Recent summer Arctic atmospheric circulation anomalies in a historical perspective
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...
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ftdoajarticles:oai:doaj.org/article:c563b37367f7456280a08f534c427d6a 2023-05-15T14:28:52+02:00 Recent summer Arctic atmospheric circulation anomalies in a historical perspective A. Belleflamme X. Fettweis M. Erpicum 2015-01-01T00:00:00Z https://doi.org/10.5194/tc-9-53-2015 https://doaj.org/article/c563b37367f7456280a08f534c427d6a EN eng Copernicus Publications http://www.the-cryosphere.net/9/53/2015/tc-9-53-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-53-2015 https://doaj.org/article/c563b37367f7456280a08f534c427d6a The Cryosphere, Vol 9, Iss 1, Pp 53-64 (2015) Environmental sciences GE1-350 Geology QE1-996.5 article 2015 ftdoajarticles https://doi.org/10.5194/tc-9-53-2015 2022-12-31T14:34:23Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Canadian Arctic Archipelago Greenland The Cryosphere 9 1 53 64 |
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 A. Belleflamme X. Fettweis M. Erpicum Recent summer Arctic atmospheric circulation anomalies in a historical perspective |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
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 |
A. Belleflamme X. Fettweis M. Erpicum |
author_facet |
A. Belleflamme X. Fettweis M. Erpicum |
author_sort |
A. Belleflamme |
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 Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/tc-9-53-2015 https://doaj.org/article/c563b37367f7456280a08f534c427d6a |
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, Vol 9, Iss 1, Pp 53-64 (2015) |
op_relation |
http://www.the-cryosphere.net/9/53/2015/tc-9-53-2015.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-9-53-2015 https://doaj.org/article/c563b37367f7456280a08f534c427d6a |
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_ |
1766303006062542848 |