Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming
The Greenland ice sheet has been one of the largest contributors to global sea-level rise over the past 20 years, accounting for 0.5 mm yr−1 of a total of 3.2 mm yr−1. A significant portion of this contribution is associated with the speed-up of an increased number of glaciers in southeast and north...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/296064 2023-11-12T04:17:27+01:00 Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming Khan, S.A. Kjaer, K.H. No Value van den Broeke, M.R. Muresan, I.S. Marine and Atmospheric Research Sub Dynamics Meteorology 2014 text/plain https://dspace.library.uu.nl/handle/1874/296064 en eng 1758-678X https://dspace.library.uu.nl/handle/1874/296064 info:eu-repo/semantics/OpenAccess Article 2014 ftunivutrecht 2023-11-01T23:12:31Z The Greenland ice sheet has been one of the largest contributors to global sea-level rise over the past 20 years, accounting for 0.5 mm yr−1 of a total of 3.2 mm yr−1. A significant portion of this contribution is associated with the speed-up of an increased number of glaciers in southeast and northwest Greenland. Here, we show that the northeast Greenland ice stream, which extends more than 600 km into the interior of the ice sheet, is now undergoing sustained dynamic thinning, linked to regional warming, after more than a quarter of a century of stability. This sector of the Greenland ice sheet is of particular interest, because the drainage basin area covers 16% of the ice sheet (twice that of Jakobshavn Isbræ) and numerical model predictions suggest no significant mass loss for this sector, leading to an under-estimation of future global sea-level rise. The geometry of the bedrock and monotonic trend in glacier speed-up and mass loss suggests that dynamic drawdown of ice in this region will continue in the near future. Article in Journal/Newspaper glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ Utrecht University Repository Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
description |
The Greenland ice sheet has been one of the largest contributors to global sea-level rise over the past 20 years, accounting for 0.5 mm yr−1 of a total of 3.2 mm yr−1. A significant portion of this contribution is associated with the speed-up of an increased number of glaciers in southeast and northwest Greenland. Here, we show that the northeast Greenland ice stream, which extends more than 600 km into the interior of the ice sheet, is now undergoing sustained dynamic thinning, linked to regional warming, after more than a quarter of a century of stability. This sector of the Greenland ice sheet is of particular interest, because the drainage basin area covers 16% of the ice sheet (twice that of Jakobshavn Isbræ) and numerical model predictions suggest no significant mass loss for this sector, leading to an under-estimation of future global sea-level rise. The geometry of the bedrock and monotonic trend in glacier speed-up and mass loss suggests that dynamic drawdown of ice in this region will continue in the near future. |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology |
format |
Article in Journal/Newspaper |
author |
Khan, S.A. Kjaer, K.H. No Value van den Broeke, M.R. Muresan, I.S. |
spellingShingle |
Khan, S.A. Kjaer, K.H. No Value van den Broeke, M.R. Muresan, I.S. Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
author_facet |
Khan, S.A. Kjaer, K.H. No Value van den Broeke, M.R. Muresan, I.S. |
author_sort |
Khan, S.A. |
title |
Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
title_short |
Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
title_full |
Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
title_fullStr |
Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
title_full_unstemmed |
Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming |
title_sort |
sustained mass loss of the northeast greenland ice sheet triggered by regional warming |
publishDate |
2014 |
url |
https://dspace.library.uu.nl/handle/1874/296064 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Greenland Jakobshavn Isbræ |
geographic_facet |
Greenland Jakobshavn Isbræ |
genre |
glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
genre_facet |
glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ |
op_relation |
1758-678X https://dspace.library.uu.nl/handle/1874/296064 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782334338383216640 |