PS141 EASI-3: Seabed Glacial Geomorphology Features from the East Antarctic 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. More than 10,000 nautical miles of new hydroacoustic data were collected in the Davis and Mawson Seas.

Use Cases

• Model past ice sheet retreat patterns based on mapped mega-scale glacial lineations.
• Analyze the history of iceberg calving and drift based on the distribution of iceberg scours.
• Reconstruct past grounding line positions based on the location of grounding zone wedges.
• Inform contemporary ice sheet models based on the record of past glacier changes.

Strengths

• More than 10,000 nautical miles of newly collected hydroacoustic data.
• Covers a target area between 85° E and 115° E longitude off the East Antarctic margin.
• Presents preliminary mapping of specific glacial features like iceberg scours and subglacial basins.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is presented in PDF format, which may limit direct computational analysis.
• Row count and dataset scale are unknown, which may limit suitability assessment.

Provenance

Source

Geoscience Australia Data

Collection Method

Collected via continuous multibeam and sub-bottom profiling during RV Polarstern expedition PS141.

Time Range

Data collected from 6 February to 14 April 2024.

Freshness

Last updated 2026-04-20 03:25:44.944462; freshness should be verified.

Geography

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