Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone
Abstract Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-08467-z |
| _version_ | 1830415544942067712 |
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| author | Haruhiko Kashiwase Kay I. Ohshima Sohey Nihashi Hajo Eicken |
| author_facet | Haruhiko Kashiwase Kay I. Ohshima Sohey Nihashi Hajo Eicken |
| author_sort | Haruhiko Kashiwase |
| collection | DOAJ |
| description | Abstract Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we provide quantitative evidence that heat input through the open water fraction is the primary driver of seasonal and interannual variations in Arctic sea ice retreat. Analyses of satellite data (1979–2014) and a simplified ice-upper ocean coupled model reveal that divergent ice motion in the early melt season triggers large-scale feedback which subsequently amplifies summer sea ice anomalies. The magnitude of divergence controlling the feedback has doubled since 2000 due to a more mobile ice cover, which can partly explain the recent drastic ice reduction in the Arctic Ocean. |
| first_indexed | 2024-12-20T21:06:03Z |
| format | Article |
| id | doaj.art-845d663f1df24bc397b513047721d59c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T21:06:03Z |
| publishDate | 2017-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-845d663f1df24bc397b513047721d59c2022-12-21T19:26:36ZengNature PortfolioScientific Reports2045-23222017-08-017111010.1038/s41598-017-08467-zEvidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zoneHaruhiko Kashiwase0Kay I. Ohshima1Sohey Nihashi2Hajo Eicken3National Institute of Polar ResearchInstitute of Low Temperature Science, Hokkaido UniversityNational Institute of Technology, Tomakomai CollegeInternational Arctic Research Center, University of Alaska FairbanksAbstract Ice-albedo feedback due to the albedo contrast between water and ice is a major factor in seasonal sea ice retreat, and has received increasing attention with the Arctic Ocean shifting to a seasonal ice cover. However, quantitative evaluation of such feedbacks is still insufficient. Here we provide quantitative evidence that heat input through the open water fraction is the primary driver of seasonal and interannual variations in Arctic sea ice retreat. Analyses of satellite data (1979–2014) and a simplified ice-upper ocean coupled model reveal that divergent ice motion in the early melt season triggers large-scale feedback which subsequently amplifies summer sea ice anomalies. The magnitude of divergence controlling the feedback has doubled since 2000 due to a more mobile ice cover, which can partly explain the recent drastic ice reduction in the Arctic Ocean.https://doi.org/10.1038/s41598-017-08467-z |
| spellingShingle | Haruhiko Kashiwase Kay I. Ohshima Sohey Nihashi Hajo Eicken Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone Scientific Reports |
| title | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
| title_full | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
| title_fullStr | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
| title_full_unstemmed | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
| title_short | Evidence for ice-ocean albedo feedback in the Arctic Ocean shifting to a seasonal ice zone |
| title_sort | evidence for ice ocean albedo feedback in the arctic ocean shifting to a seasonal ice zone |
| url | https://doi.org/10.1038/s41598-017-08467-z |
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