On the recent contribution of the Greenland ice sheet to sea level change
peer reviewed We assess the recent contribution of the Greenland ice sheet (GrIS) to sea level change. We use the mass budget method, which quantifies ice sheet mass balance (MB) as the difference between surface mass balance (SMB) and solid ice discharge across the grounding line (D). A comparison...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus GmbH
2016
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Online Access: | https://orbi.uliege.be/handle/2268/301897 https://orbi.uliege.be/bitstream/2268/301897/1/VandenBroeke_TC_2016.pdf https://doi.org/10.5194/tc-10-1933-2016 |
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ftorbi:oai:orbi.ulg.ac.be:2268/301897 2024-04-21T08:03:39+00:00 On the recent contribution of the Greenland ice sheet to sea level change Van Den Broeke, Michiel R. Enderlin, Ellyn M. Howat, Ian M. Kuipers Munneke, Peter Noël, Brice Jan Van De Berg, Willem Van Meijgaard, Erik Wouters, Bert 2016-09-06 https://orbi.uliege.be/handle/2268/301897 https://orbi.uliege.be/bitstream/2268/301897/1/VandenBroeke_TC_2016.pdf https://doi.org/10.5194/tc-10-1933-2016 en eng Copernicus GmbH https://tc.copernicus.org/articles/10/1933/2016/tc-10-1933-2016.pdf urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/301897 info:hdl:2268/301897 https://orbi.uliege.be/bitstream/2268/301897/1/VandenBroeke_TC_2016.pdf doi:10.5194/tc-10-1933-2016 scopus-id:2-s2.0-84986294540 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 10 (5), 1933 - 1946 (2016-09-06) Water Science and Technology Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2016 ftorbi https://doi.org/10.5194/tc-10-1933-2016 2024-03-27T14:58:15Z peer reviewed We assess the recent contribution of the Greenland ice sheet (GrIS) to sea level change. We use the mass budget method, which quantifies ice sheet mass balance (MB) as the difference between surface mass balance (SMB) and solid ice discharge across the grounding line (D). A comparison with independent gravity change observations from GRACE shows good agreement for the overlapping period 2002-2015, giving confidence in the partitioning of recent GrIS mass changes. The estimated 1995 value of D and the 1958-1995 average value of SMB are similar at 411 and 418Gt yr-1, respectively, suggesting that ice flow in the mid-1990s was well adjusted to the average annual mass input, reminiscent of an ice sheet in approximate balance. Starting in the early to mid-1990s, SMB decreased while D increased, leading to quasi-persistent negative MB. About 60% of the associated mass loss since 1991 is caused by changes in SMB and the remainder by D. The decrease in SMB is fully driven by an increase in surface melt and subsequent meltwater runoff, which is slightly compensated by a small ( < 3%) increase in snowfall. The excess runoff originates from low-lying (< 2000ma.s.l.) parts of the ice sheet; higher up, increased refreezing prevents runoff of meltwater from occurring, at the expense of increased firn temperatures and depleted pore space. With a 1991-2015 average annual mass loss of ∼ 0.47±0.23mm sea level equivalent (SLE) and a peak contribution of 1.2mm SLE in 2012, the GrIS has recently become a major source of global mean sea level rise. Article in Journal/Newspaper Greenland Ice Sheet The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) The Cryosphere 10 5 1933 1946 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Water Science and Technology Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Water Science and Technology Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Van Den Broeke, Michiel R. Enderlin, Ellyn M. Howat, Ian M. Kuipers Munneke, Peter Noël, Brice Jan Van De Berg, Willem Van Meijgaard, Erik Wouters, Bert On the recent contribution of the Greenland ice sheet to sea level change |
topic_facet |
Water Science and Technology Earth-Surface Processes Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed We assess the recent contribution of the Greenland ice sheet (GrIS) to sea level change. We use the mass budget method, which quantifies ice sheet mass balance (MB) as the difference between surface mass balance (SMB) and solid ice discharge across the grounding line (D). A comparison with independent gravity change observations from GRACE shows good agreement for the overlapping period 2002-2015, giving confidence in the partitioning of recent GrIS mass changes. The estimated 1995 value of D and the 1958-1995 average value of SMB are similar at 411 and 418Gt yr-1, respectively, suggesting that ice flow in the mid-1990s was well adjusted to the average annual mass input, reminiscent of an ice sheet in approximate balance. Starting in the early to mid-1990s, SMB decreased while D increased, leading to quasi-persistent negative MB. About 60% of the associated mass loss since 1991 is caused by changes in SMB and the remainder by D. The decrease in SMB is fully driven by an increase in surface melt and subsequent meltwater runoff, which is slightly compensated by a small ( < 3%) increase in snowfall. The excess runoff originates from low-lying (< 2000ma.s.l.) parts of the ice sheet; higher up, increased refreezing prevents runoff of meltwater from occurring, at the expense of increased firn temperatures and depleted pore space. With a 1991-2015 average annual mass loss of ∼ 0.47±0.23mm sea level equivalent (SLE) and a peak contribution of 1.2mm SLE in 2012, the GrIS has recently become a major source of global mean sea level rise. |
format |
Article in Journal/Newspaper |
author |
Van Den Broeke, Michiel R. Enderlin, Ellyn M. Howat, Ian M. Kuipers Munneke, Peter Noël, Brice Jan Van De Berg, Willem Van Meijgaard, Erik Wouters, Bert |
author_facet |
Van Den Broeke, Michiel R. Enderlin, Ellyn M. Howat, Ian M. Kuipers Munneke, Peter Noël, Brice Jan Van De Berg, Willem Van Meijgaard, Erik Wouters, Bert |
author_sort |
Van Den Broeke, Michiel R. |
title |
On the recent contribution of the Greenland ice sheet to sea level change |
title_short |
On the recent contribution of the Greenland ice sheet to sea level change |
title_full |
On the recent contribution of the Greenland ice sheet to sea level change |
title_fullStr |
On the recent contribution of the Greenland ice sheet to sea level change |
title_full_unstemmed |
On the recent contribution of the Greenland ice sheet to sea level change |
title_sort |
on the recent contribution of the greenland ice sheet to sea level change |
publisher |
Copernicus GmbH |
publishDate |
2016 |
url |
https://orbi.uliege.be/handle/2268/301897 https://orbi.uliege.be/bitstream/2268/301897/1/VandenBroeke_TC_2016.pdf https://doi.org/10.5194/tc-10-1933-2016 |
genre |
Greenland Ice Sheet The Cryosphere |
genre_facet |
Greenland Ice Sheet The Cryosphere |
op_source |
The Cryosphere, 10 (5), 1933 - 1946 (2016-09-06) |
op_relation |
https://tc.copernicus.org/articles/10/1933/2016/tc-10-1933-2016.pdf urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/301897 info:hdl:2268/301897 https://orbi.uliege.be/bitstream/2268/301897/1/VandenBroeke_TC_2016.pdf doi:10.5194/tc-10-1933-2016 scopus-id:2-s2.0-84986294540 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-10-1933-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
5 |
container_start_page |
1933 |
op_container_end_page |
1946 |
_version_ |
1796943416422039552 |