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://eprints.utas.edu.au/33926/ https://eprints.utas.edu.au/33926/1/139717%20-%20Drift%20of%20pancake%20ice%20floes%20in%20the%20winter%20Antarctic%20Marginal%20Ice%20Zone.pdf |
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ftunivtasmania:oai:eprints.utas.edu.au:33926 2023-05-15T13:31:54+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 application/pdf https://eprints.utas.edu.au/33926/ https://eprints.utas.edu.au/33926/1/139717%20-%20Drift%20of%20pancake%20ice%20floes%20in%20the%20winter%20Antarctic%20Marginal%20Ice%20Zone.pdf en eng Wiley-Blackwell Publishing Inc. https://eprints.utas.edu.au/33926/1/139717%20-%20Drift%20of%20pancake%20ice%20floes%20in%20the%20winter%20Antarctic%20Marginal%20Ice%20Zone.pdf Alberello, A, Bennetts, L, Heil, P, Eayrs, C, Vichi, M, MacHutchon, K, Onorato, M and Toffoli, A 2020 , 'Drift of pancake ice floes in the winter Antarctic Marginal Ice Zone during polar cyclones' , JGR Oceans, vol. 125, no. 3 , pp. 1-16 , doi:10.1029/2019JC015418 <http://dx.doi.org/10.1029/2019JC015418>. pancake ice Antarctic Marginal Ice Zone wave-ice interaction buoy Article PeerReviewed 2020 ftunivtasmania https://doi.org/10.1029/2019JC015418 2021-10-04T22:18:08Z 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 Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Pancake ENVELOPE(-55.815,-55.815,52.600,52.600) Journal of Geophysical Research: Oceans 125 3 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
pancake ice Antarctic Marginal Ice Zone wave-ice interaction buoy |
spellingShingle |
pancake ice Antarctic Marginal Ice Zone wave-ice interaction buoy 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 |
pancake ice Antarctic Marginal Ice Zone wave-ice interaction buoy |
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://eprints.utas.edu.au/33926/ https://eprints.utas.edu.au/33926/1/139717%20-%20Drift%20of%20pancake%20ice%20floes%20in%20the%20winter%20Antarctic%20Marginal%20Ice%20Zone.pdf |
long_lat |
ENVELOPE(-55.815,-55.815,52.600,52.600) |
geographic |
Antarctic Southern Ocean The Antarctic Pancake |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pancake |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_relation |
https://eprints.utas.edu.au/33926/1/139717%20-%20Drift%20of%20pancake%20ice%20floes%20in%20the%20winter%20Antarctic%20Marginal%20Ice%20Zone.pdf Alberello, A, Bennetts, L, Heil, P, Eayrs, C, Vichi, M, MacHutchon, K, Onorato, M and Toffoli, A 2020 , 'Drift of pancake ice floes in the winter Antarctic Marginal Ice Zone during polar cyclones' , JGR Oceans, vol. 125, no. 3 , pp. 1-16 , doi:10.1029/2019JC015418 <http://dx.doi.org/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_ |
1766022266735296512 |