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Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf

Created 13/03/2025

Updated 13/03/2025

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These are seal dive data used in the paper "Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf" The seal dive depths provide new ocean depth information from over 500,000 individual dives from 265 seals on the East Antarctica continental shelf. The seal tags have a post-processed position uncertainty of 2-3 km, and provide transmitted depth data with a resolution of 10-25 m. About 25% of these seal dives were, on average, 220 m (sometimes over 1000 m) deeper than the interpolated seafloor in the International Bathymetric Chart of the Southern Ocean Version 2 Each row is an individual dive collected by a SMRU CTD-SLDR and transmitted via system Argos. Max_depth is the maximum depth reached by the seal on that dive. The lons and lats are estimates of the seals location at the end of that dive and were calculated using the AniMotum package in R, which uses a state Space Model to estimate a location for each dive. The uncertainty of these locations has been quantified to be a median error of 3.2 km (95th percentile = 12.1 km), relative to near-simultaneous GPS locations for the same seals (Jonsen, I. D. et al. A continuous-time state-space model for rapid quality control of Argos locations from animal-borne tags. Move. Ecol. 8, 31 (2020). https://doi.org:10.1186/s40462-020-00217-7). The columns are: Id = seal identifier date = date/time in YYYY-mm-dd HH:MM:SS format lon = longitude lat = latitude max_depth = maximum depth of the dive. Depths are negative to match the IBCSO data ibcso2 = IBCSO V2 bathymetry at that point dfb = distance from bathymetry calculated as ibcso2-depth, so that a positive value indicates the dive was deeper than IBCSO species= species of seal that collected the data (Mirounga leonina or Leptonchtyes weddellii)

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Title Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/87b84283-0045-4a50-936b-bedd4ab5a8b3
Contact Point
CSIRO Oceans & Atmosphere
metadata@aad.gov.au
Reference Period 01/01/1996 - 31/12/1997
Geospatial Coverage {"type": "Polygon", "coordinates": [[[19.6875, -75.0], [150.46875, -75.0], [150.46875, -57.70415], [19.6875, -57.70415], [19.6875, -75.0]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on data.gov.au "Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf". Please visit the source to access the original metadata of the dataset:
https://devweb.dga.links.com.au/data/dataset/southern-ocean-pinnipeds-provide-bathymetric-insights-on-the-east-antarctic-continental-shelf

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