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

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

Use Cases

• Reconstructing past glacier extent and retreat based on mapped mega-scale glacial lineations and grounding zone wedges.
• Modeling historical ice-ocean interactions using the recorded seabed topography and subglacial basins.
• Informing contemporary ice sheet models and future projections by extending the record of past glacier changes.
• Analyzing iceberg distribution and dynamics from the recorded iceberg scours on the continental shelf.

Strengths

• Contains over 10,000 nautical miles of new hydroacoustic data (multibeam and sub-bottom profiles).
• Covers a specific target area off the East Antarctic ice margin between 85° E and 115° E.
• Reveals a variety of specific glacial features, including iceberg scours and subglacial basins.

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 machine-readability.

Provenance

Source

Geoscience Australia Data

Collection Method

Collected via RV Polarstern Expedition PS141 using hydroacoustic systems (multibeam and sub-bottom profilers).

Time Range

Data collected from 6 February to 14 April 2024.

Freshness

Last updated 2026-04-30 12:36:17.974356; freshness should be verified.

Geography

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