorden |
op_doi |
https://doi.org/10.22541/essoar.167690082.29222366/v1 |
_version_ |
1800752067557457920 |