Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones
High temporal resolution in situ measurements of pancake ice drift are presented, from a pair of buoys deployed on floes in the Antarctic marginal ice zone during the winter sea ice expansion, over 9 days in which the region was impacted by four polar cyclones. Concomitant measurements of wave-in-ic...
Published in: | Journal of Geophysical Research: Oceans |
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Language: | English |
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2020
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Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/82081/ https://ueaeprints.uea.ac.uk/id/eprint/82081/1/Published_Version.pdf https://doi.org/10.1029/2019JC015418 |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:82081 2023-05-15T14:04:01+02:00 Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones Alberello, Alberto Bennetts, Luke Heil, Petra Eayrs, Clare Vichi, Marcello MacHutchon, Keith Onorato, Miguel Toffoli, Alessandro 2020-03 application/pdf https://ueaeprints.uea.ac.uk/id/eprint/82081/ https://ueaeprints.uea.ac.uk/id/eprint/82081/1/Published_Version.pdf https://doi.org/10.1029/2019JC015418 en eng https://ueaeprints.uea.ac.uk/id/eprint/82081/1/Published_Version.pdf Alberello, Alberto, Bennetts, Luke, Heil, Petra, Eayrs, Clare, Vichi, Marcello, MacHutchon, Keith, Onorato, Miguel and Toffoli, Alessandro (2020) Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones. Journal of Geophysical Research: Oceans, 125 (3). ISSN 2169-9275 doi:10.1029/2019JC015418 Article PeerReviewed 2020 ftuniveastangl https://doi.org/10.1029/2019JC015418 2023-01-30T21:56:02Z High temporal resolution in situ measurements of pancake ice drift are presented, from a pair of buoys deployed on floes in the Antarctic marginal ice zone during the winter sea ice expansion, over 9 days in which the region was impacted by four polar cyclones. Concomitant measurements of wave-in-ice activity from the buoys are used to infer that the ice remained unconsolidated, and pancake ice conditions were maintained over at least the first 7 days. Analysis of the data shows (i) the fastest reported ice drift speeds in the Southern Ocean; (ii) high correlation of drift velocities with the surface wind velocities, indicating absence of internal ice stresses >100 km from the ice edge where remotely sensed ice concentration is 100%; and (iii) presence of a strong inertial signature with a 13 hr period. A Lagrangian free drift model is developed, including a term for geostrophic currents that reproduce the 13 hr period signature in the ice motion. The calibrated model provides accurate predictions of the ice drift for up to 2 days, and the calibrated parameters provide estimates of wind and ocean drag for pancake floes under storm conditions. Article in Journal/Newspaper Antarc* Antarctic Sea ice Southern Ocean University of East Anglia: UEA Digital Repository Antarctic Pancake ENVELOPE(-55.815,-55.815,52.600,52.600) Southern Ocean The Antarctic Journal of Geophysical Research: Oceans 125 3 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
English |
description |
High temporal resolution in situ measurements of pancake ice drift are presented, from a pair of buoys deployed on floes in the Antarctic marginal ice zone during the winter sea ice expansion, over 9 days in which the region was impacted by four polar cyclones. Concomitant measurements of wave-in-ice activity from the buoys are used to infer that the ice remained unconsolidated, and pancake ice conditions were maintained over at least the first 7 days. Analysis of the data shows (i) the fastest reported ice drift speeds in the Southern Ocean; (ii) high correlation of drift velocities with the surface wind velocities, indicating absence of internal ice stresses >100 km from the ice edge where remotely sensed ice concentration is 100%; and (iii) presence of a strong inertial signature with a 13 hr period. A Lagrangian free drift model is developed, including a term for geostrophic currents that reproduce the 13 hr period signature in the ice motion. The calibrated model provides accurate predictions of the ice drift for up to 2 days, and the calibrated parameters provide estimates of wind and ocean drag for pancake floes under storm conditions. |
format |
Article in Journal/Newspaper |
author |
Alberello, Alberto Bennetts, Luke Heil, Petra Eayrs, Clare Vichi, Marcello MacHutchon, Keith Onorato, Miguel Toffoli, Alessandro |
spellingShingle |
Alberello, Alberto Bennetts, Luke Heil, Petra Eayrs, Clare Vichi, Marcello MacHutchon, Keith Onorato, Miguel Toffoli, Alessandro Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
author_facet |
Alberello, Alberto Bennetts, Luke Heil, Petra Eayrs, Clare Vichi, Marcello MacHutchon, Keith Onorato, Miguel Toffoli, Alessandro |
author_sort |
Alberello, Alberto |
title |
Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
title_short |
Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
title_full |
Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
title_fullStr |
Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
title_full_unstemmed |
Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
title_sort |
drift of pancake ice floes in the winter antarctic marginal ice zone during polar cyclones |
publishDate |
2020 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/82081/ https://ueaeprints.uea.ac.uk/id/eprint/82081/1/Published_Version.pdf https://doi.org/10.1029/2019JC015418 |
long_lat |
ENVELOPE(-55.815,-55.815,52.600,52.600) |
geographic |
Antarctic Pancake Southern Ocean The Antarctic |
geographic_facet |
Antarctic Pancake Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
https://ueaeprints.uea.ac.uk/id/eprint/82081/1/Published_Version.pdf Alberello, Alberto, Bennetts, Luke, Heil, Petra, Eayrs, Clare, Vichi, Marcello, MacHutchon, Keith, Onorato, Miguel and Toffoli, Alessandro (2020) Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones. Journal of Geophysical Research: Oceans, 125 (3). ISSN 2169-9275 doi:10.1029/2019JC015418 |
op_doi |
https://doi.org/10.1029/2019JC015418 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
3 |
_version_ |
1766274966824681472 |