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

Preliminary seabed 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 by the Australian Ocean Data Network for the Australian Antarctic Research Conference in November 2024.

Use Cases

• Reconstruct past glacier and ice sheet changes based on identified seabed features like mega-scale glacial lineations.
• Inform contemporary ice sheet models and future projections based on the record of past ocean-ice sheet interactions.
• Analyze the interplay between seabed topography and oceanic processes in vulnerable regions like the Aurora subglacial basin.

Strengths

• Contains more than 10,000 nautical miles of newly collected hydroacoustic data.
• Focuses on a target area off the ice margin between 85° E and 115° E, a region relevant for ice sheet instability studies.

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.

Provenance

Source

Australian Ocean Data Network

Collection Method

Hydroacoustic data collection (continuous multibeam and sub-bottom profiles) from RV Polarstern expedition PS141.

Time Range

Expedition conducted from 6 February to 14 April 2024.

Freshness

Last updated 2026-06-04 07:09:22.964332; freshness should be verified.

Geography

Davis and Mawson Seas, East Antarctic continental shelf between Wilhelm II to Wilkes Land (85° E to 115° E).