Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007
Remarkably low mean September sea ice area in the Canadian Arctic Archipelago (CAA) was observed in 2011 (146 × 10 3 km 2 ), a record-breaking level that was nearly exceeded in 2012 (150 × 10 3 km 2 ). These values were lower than previous September records set in 1998 (200 × 10 3 km 2 ) and 2007 (2...
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ftdoajarticles:oai:doaj.org/article:44477868c6eb42bfbca911c53ddd3807 2023-05-15T14:28:47+02:00 Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 S. E. L. Howell T. Wohlleben A. Komarov L. Pizzolato C. Derksen 2013-11-01T00:00:00Z https://doi.org/10.5194/tc-7-1753-2013 https://doaj.org/article/44477868c6eb42bfbca911c53ddd3807 EN eng Copernicus Publications http://www.the-cryosphere.net/7/1753/2013/tc-7-1753-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-7-1753-2013 https://doaj.org/article/44477868c6eb42bfbca911c53ddd3807 The Cryosphere, Vol 7, Iss 6, Pp 1753-1768 (2013) Environmental sciences GE1-350 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/tc-7-1753-2013 2022-12-31T14:40:38Z Remarkably low mean September sea ice area in the Canadian Arctic Archipelago (CAA) was observed in 2011 (146 × 10 3 km 2 ), a record-breaking level that was nearly exceeded in 2012 (150 × 10 3 km 2 ). These values were lower than previous September records set in 1998 (200 × 10 3 km 2 ) and 2007 (220 × 10 3 km 2 ), and are ∼60% lower than the 1981–2010 mean September climatology. In this study, the processes contributing to the extreme light years of 2011 and 2012 were investigated, compared to previous extreme minima of 1998 and 2007, and contrasted against historic summer seasons with above average September ice area. The 2011 minimum was associated with positive June through September (JJAS) surface air temperature (SAT) and net solar radiation ( K * ) anomalies that facilitated rapid melt, coupled with atmospheric circulation that restricted multi-year ice (MYI) inflow from the Arctic Ocean into the CAA. The 2012 minimum was also associated with positive JJAS SAT and K * anomalies with coincident rapid melt, but further ice decline was temporarily mitigated by atmospheric circulation which drove Arctic Ocean MYI inflow into the CAA. Atmospheric circulation was comparable between 2011 and 1998 (impeding Arctic Ocean MYI inflow) and 2012 and 2007 (inducing Arctic Ocean MYI inflow). However, preconditioning was more apparent leading up to 2011 and 2012 than 1998 and 2007. The rapid melt process in 2011 and 2012 was more intense than observed in 1998 and 2007 because of the thinner ice cover being more susceptible to anomalous thermodynamic forcing. The thinner sea ice cover within the CAA in recent years has also helped counteract the processes that facilitate extreme heavy ice years. The recent extreme light years within the CAA are associated with a longer navigation season within the Northwest Passage. Article in Journal/Newspaper Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Northwest passage Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Passage The Cryosphere 7 6 1753 1768 |
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 S. E. L. Howell T. Wohlleben A. Komarov L. Pizzolato C. Derksen Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Remarkably low mean September sea ice area in the Canadian Arctic Archipelago (CAA) was observed in 2011 (146 × 10 3 km 2 ), a record-breaking level that was nearly exceeded in 2012 (150 × 10 3 km 2 ). These values were lower than previous September records set in 1998 (200 × 10 3 km 2 ) and 2007 (220 × 10 3 km 2 ), and are ∼60% lower than the 1981–2010 mean September climatology. In this study, the processes contributing to the extreme light years of 2011 and 2012 were investigated, compared to previous extreme minima of 1998 and 2007, and contrasted against historic summer seasons with above average September ice area. The 2011 minimum was associated with positive June through September (JJAS) surface air temperature (SAT) and net solar radiation ( K * ) anomalies that facilitated rapid melt, coupled with atmospheric circulation that restricted multi-year ice (MYI) inflow from the Arctic Ocean into the CAA. The 2012 minimum was also associated with positive JJAS SAT and K * anomalies with coincident rapid melt, but further ice decline was temporarily mitigated by atmospheric circulation which drove Arctic Ocean MYI inflow into the CAA. Atmospheric circulation was comparable between 2011 and 1998 (impeding Arctic Ocean MYI inflow) and 2012 and 2007 (inducing Arctic Ocean MYI inflow). However, preconditioning was more apparent leading up to 2011 and 2012 than 1998 and 2007. The rapid melt process in 2011 and 2012 was more intense than observed in 1998 and 2007 because of the thinner ice cover being more susceptible to anomalous thermodynamic forcing. The thinner sea ice cover within the CAA in recent years has also helped counteract the processes that facilitate extreme heavy ice years. The recent extreme light years within the CAA are associated with a longer navigation season within the Northwest Passage. |
format |
Article in Journal/Newspaper |
author |
S. E. L. Howell T. Wohlleben A. Komarov L. Pizzolato C. Derksen |
author_facet |
S. E. L. Howell T. Wohlleben A. Komarov L. Pizzolato C. Derksen |
author_sort |
S. E. L. Howell |
title |
Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
title_short |
Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
title_full |
Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
title_fullStr |
Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
title_full_unstemmed |
Recent extreme light sea ice years in the Canadian Arctic Archipelago: 2011 and 2012 eclipse 1998 and 2007 |
title_sort |
recent extreme light sea ice years in the canadian arctic archipelago: 2011 and 2012 eclipse 1998 and 2007 |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-1753-2013 https://doaj.org/article/44477868c6eb42bfbca911c53ddd3807 |
geographic |
Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Passage |
geographic_facet |
Arctic Arctic Ocean Canadian Arctic Archipelago Northwest Passage |
genre |
Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Northwest passage Sea ice The Cryosphere |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Canadian Arctic Archipelago Northwest passage Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 7, Iss 6, Pp 1753-1768 (2013) |
op_relation |
http://www.the-cryosphere.net/7/1753/2013/tc-7-1753-2013.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 1994-0416 1994-0424 doi:10.5194/tc-7-1753-2013 https://doaj.org/article/44477868c6eb42bfbca911c53ddd3807 |
op_doi |
https://doi.org/10.5194/tc-7-1753-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
6 |
container_start_page |
1753 |
op_container_end_page |
1768 |
_version_ |
1766302946076655616 |