Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification
Changes in Arctic sea ice thickness are the result of complex interactions of the dynamic and variable ice cover with atmosphere and ocean. Most of the sea ice exits the Arctic Ocean through Fram Strait, which is why long-term measurements of ice thickness at the end of the Transpolar Drift provide...
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ftcopernicus:oai:publications.copernicus.org:tcd90387 2023-05-15T14:50:03+02:00 Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification Belter, H. Jakob Krumpen, Thomas Albedyll, Luisa Alekseeva, Tatiana A. Frolov, Sergei V. Hendricks, Stefan Herber, Andreas Polyakov, Igor Raphael, Ian Ricker, Robert Serovetnikov, Sergei S. Webster, Melinda Haas, Christian 2020-10-22 application/pdf https://doi.org/10.5194/tc-2020-305 https://tc.copernicus.org/preprints/tc-2020-305/ eng eng doi:10.5194/tc-2020-305 https://tc.copernicus.org/preprints/tc-2020-305/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-2020-305 2020-10-26T17:22:13Z Changes in Arctic sea ice thickness are the result of complex interactions of the dynamic and variable ice cover with atmosphere and ocean. Most of the sea ice exits the Arctic Ocean through Fram Strait, which is why long-term measurements of ice thickness at the end of the Transpolar Drift provide insight into the integrated signals of thermodynamic and dynamic influences along the pathways of Arctic sea ice. We present an updated time series of extensive ice thickness surveys carried out at the end of the Transpolar Drift between 2001 and 2020. Overall, we see a more than 20 % thinning of modal ice thickness since 2001. A comparison with first preliminary results from the international Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) shows that the modal summer thickness of the MOSAiC floe and its wider vicinity are consistent with measurements from previous years. By combining this unique time series with the Lagrangian sea ice tracking tool, ICETrack, and a simple thermodynamic sea ice growth model, we link the observed interannual ice thickness variability north of Fram Strait to increased drift speeds along the Transpolar Drift and the consequential variations in sea ice age and number of freezing degree days. We also show that the increased influence of upward-directed ocean heat flux in the eastern marginal ice zones, termed Atlantification, is not only responsible for sea ice thinning in and around the Laptev Sea, but also that the induced thickness anomalies persist beyond the Russian shelves and are potentially still measurable at the end of the Transpolar Drift after more than a year. With a tendency towards an even faster Transpolar Drift, winter sea ice growth will have less time to compensate the impact of Atlantification on sea ice growth in the eastern marginal ice zone, which will increasingly be felt in other parts of the sea ice covered Arctic. Text Arctic Arctic Ocean Fram Strait laptev Laptev Sea Sea ice Copernicus Publications: E-Journals Arctic Arctic Ocean Laptev Sea |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Changes in Arctic sea ice thickness are the result of complex interactions of the dynamic and variable ice cover with atmosphere and ocean. Most of the sea ice exits the Arctic Ocean through Fram Strait, which is why long-term measurements of ice thickness at the end of the Transpolar Drift provide insight into the integrated signals of thermodynamic and dynamic influences along the pathways of Arctic sea ice. We present an updated time series of extensive ice thickness surveys carried out at the end of the Transpolar Drift between 2001 and 2020. Overall, we see a more than 20 % thinning of modal ice thickness since 2001. A comparison with first preliminary results from the international Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) shows that the modal summer thickness of the MOSAiC floe and its wider vicinity are consistent with measurements from previous years. By combining this unique time series with the Lagrangian sea ice tracking tool, ICETrack, and a simple thermodynamic sea ice growth model, we link the observed interannual ice thickness variability north of Fram Strait to increased drift speeds along the Transpolar Drift and the consequential variations in sea ice age and number of freezing degree days. We also show that the increased influence of upward-directed ocean heat flux in the eastern marginal ice zones, termed Atlantification, is not only responsible for sea ice thinning in and around the Laptev Sea, but also that the induced thickness anomalies persist beyond the Russian shelves and are potentially still measurable at the end of the Transpolar Drift after more than a year. With a tendency towards an even faster Transpolar Drift, winter sea ice growth will have less time to compensate the impact of Atlantification on sea ice growth in the eastern marginal ice zone, which will increasingly be felt in other parts of the sea ice covered Arctic. |
format |
Text |
author |
Belter, H. Jakob Krumpen, Thomas Albedyll, Luisa Alekseeva, Tatiana A. Frolov, Sergei V. Hendricks, Stefan Herber, Andreas Polyakov, Igor Raphael, Ian Ricker, Robert Serovetnikov, Sergei S. Webster, Melinda Haas, Christian |
spellingShingle |
Belter, H. Jakob Krumpen, Thomas Albedyll, Luisa Alekseeva, Tatiana A. Frolov, Sergei V. Hendricks, Stefan Herber, Andreas Polyakov, Igor Raphael, Ian Ricker, Robert Serovetnikov, Sergei S. Webster, Melinda Haas, Christian Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
author_facet |
Belter, H. Jakob Krumpen, Thomas Albedyll, Luisa Alekseeva, Tatiana A. Frolov, Sergei V. Hendricks, Stefan Herber, Andreas Polyakov, Igor Raphael, Ian Ricker, Robert Serovetnikov, Sergei S. Webster, Melinda Haas, Christian |
author_sort |
Belter, H. Jakob |
title |
Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
title_short |
Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
title_full |
Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
title_fullStr |
Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
title_full_unstemmed |
Interannual variability in Transpolar Drift ice thickness and potential impact of Atlantification |
title_sort |
interannual variability in transpolar drift ice thickness and potential impact of atlantification |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-2020-305 https://tc.copernicus.org/preprints/tc-2020-305/ |
geographic |
Arctic Arctic Ocean Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Laptev Sea |
genre |
Arctic Arctic Ocean Fram Strait laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Fram Strait laptev Laptev Sea Sea ice |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-2020-305 https://tc.copernicus.org/preprints/tc-2020-305/ |
op_doi |
https://doi.org/10.5194/tc-2020-305 |
_version_ |
1766321140833189888 |