A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade
Revealing the changes in the Fram Strait (FS) multiyear ice (MYI) export is crucial due to their climate relevance in the context of the loss rate of MYI being faster than that of the total ice in the Arctic. Here, we estimated winter (October–April) MYI area export through the FS over the last 2 de...
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ftmdpi:oai:mdpi.com:/2072-4292/14/11/2562/ 2023-08-20T04:04:25+02:00 A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade Yunhe Wang Haibo Bi Yu Liang agris 2022-05-27 application/pdf https://doi.org/10.3390/rs14112562 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/rs14112562 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 14; Issue 11; Pages: 2562 fram strait multiyear ice export arctic sea ice atmospheric circulation Text 2022 ftmdpi https://doi.org/10.3390/rs14112562 2023-08-01T05:11:14Z Revealing the changes in the Fram Strait (FS) multiyear ice (MYI) export is crucial due to their climate relevance in the context of the loss rate of MYI being faster than that of the total ice in the Arctic. Here, we estimated winter (October–April) MYI area export through the FS over the last 2 decades by using updated MYI concentration data retrieved from active and passive microwave satellite observations. We divided the period into two regimes relative to the ice index: D1 (2002/03–2010/11) and D2 (2012/13–2019/20). The observed variations of winter MYI exports D2 were compared with those of the previous decade D1. The results show that the MYI area exports display strong interannual variability. A significant decrease in MYI export for the periods between D1 and D2 is noted. On average, the wintertime MYI area exports declined sharply by 22% from 3.82 × 105 km2 in D1 to 3.00 × 105 km2 in D2. In addition, the percentage of MYI in the total sea ice outflow through the FS (PCM) also decreased distinctly from 72% in D1 to 59% in D2. Statistics show that weekly sea ice drift across the strait can explain 76% of the MYI area export variability. Furthermore, the dominant atmospheric drivers contributing to the decline in MYI area export during D2 were examined. In the last decade (D2), the strengthened low pressure in the North Atlantic sector, combined with an eastward shift in the axis of dipole anomaly (DA), resulted in reduced MYI advection from the Beaufort Sea and Siberian Coast toward the FS. Moreover, weakened cyclonic activity south of the FS also contributed to the reduction in MYI export during D2. Text Arctic Beaufort Sea Fram Strait North Atlantic Sea ice MDPI Open Access Publishing Arctic Remote Sensing 14 11 2562 |
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Open Polar |
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op_collection_id |
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language |
English |
topic |
fram strait multiyear ice export arctic sea ice atmospheric circulation |
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fram strait multiyear ice export arctic sea ice atmospheric circulation Yunhe Wang Haibo Bi Yu Liang A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
topic_facet |
fram strait multiyear ice export arctic sea ice atmospheric circulation |
description |
Revealing the changes in the Fram Strait (FS) multiyear ice (MYI) export is crucial due to their climate relevance in the context of the loss rate of MYI being faster than that of the total ice in the Arctic. Here, we estimated winter (October–April) MYI area export through the FS over the last 2 decades by using updated MYI concentration data retrieved from active and passive microwave satellite observations. We divided the period into two regimes relative to the ice index: D1 (2002/03–2010/11) and D2 (2012/13–2019/20). The observed variations of winter MYI exports D2 were compared with those of the previous decade D1. The results show that the MYI area exports display strong interannual variability. A significant decrease in MYI export for the periods between D1 and D2 is noted. On average, the wintertime MYI area exports declined sharply by 22% from 3.82 × 105 km2 in D1 to 3.00 × 105 km2 in D2. In addition, the percentage of MYI in the total sea ice outflow through the FS (PCM) also decreased distinctly from 72% in D1 to 59% in D2. Statistics show that weekly sea ice drift across the strait can explain 76% of the MYI area export variability. Furthermore, the dominant atmospheric drivers contributing to the decline in MYI area export during D2 were examined. In the last decade (D2), the strengthened low pressure in the North Atlantic sector, combined with an eastward shift in the axis of dipole anomaly (DA), resulted in reduced MYI advection from the Beaufort Sea and Siberian Coast toward the FS. Moreover, weakened cyclonic activity south of the FS also contributed to the reduction in MYI export during D2. |
format |
Text |
author |
Yunhe Wang Haibo Bi Yu Liang |
author_facet |
Yunhe Wang Haibo Bi Yu Liang |
author_sort |
Yunhe Wang |
title |
A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
title_short |
A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
title_full |
A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
title_fullStr |
A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
title_full_unstemmed |
A Satellite-Observed Substantial Decrease in Multiyear Ice Area Export through the Fram Strait over the Last Decade |
title_sort |
satellite-observed substantial decrease in multiyear ice area export through the fram strait over the last decade |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14112562 |
op_coverage |
agris |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Beaufort Sea Fram Strait North Atlantic Sea ice |
genre_facet |
Arctic Beaufort Sea Fram Strait North Atlantic Sea ice |
op_source |
Remote Sensing; Volume 14; Issue 11; Pages: 2562 |
op_relation |
https://dx.doi.org/10.3390/rs14112562 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs14112562 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
11 |
container_start_page |
2562 |
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1774714791956316160 |