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Bathymetry-constrained navigation of Argo floats under sea ice on the Antarctic Continental Shelf


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]

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Copyright Statement

2020. American Geophysical Union.

DOI: doi:10.1029/2020GL087019


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.

Item Details

Item Type:Refereed Article
Keywords:Argo profiling floats, navigation, sea ice, Antarctic continental shelf, polynya
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical oceanography
Objective Division:Environmental Management
Objective Group:Management of Antarctic and Southern Ocean environments
Objective Field:Antarctic and Southern Ocean ice dynamics
UTAS Author:van Wijk, EM (Ms Esmee van Wijk)
UTAS Author:Rintoul, SR (Dr Steve Rintoul)
ID Code:143653
Year Published:2020
Web of Science® Times Cited:4
Deposited By:Oceans and Cryosphere
Deposited On:2021-03-29
Last Modified:2021-09-09
Downloads:7 View Download Statistics

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