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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Wiley-Blackwell Publishing Inc.
2020
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Online Access: | https://doi.org/10.1029/2019JC015418 http://ecite.utas.edu.au/139717 |
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ftunivtasecite:oai:ecite.utas.edu.au:139717 2023-05-15T13:42:40+02:00 Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones Alberello, A Bennetts, L Heil, P Eayrs, C Vichi, M MacHutchon, K Onorato, M Toffoli, A 2020 https://doi.org/10.1029/2019JC015418 http://ecite.utas.edu.au/139717 en eng Wiley-Blackwell Publishing Inc. http://dx.doi.org/10.1029/2019JC015418 Alberello, A and Bennetts, L and Heil, P and Eayrs, C and Vichi, M and MacHutchon, K and Onorato, M and Toffoli, A, Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones, JGR Oceans, 125, (3) Article e2019JC015418. ISSN 2169-9275 (2020) [Refereed Article] http://ecite.utas.edu.au/139717 Earth Sciences Other earth sciences Other earth sciences not elsewhere classified Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2019JC015418 2022-08-29T22:18:01Z 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 eCite UTAS (University of Tasmania) 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 |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Other earth sciences Other earth sciences not elsewhere classified |
spellingShingle |
Earth Sciences Other earth sciences Other earth sciences not elsewhere classified Alberello, A Bennetts, L Heil, P Eayrs, C Vichi, M MacHutchon, K Onorato, M Toffoli, A Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones |
topic_facet |
Earth Sciences Other earth sciences Other earth sciences not elsewhere classified |
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, A Bennetts, L Heil, P Eayrs, C Vichi, M MacHutchon, K Onorato, M Toffoli, A |
author_facet |
Alberello, A Bennetts, L Heil, P Eayrs, C Vichi, M MacHutchon, K Onorato, M Toffoli, A |
author_sort |
Alberello, A |
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 |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2020 |
url |
https://doi.org/10.1029/2019JC015418 http://ecite.utas.edu.au/139717 |
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 |
http://dx.doi.org/10.1029/2019JC015418 Alberello, A and Bennetts, L and Heil, P and Eayrs, C and Vichi, M and MacHutchon, K and Onorato, M and Toffoli, A, Drift of pancake ice floes in the winter Antarctic marginal ice zone during polar cyclones, JGR Oceans, 125, (3) Article e2019JC015418. ISSN 2169-9275 (2020) [Refereed Article] http://ecite.utas.edu.au/139717 |
op_doi |
https://doi.org/10.1029/2019JC015418 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
3 |
_version_ |
1766171146357571584 |