PS141 EASI-3: Seabed Glacial Geomorphology Features from East Antarctic Continental Shelf

Preliminary bathymetric and geomorphic mapping results from the RV Polarstern Expedition PS141 (EASI-3) in 2024. The dataset reveals submerged glacial features on the East Antarctic continental shelf, including iceberg scours and grounding zone wedges. It was prepared for the Australian Antarctic Research Conference in November 2024.

Use Cases

• Modeling past ice sheet retreat patterns based on identified mega-scale glacial lineations.
• Reconstructing paleo-ice flow directions based on seabed geomorphic features.
• Informing contemporary ice sheet models based on records of past grounding zone positions.
• Analyzing the interaction between seabed topography and ocean circulation based on bathymetric data.

Strengths

• Contains more than 10,000 nautical miles of new hydroacoustic data.
• Focuses on a target area off a vulnerable ice margin (Aurora subglacial basin and Shackleton Ice Shelf).
• Data collected during a dedicated scientific expedition (PS141, 6 Feb to 14 April 2024).

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data is presented as preliminary results in a PDF format, which may limit direct analysis.

Provenance

Source

Australian Ocean Data Network

Collection Method

Hydroacoustic data collection (multibeam and sub-bottom profiles) from RV Polarstern expedition.

Time Range

Data collected from 6 February to 14 April 2024.

Freshness

Last updated 2026-04-10 21:31:58.625795; freshness should be verified.

Geography

Davis and Mawson Seas, East Antarctic margin between 85° E and 115° E.