Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data
A combined analysis of remote sensing observations, regional climate model (RCM) outputs and reanalysis data over the Greenland ice sheet provides evidence that multiple records were set during summer 2012. Melt extent was the largest in the satellite era (extending up to ∼97% of the ice sheet) and...
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Copernicus Publications
2013
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Online Access: | https://doi.org/10.5194/tc-7-615-2013 http://www.the-cryosphere.net/7/615/2013/tc-7-615-2013.pdf https://doaj.org/article/b3b1880c59214e8792bd4f39c07dc5b7 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:b3b1880c59214e8792bd4f39c07dc5b7 2023-05-15T16:26:51+02:00 Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data M. Tedesco X. Fettweis T. Mote J. Wahr P. Alexander J. E. Box B. Wouters 2013-04-01 https://doi.org/10.5194/tc-7-615-2013 http://www.the-cryosphere.net/7/615/2013/tc-7-615-2013.pdf https://doaj.org/article/b3b1880c59214e8792bd4f39c07dc5b7 en eng Copernicus Publications doi:10.5194/tc-7-615-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/615/2013/tc-7-615-2013.pdf https://doaj.org/article/b3b1880c59214e8792bd4f39c07dc5b7 undefined The Cryosphere, Vol 7, Iss 2, Pp 615-630 (2013) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2013 fttriple https://doi.org/10.5194/tc-7-615-2013 2023-01-22T18:19:42Z A combined analysis of remote sensing observations, regional climate model (RCM) outputs and reanalysis data over the Greenland ice sheet provides evidence that multiple records were set during summer 2012. Melt extent was the largest in the satellite era (extending up to ∼97% of the ice sheet) and melting lasted up to ∼2 months longer than the 1979–2011 mean. Model results indicate that near surface temperature was ∼3 standard deviations (σ) above the 1958–2011 mean, while surface mass balance (SMB) was ∼3σ below the mean and runoff was 3.9σ above the mean over the same period. Albedo, exposure of bare ice and surface mass balance also set new records, as did the total mass balance with summer and annual mass changes of, respectively, −627 Gt and −574 Gt, 2σ below the 2003–2012 mean. We identify persistent anticyclonic conditions over Greenland associated with anomalies in the North Atlantic Oscillation (NAO), changes in surface conditions (e.g., albedo, surface temperature) and preconditioning of surface properties from recent extreme melting as major driving mechanisms for the 2012 records. Less positive if not increasingly negative SMB will likely occur should these characteristics persist. Article in Journal/Newspaper Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere Unknown Greenland The Cryosphere 7 2 615 630 |
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Open Polar |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir M. Tedesco X. Fettweis T. Mote J. Wahr P. Alexander J. E. Box B. Wouters Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
topic_facet |
geo envir |
description |
A combined analysis of remote sensing observations, regional climate model (RCM) outputs and reanalysis data over the Greenland ice sheet provides evidence that multiple records were set during summer 2012. Melt extent was the largest in the satellite era (extending up to ∼97% of the ice sheet) and melting lasted up to ∼2 months longer than the 1979–2011 mean. Model results indicate that near surface temperature was ∼3 standard deviations (σ) above the 1958–2011 mean, while surface mass balance (SMB) was ∼3σ below the mean and runoff was 3.9σ above the mean over the same period. Albedo, exposure of bare ice and surface mass balance also set new records, as did the total mass balance with summer and annual mass changes of, respectively, −627 Gt and −574 Gt, 2σ below the 2003–2012 mean. We identify persistent anticyclonic conditions over Greenland associated with anomalies in the North Atlantic Oscillation (NAO), changes in surface conditions (e.g., albedo, surface temperature) and preconditioning of surface properties from recent extreme melting as major driving mechanisms for the 2012 records. Less positive if not increasingly negative SMB will likely occur should these characteristics persist. |
format |
Article in Journal/Newspaper |
author |
M. Tedesco X. Fettweis T. Mote J. Wahr P. Alexander J. E. Box B. Wouters |
author_facet |
M. Tedesco X. Fettweis T. Mote J. Wahr P. Alexander J. E. Box B. Wouters |
author_sort |
M. Tedesco |
title |
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
title_short |
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
title_full |
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
title_fullStr |
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
title_full_unstemmed |
Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data |
title_sort |
evidence and analysis of 2012 greenland records from spaceborne observations, a regional climate model and reanalysis data |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-615-2013 http://www.the-cryosphere.net/7/615/2013/tc-7-615-2013.pdf https://doaj.org/article/b3b1880c59214e8792bd4f39c07dc5b7 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
genre_facet |
Greenland Ice Sheet North Atlantic North Atlantic oscillation The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 2, Pp 615-630 (2013) |
op_relation |
doi:10.5194/tc-7-615-2013 1994-0416 1994-0424 http://www.the-cryosphere.net/7/615/2013/tc-7-615-2013.pdf https://doaj.org/article/b3b1880c59214e8792bd4f39c07dc5b7 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-7-615-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
2 |
container_start_page |
615 |
op_container_end_page |
630 |
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1766015850963271680 |