Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ...
Supraglacial lake drainage events influence Greenland Ice Sheet dynamics on hourly to interannual timescales. However, direct observations are rare, and, to date, no in situ studies exist from fast-flowing sectors of the ice sheet. Here, we present observations of a rapid lake drainage event at Stor...
Main Authors: | , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Proceedings of the National Academy of Sciences
2019
|
Subjects: | |
Online Access: | https://dx.doi.org/10.17863/cam.46643 https://www.repository.cam.ac.uk/handle/1810/299570 |
id |
ftdatacite:10.17863/cam.46643 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.17863/cam.46643 2024-02-27T08:40:43+00:00 Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... Chudley, Thomas R Christoffersen, Poul Doyle, Samuel H Bougamont, Marion Schoonman, Charlotte M Hubbard, Bryn James, Mike R 2019 https://dx.doi.org/10.17863/cam.46643 https://www.repository.cam.ac.uk/handle/1810/299570 en eng Proceedings of the National Academy of Sciences Greenland glaciology hydrology ice sheets lakes article-journal ScholarlyArticle JournalArticle Article 2019 ftdatacite https://doi.org/10.17863/cam.46643 2024-02-01T15:00:47Z Supraglacial lake drainage events influence Greenland Ice Sheet dynamics on hourly to interannual timescales. However, direct observations are rare, and, to date, no in situ studies exist from fast-flowing sectors of the ice sheet. Here, we present observations of a rapid lake drainage event at Store Glacier, west Greenland, in 2018. The drainage event transported 4.8 × 106 m3 of meltwater to the glacier bed in ∼5 h, reducing the lake to a third of its original volume. During drainage, the local ice surface rose by 0.55 m, and surface velocity increased from 2.0 m⋅d-1 to 5.3 m⋅d-1 Dynamic responses were greatest ∼4 km downstream from the lake, which we interpret as an area of transient water storage constrained by basal topography. Drainage initiated, without any precursory trigger, when the lake expanded and reactivated a preexisting fracture that had been responsible for a drainage event 1 y earlier. Since formation, this fracture had advected ∼500 m from the lake's deepest point, meaning the lake did not ... Article in Journal/Newspaper glacier Greenland greenlandic Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) Greenland Rapid Lake ENVELOPE(177.619,177.619,52.064,52.064) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Greenland glaciology hydrology ice sheets lakes |
spellingShingle |
Greenland glaciology hydrology ice sheets lakes Chudley, Thomas R Christoffersen, Poul Doyle, Samuel H Bougamont, Marion Schoonman, Charlotte M Hubbard, Bryn James, Mike R Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
topic_facet |
Greenland glaciology hydrology ice sheets lakes |
description |
Supraglacial lake drainage events influence Greenland Ice Sheet dynamics on hourly to interannual timescales. However, direct observations are rare, and, to date, no in situ studies exist from fast-flowing sectors of the ice sheet. Here, we present observations of a rapid lake drainage event at Store Glacier, west Greenland, in 2018. The drainage event transported 4.8 × 106 m3 of meltwater to the glacier bed in ∼5 h, reducing the lake to a third of its original volume. During drainage, the local ice surface rose by 0.55 m, and surface velocity increased from 2.0 m⋅d-1 to 5.3 m⋅d-1 Dynamic responses were greatest ∼4 km downstream from the lake, which we interpret as an area of transient water storage constrained by basal topography. Drainage initiated, without any precursory trigger, when the lake expanded and reactivated a preexisting fracture that had been responsible for a drainage event 1 y earlier. Since formation, this fracture had advected ∼500 m from the lake's deepest point, meaning the lake did not ... |
format |
Article in Journal/Newspaper |
author |
Chudley, Thomas R Christoffersen, Poul Doyle, Samuel H Bougamont, Marion Schoonman, Charlotte M Hubbard, Bryn James, Mike R |
author_facet |
Chudley, Thomas R Christoffersen, Poul Doyle, Samuel H Bougamont, Marion Schoonman, Charlotte M Hubbard, Bryn James, Mike R |
author_sort |
Chudley, Thomas R |
title |
Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
title_short |
Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
title_full |
Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
title_fullStr |
Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
title_full_unstemmed |
Supraglacial lake drainage at a fast-flowing Greenlandic outlet glacier. ... |
title_sort |
supraglacial lake drainage at a fast-flowing greenlandic outlet glacier. ... |
publisher |
Proceedings of the National Academy of Sciences |
publishDate |
2019 |
url |
https://dx.doi.org/10.17863/cam.46643 https://www.repository.cam.ac.uk/handle/1810/299570 |
long_lat |
ENVELOPE(177.619,177.619,52.064,52.064) |
geographic |
Greenland Rapid Lake |
geographic_facet |
Greenland Rapid Lake |
genre |
glacier Greenland greenlandic Ice Sheet |
genre_facet |
glacier Greenland greenlandic Ice Sheet |
op_doi |
https://doi.org/10.17863/cam.46643 |
_version_ |
1792047861093892096 |