The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007
Recent studies have reported a shift in the Arctic sea ice to a younger state after around 2007. This study reveals that this shift can be primarily attributed to a stepwise-type reduction in the extent of 4 years or older (4+ year) ice and its linked survivability. After this shift, the fraction of...
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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143024000339/type/journal_article |
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| author | Qi Shan Ke Fan Jiping Liu |
| author_facet | Qi Shan Ke Fan Jiping Liu |
| author_sort | Qi Shan |
| collection | DOAJ |
| description | Recent studies have reported a shift in the Arctic sea ice to a younger state after around 2007. This study reveals that this shift can be primarily attributed to a stepwise-type reduction in the extent of 4 years or older (4+ year) ice and its linked survivability. After this shift, the fraction of 4+ year ice extent relative to the total ice changed from 30.5 to 10.0%. Sea-ice survivability can serve as a key indicator of sea-ice persistence in response to other factors. We demonstrate that the decrease of 4+ year ice is controlled by the decrease of its linked survivability in a non-linear manner, signifying small alterations in the survivability can result in relatively large changes in the extent of 4+ year ice. The decrease in survivability is affected by both winter and summer processes. Summer melting contributed the most, while the contribution of the export through Fram Strait was minor. However, the significant rise in residual loss during the growth season suggests that other winter processes may also have played an important role. |
| format | Article |
| id | doaj-art-7bdea0447c4e4b009414abdf6c2117bb |
| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
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| series | Journal of Glaciology |
| spelling | doaj-art-7bdea0447c4e4b009414abdf6c2117bb2025-01-16T21:50:11ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2024.33The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007Qi Shan0https://orcid.org/0000-0002-2463-2403Ke Fan1Jiping Liu2Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China University of the Chinese Academy of Sciences, Beijing 100049, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, ChinaSchool of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, ChinaRecent studies have reported a shift in the Arctic sea ice to a younger state after around 2007. This study reveals that this shift can be primarily attributed to a stepwise-type reduction in the extent of 4 years or older (4+ year) ice and its linked survivability. After this shift, the fraction of 4+ year ice extent relative to the total ice changed from 30.5 to 10.0%. Sea-ice survivability can serve as a key indicator of sea-ice persistence in response to other factors. We demonstrate that the decrease of 4+ year ice is controlled by the decrease of its linked survivability in a non-linear manner, signifying small alterations in the survivability can result in relatively large changes in the extent of 4+ year ice. The decrease in survivability is affected by both winter and summer processes. Summer melting contributed the most, while the contribution of the export through Fram Strait was minor. However, the significant rise in residual loss during the growth season suggests that other winter processes may also have played an important role.https://www.cambridge.org/core/product/identifier/S0022143024000339/type/journal_articleclimate changeice and climatesea ice |
| spellingShingle | Qi Shan Ke Fan Jiping Liu The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 Journal of Glaciology climate change ice and climate sea ice |
| title | The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 |
| title_full | The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 |
| title_fullStr | The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 |
| title_full_unstemmed | The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 |
| title_short | The stepwise decrease of 4+ year ice extent and its linked survivability since around 2007 |
| title_sort | stepwise decrease of 4 year ice extent and its linked survivability since around 2007 |
| topic | climate change ice and climate sea ice |
| url | https://www.cambridge.org/core/product/identifier/S0022143024000339/type/journal_article |
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