Recent summer Arctic atmospheric circulation anomalies in a historical perspective
peer reviewed A significant increase in the summertime occurrence of a high pressure area over the Beaufort Sea, the Canadian Arctic Archipelago, and Greenland has been observed since the beginning of the 2000s, and particularly between 2007 and 2012. These circulation anomalies are likely partly re...
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Online Access: | https://orbi.uliege.be/handle/2268/175926 https://orbi.uliege.be/bitstream/2268/175926/1/tc-9-53-2015.pdf https://doi.org/10.5194/tc-9-53-2015 |
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ftorbi:oai:orbi.ulg.ac.be:2268/175926 2024-10-13T14:03:57+00:00 Recent summer Arctic atmospheric circulation anomalies in a historical perspective Belleflamme, Alexandre Fettweis, Xavier Erpicum, Michel 2015-01-07 https://orbi.uliege.be/handle/2268/175926 https://orbi.uliege.be/bitstream/2268/175926/1/tc-9-53-2015.pdf https://doi.org/10.5194/tc-9-53-2015 en eng Copernicus http://www.the-cryosphere.net/9/53/2015/tc-9-53-2015.html urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/175926 info:hdl:2268/175926 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 9, 53-64 (2015-01-07) 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 2015 ftorbi https://doi.org/10.5194/tc-9-53-2015 2024-09-27T07:01:34Z peer reviewed A significant increase in the summertime occurrence of a high pressure area over the Beaufort Sea, the Canadian Arctic Archipelago, and Greenland has been observed since the beginning of the 2000s, and particularly between 2007 and 2012. These circulation anomalies are likely partly responsible for the enhanced Greenland ice sheet melt as well as the Arctic sea ice loss observed since 2007. Therefore, it is interesting to analyse whether similar conditions might have happened since the late 19th century over the Arctic region. We have used an atmospheric circulation type classification based on daily mean sea level pressure and 500 hPa geopotential height data from five reanalysis data sets (ERA-Interim, ERA-40, NCEP/NCAR, ERA-20C, and 20CRv2) to put the recent circulation anomalies in perspective with the atmospheric circulation variability since 1871. We found that circulation conditions similar to 2007–2012 have occurred in the past, despite a higher uncertainty of the reconstructed circulation before 1940. For example, only ERA-20C shows circulation anomalies that could explain the 1920–1930 summertime Greenland warming, in contrast to 20CRv2. While the recent anomalies exceed by a factor of 2 the interannual variability of the atmospheric circulation of the Arctic region, their origin (natural variability or global warming) remains debatable. Article in Journal/Newspaper Arctic Archipelago Arctic Beaufort Sea Canadian Arctic Archipelago Global warming Greenland Ice Sheet Sea ice The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) Arctic Canadian Arctic Archipelago Greenland The Cryosphere 9 1 53 64 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Belleflamme, Alexandre Fettweis, Xavier Erpicum, Michel Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
topic_facet |
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 A significant increase in the summertime occurrence of a high pressure area over the Beaufort Sea, the Canadian Arctic Archipelago, and Greenland has been observed since the beginning of the 2000s, and particularly between 2007 and 2012. These circulation anomalies are likely partly responsible for the enhanced Greenland ice sheet melt as well as the Arctic sea ice loss observed since 2007. Therefore, it is interesting to analyse whether similar conditions might have happened since the late 19th century over the Arctic region. We have used an atmospheric circulation type classification based on daily mean sea level pressure and 500 hPa geopotential height data from five reanalysis data sets (ERA-Interim, ERA-40, NCEP/NCAR, ERA-20C, and 20CRv2) to put the recent circulation anomalies in perspective with the atmospheric circulation variability since 1871. We found that circulation conditions similar to 2007–2012 have occurred in the past, despite a higher uncertainty of the reconstructed circulation before 1940. For example, only ERA-20C shows circulation anomalies that could explain the 1920–1930 summertime Greenland warming, in contrast to 20CRv2. While the recent anomalies exceed by a factor of 2 the interannual variability of the atmospheric circulation of the Arctic region, their origin (natural variability or global warming) remains debatable. |
format |
Article in Journal/Newspaper |
author |
Belleflamme, Alexandre Fettweis, Xavier Erpicum, Michel |
author_facet |
Belleflamme, Alexandre Fettweis, Xavier Erpicum, Michel |
author_sort |
Belleflamme, Alexandre |
title |
Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
title_short |
Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
title_full |
Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
title_fullStr |
Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
title_full_unstemmed |
Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
title_sort |
recent summer arctic atmospheric circulation anomalies in a historical perspective |
publisher |
Copernicus |
publishDate |
2015 |
url |
https://orbi.uliege.be/handle/2268/175926 https://orbi.uliege.be/bitstream/2268/175926/1/tc-9-53-2015.pdf https://doi.org/10.5194/tc-9-53-2015 |
geographic |
Arctic Canadian Arctic Archipelago Greenland |
geographic_facet |
Arctic Canadian Arctic Archipelago Greenland |
genre |
Arctic Archipelago Arctic Beaufort Sea Canadian Arctic Archipelago Global warming Greenland Ice Sheet Sea ice The Cryosphere |
genre_facet |
Arctic Archipelago Arctic Beaufort Sea Canadian Arctic Archipelago Global warming Greenland Ice Sheet Sea ice The Cryosphere |
op_source |
The Cryosphere, 9, 53-64 (2015-01-07) |
op_relation |
http://www.the-cryosphere.net/9/53/2015/tc-9-53-2015.html urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/175926 info:hdl:2268/175926 |
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-9-53-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
64 |
_version_ |
1812809137260593152 |