Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya?
In February and March 2018 a unique polynya of open water had opened in the Wandel Sea north of Greenland due to unusually strong southerly winds. The polynya subsequently refroze and the area of the growing young ice strongly decreased by ice convergence due to northerly winds, constituting a natur...
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ftawi:oai:epic.awi.de:50347 2023-05-15T16:27:10+02:00 Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? von Albedyll, Luisa Haas, Christian Hollands, Thomas Dierking, Wolfgang Krumpen, Thomas Hendricks, Stefan Rohde, Jan Kauker, Frank 2019-06-17 application/pdf https://epic.awi.de/id/eprint/50347/ https://epic.awi.de/id/eprint/50347/1/9thIICWG_2019_vonAlbedyll.pdf https://hdl.handle.net/10013/epic.59dddb50-ee9c-410c-bf5e-882ba3418c7a https://hdl.handle.net/ unknown https://epic.awi.de/id/eprint/50347/1/9thIICWG_2019_vonAlbedyll.pdf https://hdl.handle.net/ von Albedyll, L. orcid:0000-0002-6768-0368 , Haas, C. orcid:0000-0002-7674-3500 , Hollands, T. orcid:0000-0003-0824-4037 , Dierking, W. orcid:0000-0002-5031-648X , Krumpen, T. orcid:0000-0001-6234-8756 , Hendricks, S. orcid:0000-0002-1412-3146 , Rohde, J. and Kauker, F. orcid:0000-0002-7976-3005 (2019) Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? , 9th International Workshop on Sea Ice Modelling, Data Assimilation and Verification, Bremen, 17 June 2019 - 17 June 2019 . hdl:10013/epic.59dddb50-ee9c-410c-bf5e-882ba3418c7a EPIC39th International Workshop on Sea Ice Modelling, Data Assimilation and Verification, Bremen, 2019-06-17-2019-06-17 Conference notRev 2019 ftawi 2021-12-24T15:44:58Z In February and March 2018 a unique polynya of open water had opened in the Wandel Sea north of Greenland due to unusually strong southerly winds. The polynya subsequently refroze and the area of the growing young ice strongly decreased by ice convergence due to northerly winds, constituting a natural, well-constrained, full-scale ice deformation experiment. We have carried out an airborne electromagnetic ice thickness survey of the young ice one month after the polynya began to close. It showed a thickness distribution with a modal ice thickness of 1 m and mean thickness of 2 m, representative of the contributions of thermodynamic and dynamic growth in the one month since the ice had begun to grow. We used time series of Sentinel 1 SAR images to back-track the surveyed young ice to its location of initial formation. Results showed that the area of young ice approximately halved between the time of its formation and the time of the ice thickness survey. This is in good qualitative agreement with the result of the thickness survey, showing that its mean thickness was twice its modal thickness, i.e. mean ice thickness doubled while the region's area halved. These results and the SAR observed deformation processes provide valuable information for improving representation of ice rheology and thickness redistribution in sea ice models. Conference Object Greenland North Greenland Sea ice Wandel Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Wandel ENVELOPE(-64.000,-64.000,-65.083,-65.083) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In February and March 2018 a unique polynya of open water had opened in the Wandel Sea north of Greenland due to unusually strong southerly winds. The polynya subsequently refroze and the area of the growing young ice strongly decreased by ice convergence due to northerly winds, constituting a natural, well-constrained, full-scale ice deformation experiment. We have carried out an airborne electromagnetic ice thickness survey of the young ice one month after the polynya began to close. It showed a thickness distribution with a modal ice thickness of 1 m and mean thickness of 2 m, representative of the contributions of thermodynamic and dynamic growth in the one month since the ice had begun to grow. We used time series of Sentinel 1 SAR images to back-track the surveyed young ice to its location of initial formation. Results showed that the area of young ice approximately halved between the time of its formation and the time of the ice thickness survey. This is in good qualitative agreement with the result of the thickness survey, showing that its mean thickness was twice its modal thickness, i.e. mean ice thickness doubled while the region's area halved. These results and the SAR observed deformation processes provide valuable information for improving representation of ice rheology and thickness redistribution in sea ice models. |
format |
Conference Object |
author |
von Albedyll, Luisa Haas, Christian Hollands, Thomas Dierking, Wolfgang Krumpen, Thomas Hendricks, Stefan Rohde, Jan Kauker, Frank |
spellingShingle |
von Albedyll, Luisa Haas, Christian Hollands, Thomas Dierking, Wolfgang Krumpen, Thomas Hendricks, Stefan Rohde, Jan Kauker, Frank Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
author_facet |
von Albedyll, Luisa Haas, Christian Hollands, Thomas Dierking, Wolfgang Krumpen, Thomas Hendricks, Stefan Rohde, Jan Kauker, Frank |
author_sort |
von Albedyll, Luisa |
title |
Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
title_short |
Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
title_full |
Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
title_fullStr |
Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
title_full_unstemmed |
Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? |
title_sort |
ice thickness and deformation in the 2018 greenland polynya - how much did deformation contribute to sea ice thickness change in the north greenland polynya? |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/50347/ https://epic.awi.de/id/eprint/50347/1/9thIICWG_2019_vonAlbedyll.pdf https://hdl.handle.net/10013/epic.59dddb50-ee9c-410c-bf5e-882ba3418c7a https://hdl.handle.net/ |
long_lat |
ENVELOPE(-64.000,-64.000,-65.083,-65.083) |
geographic |
Greenland Wandel |
geographic_facet |
Greenland Wandel |
genre |
Greenland North Greenland Sea ice Wandel Sea |
genre_facet |
Greenland North Greenland Sea ice Wandel Sea |
op_source |
EPIC39th International Workshop on Sea Ice Modelling, Data Assimilation and Verification, Bremen, 2019-06-17-2019-06-17 |
op_relation |
https://epic.awi.de/id/eprint/50347/1/9thIICWG_2019_vonAlbedyll.pdf https://hdl.handle.net/ von Albedyll, L. orcid:0000-0002-6768-0368 , Haas, C. orcid:0000-0002-7674-3500 , Hollands, T. orcid:0000-0003-0824-4037 , Dierking, W. orcid:0000-0002-5031-648X , Krumpen, T. orcid:0000-0001-6234-8756 , Hendricks, S. orcid:0000-0002-1412-3146 , Rohde, J. and Kauker, F. orcid:0000-0002-7976-3005 (2019) Ice Thickness and Deformation in the 2018 Greenland Polynya - How much did deformation contribute to sea ice thickness change in the North Greenland Polynya? , 9th International Workshop on Sea Ice Modelling, Data Assimilation and Verification, Bremen, 17 June 2019 - 17 June 2019 . hdl:10013/epic.59dddb50-ee9c-410c-bf5e-882ba3418c7a |
_version_ |
1766016257986920448 |