How reversible is sea ice loss?
It is well accepted that increasing atmospheric CO 2 results in global warming, leading to a decline in polar sea ice area. Here, the specific question of whether there is a tipping point in the sea ice cover is investigated. The global climate model HadCM3 is used to map the trajectory of sea ice a...
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ftdoajarticles:oai:doaj.org/article:461138d84f7d4780a8297452b31f75c8 2023-05-15T14:02:12+02:00 How reversible is sea ice loss? J. K. Ridley J. A. Lowe H. T. Hewitt 2012-02-01T00:00:00Z https://doi.org/10.5194/tc-6-193-2012 https://doaj.org/article/461138d84f7d4780a8297452b31f75c8 EN eng Copernicus Publications http://www.the-cryosphere.net/6/193/2012/tc-6-193-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-193-2012 1994-0416 1994-0424 https://doaj.org/article/461138d84f7d4780a8297452b31f75c8 The Cryosphere, Vol 6, Iss 1, Pp 193-198 (2012) Environmental sciences GE1-350 Geology QE1-996.5 article 2012 ftdoajarticles https://doi.org/10.5194/tc-6-193-2012 2022-12-31T10:06:21Z It is well accepted that increasing atmospheric CO 2 results in global warming, leading to a decline in polar sea ice area. Here, the specific question of whether there is a tipping point in the sea ice cover is investigated. The global climate model HadCM3 is used to map the trajectory of sea ice area under idealised scenarios. The atmospheric CO 2 is first ramped up to four times pre-industrial levels (4 × CO 2 ), then ramped down to pre-industrial levels. We also examine the impact of stabilising climate at 4 × CO 2 prior to ramping CO 2 down to pre-industrial levels. Against global mean temperature, Arctic sea ice area is reversible, while the Antarctic sea ice shows some asymmetric behaviour – its rate of change slower, with falling temperatures, than its rate of change with rising temperatures. However, we show that the asymmetric behaviour is driven by hemispherical differences in temperature change between transient and stabilisation periods. We find no irreversible behaviour in the sea ice cover. Article in Journal/Newspaper Antarc* Antarctic Arctic Global warming Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Antarctic The Antarctic The Cryosphere 6 1 193 198 |
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 J. K. Ridley J. A. Lowe H. T. Hewitt How reversible is sea ice loss? |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
It is well accepted that increasing atmospheric CO 2 results in global warming, leading to a decline in polar sea ice area. Here, the specific question of whether there is a tipping point in the sea ice cover is investigated. The global climate model HadCM3 is used to map the trajectory of sea ice area under idealised scenarios. The atmospheric CO 2 is first ramped up to four times pre-industrial levels (4 × CO 2 ), then ramped down to pre-industrial levels. We also examine the impact of stabilising climate at 4 × CO 2 prior to ramping CO 2 down to pre-industrial levels. Against global mean temperature, Arctic sea ice area is reversible, while the Antarctic sea ice shows some asymmetric behaviour – its rate of change slower, with falling temperatures, than its rate of change with rising temperatures. However, we show that the asymmetric behaviour is driven by hemispherical differences in temperature change between transient and stabilisation periods. We find no irreversible behaviour in the sea ice cover. |
format |
Article in Journal/Newspaper |
author |
J. K. Ridley J. A. Lowe H. T. Hewitt |
author_facet |
J. K. Ridley J. A. Lowe H. T. Hewitt |
author_sort |
J. K. Ridley |
title |
How reversible is sea ice loss? |
title_short |
How reversible is sea ice loss? |
title_full |
How reversible is sea ice loss? |
title_fullStr |
How reversible is sea ice loss? |
title_full_unstemmed |
How reversible is sea ice loss? |
title_sort |
how reversible is sea ice loss? |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/tc-6-193-2012 https://doaj.org/article/461138d84f7d4780a8297452b31f75c8 |
geographic |
Arctic Antarctic The Antarctic |
geographic_facet |
Arctic Antarctic The Antarctic |
genre |
Antarc* Antarctic Arctic Global warming Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Arctic Global warming Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 6, Iss 1, Pp 193-198 (2012) |
op_relation |
http://www.the-cryosphere.net/6/193/2012/tc-6-193-2012.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-6-193-2012 1994-0416 1994-0424 https://doaj.org/article/461138d84f7d4780a8297452b31f75c8 |
op_doi |
https://doi.org/10.5194/tc-6-193-2012 |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
1 |
container_start_page |
193 |
op_container_end_page |
198 |
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1766272332923404288 |