Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19
Arctic sea ice kinematics and deformation play significant roles in heat and momentum exchange between the atmosphere and ocean, and at the same time they have profound impacts on biological processes and biogeochemical cycles. However, the mechanisms regulating their changes on seasonal scales and...
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ftcopernicus:oai:publications.copernicus.org:tc87235 2023-05-15T14:55:34+02:00 Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 Lei, Ruibo Hoppmann, Mario Cheng, Bin Zuo, Guangyu Gui, Dawei Cai, Qiongqiong Belter, H. Jakob Yang, Wangxiao 2021-03-12 application/pdf https://doi.org/10.5194/tc-15-1321-2021 https://tc.copernicus.org/articles/15/1321/2021/ eng eng doi:10.5194/tc-15-1321-2021 https://tc.copernicus.org/articles/15/1321/2021/ eISSN: 1994-0424 Text 2021 ftcopernicus https://doi.org/10.5194/tc-15-1321-2021 2021-03-15T17:22:14Z Arctic sea ice kinematics and deformation play significant roles in heat and momentum exchange between the atmosphere and ocean, and at the same time they have profound impacts on biological processes and biogeochemical cycles. However, the mechanisms regulating their changes on seasonal scales and their spatial variability remain poorly understood. Using position data recorded by 32 buoys in the Pacific sector of the Arctic Ocean (PAO), we characterized the spatiotemporal variations in ice kinematics and deformation for autumn–winter 2018/19, during the transition from a melting sea ice regime to a nearly consolidated ice pack. In autumn, the response of the sea ice drift to wind and inertial forcing was stronger in the southern and western PAO compared to the northern and eastern PAO. These spatial heterogeneities gradually weakened from autumn to winter, in line with the seasonal increases in ice concentration and thickness. Correspondingly, ice deformation became much more localized as the sea ice mechanical strength increased, with the area proportion occupied by the strongest (15 %) ice deformation decreasing by about 50 % from autumn to winter. During the freezing season, ice deformation rate in the northern PAO was about 2.5 times higher than in the western PAO and probably related to the higher spatial heterogeneity of oceanic and atmospheric forcing in the north. North–south and east–west gradients in sea ice kinematics and deformation within the PAO, as observed especially during autumn in this study, are likely to become more pronounced in the future as a result of a longer melt season, especially in the western and southern parts. Text Arctic Arctic Ocean ice pack Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Pacific The Cryosphere 15 3 1321 1341 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
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English |
description |
Arctic sea ice kinematics and deformation play significant roles in heat and momentum exchange between the atmosphere and ocean, and at the same time they have profound impacts on biological processes and biogeochemical cycles. However, the mechanisms regulating their changes on seasonal scales and their spatial variability remain poorly understood. Using position data recorded by 32 buoys in the Pacific sector of the Arctic Ocean (PAO), we characterized the spatiotemporal variations in ice kinematics and deformation for autumn–winter 2018/19, during the transition from a melting sea ice regime to a nearly consolidated ice pack. In autumn, the response of the sea ice drift to wind and inertial forcing was stronger in the southern and western PAO compared to the northern and eastern PAO. These spatial heterogeneities gradually weakened from autumn to winter, in line with the seasonal increases in ice concentration and thickness. Correspondingly, ice deformation became much more localized as the sea ice mechanical strength increased, with the area proportion occupied by the strongest (15 %) ice deformation decreasing by about 50 % from autumn to winter. During the freezing season, ice deformation rate in the northern PAO was about 2.5 times higher than in the western PAO and probably related to the higher spatial heterogeneity of oceanic and atmospheric forcing in the north. North–south and east–west gradients in sea ice kinematics and deformation within the PAO, as observed especially during autumn in this study, are likely to become more pronounced in the future as a result of a longer melt season, especially in the western and southern parts. |
format |
Text |
author |
Lei, Ruibo Hoppmann, Mario Cheng, Bin Zuo, Guangyu Gui, Dawei Cai, Qiongqiong Belter, H. Jakob Yang, Wangxiao |
spellingShingle |
Lei, Ruibo Hoppmann, Mario Cheng, Bin Zuo, Guangyu Gui, Dawei Cai, Qiongqiong Belter, H. Jakob Yang, Wangxiao Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
author_facet |
Lei, Ruibo Hoppmann, Mario Cheng, Bin Zuo, Guangyu Gui, Dawei Cai, Qiongqiong Belter, H. Jakob Yang, Wangxiao |
author_sort |
Lei, Ruibo |
title |
Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
title_short |
Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
title_full |
Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
title_fullStr |
Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
title_full_unstemmed |
Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19 |
title_sort |
seasonal changes in sea ice kinematics and deformation in the pacific sector of the arctic ocean in 2018/19 |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-1321-2021 https://tc.copernicus.org/articles/15/1321/2021/ |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean ice pack Sea ice |
genre_facet |
Arctic Arctic Ocean ice pack Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-15-1321-2021 https://tc.copernicus.org/articles/15/1321/2021/ |
op_doi |
https://doi.org/10.5194/tc-15-1321-2021 |
container_title |
The Cryosphere |
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15 |
container_issue |
3 |
container_start_page |
1321 |
op_container_end_page |
1341 |
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1766327599950200832 |