Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf
Antarctic continental shelf waters are poorly sampled, particularly beneath sea ice during winter. Profiling floats could help fill this gap, but floats are unable to surface to obtain a satellite position when ice is present. We deployed Argo profiling floats in a coastal polynya with a novel missi...
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Amer Geophysical Union
2020
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Online Access: | https://doi.org/10.1029/2020GL087019 http://ecite.utas.edu.au/143653 |
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ftunivtasecite:oai:ecite.utas.edu.au:143653 2023-05-15T13:42:40+02:00 Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf Wallace, LO van Wijk, EM Rintoul, SR Hally, B 2020 application/pdf https://doi.org/10.1029/2020GL087019 http://ecite.utas.edu.au/143653 en eng Amer Geophysical Union http://ecite.utas.edu.au/143653/1/143653 - Bathymetry-constrained navigation of Argo floats.pdf http://dx.doi.org/10.1029/2020GL087019 Wallace, LO and van Wijk, EM and Rintoul, SR and Hally, B, Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf, Geophysical Research Letters, 47, (11) Article e2020GL087019. ISSN 0094-8276 (2020) [Refereed Article] http://ecite.utas.edu.au/143653 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2020GL087019 2022-08-30T09:11:43Z Antarctic continental shelf waters are poorly sampled, particularly beneath sea ice during winter. Profiling floats could help fill this gap, but floats are unable to surface to obtain a satellite position when ice is present. We deployed Argo profiling floats in a coastal polynya with a novel mission to rest on the sea floor between profiles. Parking on the seabed minimized the drift of the floats and allowed year‐round, full‐depth measurements over multiple winters. Measurements of water depth derived from the floats were used in combination with known bathymetry to constrain the position of profiles collected under ice. Errors were quantified by withholding known positions and comparing them to estimated positions; the bathymetrically constrained algorithm outperformed linear interpolation. A similar approach could potentially be used to geolocate other under‐ice oceanographic platforms that measure water depth. Article in Journal/Newspaper Antarc* Antarctic Sea ice eCite UTAS (University of Tasmania) Antarctic The Antarctic Geophysical Research Letters 47 11 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical oceanography |
spellingShingle |
Earth Sciences Oceanography Physical oceanography Wallace, LO van Wijk, EM Rintoul, SR Hally, B Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
Antarctic continental shelf waters are poorly sampled, particularly beneath sea ice during winter. Profiling floats could help fill this gap, but floats are unable to surface to obtain a satellite position when ice is present. We deployed Argo profiling floats in a coastal polynya with a novel mission to rest on the sea floor between profiles. Parking on the seabed minimized the drift of the floats and allowed year‐round, full‐depth measurements over multiple winters. Measurements of water depth derived from the floats were used in combination with known bathymetry to constrain the position of profiles collected under ice. Errors were quantified by withholding known positions and comparing them to estimated positions; the bathymetrically constrained algorithm outperformed linear interpolation. A similar approach could potentially be used to geolocate other under‐ice oceanographic platforms that measure water depth. |
format |
Article in Journal/Newspaper |
author |
Wallace, LO van Wijk, EM Rintoul, SR Hally, B |
author_facet |
Wallace, LO van Wijk, EM Rintoul, SR Hally, B |
author_sort |
Wallace, LO |
title |
Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
title_short |
Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
title_full |
Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
title_fullStr |
Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
title_full_unstemmed |
Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf |
title_sort |
bathymetry-constrained navigation of argo floats under sea ice on the antarctic continental shelf |
publisher |
Amer Geophysical Union |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020GL087019 http://ecite.utas.edu.au/143653 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_relation |
http://ecite.utas.edu.au/143653/1/143653 - Bathymetry-constrained navigation of Argo floats.pdf http://dx.doi.org/10.1029/2020GL087019 Wallace, LO and van Wijk, EM and Rintoul, SR and Hally, B, Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf, Geophysical Research Letters, 47, (11) Article e2020GL087019. ISSN 0094-8276 (2020) [Refereed Article] http://ecite.utas.edu.au/143653 |
op_doi |
https://doi.org/10.1029/2020GL087019 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
11 |
_version_ |
1766171217025302528 |