Self-regulation of ice flow varies across the ablation area in south-west Greenland
The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole abl...
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Language: | English |
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Online Access: | https://doi.org/10.5194/tc-9-603-2015 https://doaj.org/article/59d0e40b97ce4eddad64695df7f26400 |
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ftdoajarticles:oai:doaj.org/article:59d0e40b97ce4eddad64695df7f26400 2023-05-15T16:29:01+02:00 Self-regulation of ice flow varies across the ablation area in south-west Greenland R. S. W. van de Wal C. J. P. P. Smeets W. Boot M. Stoffelen R. van Kampen S. H. Doyle F. Wilhelms M. R. van den Broeke C. H. Reijmer J. Oerlemans A. Hubbard 2015-04-01T00:00:00Z https://doi.org/10.5194/tc-9-603-2015 https://doaj.org/article/59d0e40b97ce4eddad64695df7f26400 EN eng Copernicus Publications http://www.the-cryosphere.net/9/603/2015/tc-9-603-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-603-2015 https://doaj.org/article/59d0e40b97ce4eddad64695df7f26400 The Cryosphere, Vol 9, Iss 2, Pp 603-611 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/tc-9-603-2015 2022-12-31T13:14:17Z The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere Directory of Open Access Journals: DOAJ Articles Greenland The Cryosphere 9 2 603 611 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 R. S. W. van de Wal C. J. P. P. Smeets W. Boot M. Stoffelen R. van Kampen S. H. Doyle F. Wilhelms M. R. van den Broeke C. H. Reijmer J. Oerlemans A. Hubbard Self-regulation of ice flow varies across the ablation area in south-west Greenland |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The concept of a positive feedback between ice flow and enhanced melt rates in a warmer climate fuelled the debate regarding the temporal and spatial controls on seasonal ice acceleration. Here we combine melt, basal water pressure and ice velocity data. Using 20 years of data covering the whole ablation area, we show that there is not a strong positive correlation between annual ice velocities and melt rates. Annual velocities even slightly decreased with increasing melt. Results also indicate that melt variations are most important for velocity variations in the upper ablation zone up to the equilibrium line altitude. During the extreme melt in 2012, a large velocity response near the equilibrium line was observed, highlighting the possibility of meltwater to have an impact even high on the ice sheet. This may lead to an increase of the annual ice velocity in the region above S9 and requires further monitoring. |
format |
Article in Journal/Newspaper |
author |
R. S. W. van de Wal C. J. P. P. Smeets W. Boot M. Stoffelen R. van Kampen S. H. Doyle F. Wilhelms M. R. van den Broeke C. H. Reijmer J. Oerlemans A. Hubbard |
author_facet |
R. S. W. van de Wal C. J. P. P. Smeets W. Boot M. Stoffelen R. van Kampen S. H. Doyle F. Wilhelms M. R. van den Broeke C. H. Reijmer J. Oerlemans A. Hubbard |
author_sort |
R. S. W. van de Wal |
title |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
title_short |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
title_full |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
title_fullStr |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
title_full_unstemmed |
Self-regulation of ice flow varies across the ablation area in south-west Greenland |
title_sort |
self-regulation of ice flow varies across the ablation area in south-west greenland |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-603-2015 https://doaj.org/article/59d0e40b97ce4eddad64695df7f26400 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 9, Iss 2, Pp 603-611 (2015) |
op_relation |
http://www.the-cryosphere.net/9/603/2015/tc-9-603-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-603-2015 https://doaj.org/article/59d0e40b97ce4eddad64695df7f26400 |
op_doi |
https://doi.org/10.5194/tc-9-603-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
2 |
container_start_page |
603 |
op_container_end_page |
611 |
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1766018702281539584 |