Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles
Satellites have documented trends in Antarctic sea-ice extent and its variability for decades, but estimating sea-ice thickness in the Antarctic from remote sensing data remains challenging. In situ observations needed for validation of remote sensing data and sea-ice models are limited; most have b...
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Online Access: | https://doi.org/10.1038/ngeo2299 http://ecite.utas.edu.au/96863 |
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ftunivtasecite:oai:ecite.utas.edu.au:96863 2023-05-15T13:37:24+02:00 Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles Williams, GD Maksym, T Wilkinson, J Kunz, C Murphy, C Kimball, P Singh, H 2014 https://doi.org/10.1038/ngeo2299 http://ecite.utas.edu.au/96863 en eng Nature Publishing Group http://dx.doi.org/10.1038/ngeo2299 Williams, GD and Maksym, T and Wilkinson, J and Kunz, C and Murphy, C and Kimball, P and Singh, H, Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles, Nature Geoscience, 8, (1) pp. 61-67. ISSN 1752-0894 (2014) [Refereed Article] http://ecite.utas.edu.au/96863 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2014 ftunivtasecite https://doi.org/10.1038/ngeo2299 2019-12-13T21:59:08Z Satellites have documented trends in Antarctic sea-ice extent and its variability for decades, but estimating sea-ice thickness in the Antarctic from remote sensing data remains challenging. In situ observations needed for validation of remote sensing data and sea-ice models are limited; most have been restricted to a few point measurements on selected ice floes, or to visual shipboard estimates. Here we present three-dimensional (3D) floe-scale maps of sea-ice draft for ten floes, compiled from two springtime expeditions by an autonomous underwater vehicle to the near-coastal regions of the Weddell, Bellingshausen, and Wilkes Land sectors of Antarctica. Mean drafts range from 1.4 to 5.5 m, with maxima up to 16 m. We also find that, on average, 76% of the ice volume is deformed ice. Our surveys indicate that the floes are much thicker and more deformed than reported by most drilling and ship-based measurements of Antarctic sea ice. We suggest that thick ice in the near-coastal and interior pack may be under-represented in existing in situ assessments of Antarctic sea ice and hence, on average, Antarctic sea ice may be thicker than previously thought. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Wilkes Land eCite UTAS (University of Tasmania) Antarctic The Antarctic Weddell Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Nature Geoscience 8 1 61 67 |
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Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Williams, GD Maksym, T Wilkinson, J Kunz, C Murphy, C Kimball, P Singh, H Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Satellites have documented trends in Antarctic sea-ice extent and its variability for decades, but estimating sea-ice thickness in the Antarctic from remote sensing data remains challenging. In situ observations needed for validation of remote sensing data and sea-ice models are limited; most have been restricted to a few point measurements on selected ice floes, or to visual shipboard estimates. Here we present three-dimensional (3D) floe-scale maps of sea-ice draft for ten floes, compiled from two springtime expeditions by an autonomous underwater vehicle to the near-coastal regions of the Weddell, Bellingshausen, and Wilkes Land sectors of Antarctica. Mean drafts range from 1.4 to 5.5 m, with maxima up to 16 m. We also find that, on average, 76% of the ice volume is deformed ice. Our surveys indicate that the floes are much thicker and more deformed than reported by most drilling and ship-based measurements of Antarctic sea ice. We suggest that thick ice in the near-coastal and interior pack may be under-represented in existing in situ assessments of Antarctic sea ice and hence, on average, Antarctic sea ice may be thicker than previously thought. |
format |
Article in Journal/Newspaper |
author |
Williams, GD Maksym, T Wilkinson, J Kunz, C Murphy, C Kimball, P Singh, H |
author_facet |
Williams, GD Maksym, T Wilkinson, J Kunz, C Murphy, C Kimball, P Singh, H |
author_sort |
Williams, GD |
title |
Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
title_short |
Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
title_full |
Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
title_fullStr |
Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
title_full_unstemmed |
Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles |
title_sort |
thick and deformed antarctic sea ice mapped with autonomous underwater vehicles |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
https://doi.org/10.1038/ngeo2299 http://ecite.utas.edu.au/96863 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic The Antarctic Weddell Wilkes Land |
geographic_facet |
Antarctic The Antarctic Weddell Wilkes Land |
genre |
Antarc* Antarctic Antarctica Sea ice Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Wilkes Land |
op_relation |
http://dx.doi.org/10.1038/ngeo2299 Williams, GD and Maksym, T and Wilkinson, J and Kunz, C and Murphy, C and Kimball, P and Singh, H, Thick and deformed Antarctic sea ice mapped with autonomous underwater vehicles, Nature Geoscience, 8, (1) pp. 61-67. ISSN 1752-0894 (2014) [Refereed Article] http://ecite.utas.edu.au/96863 |
op_doi |
https://doi.org/10.1038/ngeo2299 |
container_title |
Nature Geoscience |
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8 |
container_issue |
1 |
container_start_page |
61 |
op_container_end_page |
67 |
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1766091423548964864 |