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

Preliminary bathymetric and geomorphic mapping results from the RV Polarstern expedition PS141 (EASI-3) in 2024. The dataset includes over 10,000 nautical miles of hydroacoustic data from the Davis and Mawson Seas, revealing submerged glacial features. It was prepared by Geoscience Australia for the Australian Antarctic Research Conference in November 2024.

Use Cases

• Map past ice sheet grounding lines based on identified grounding zone wedges.
• Analyze iceberg distribution and dynamics based on recorded iceberg scours.
• Reconstruct paleo-ice flow patterns based on mega-scale glacial lineations.
• Model ocean-ice sheet interactions based on seabed topography and subglacial basins.

Strengths

• Data collection covers over 10,000 nautical miles of hydroacoustic surveys.
• Focuses on the vulnerable Aurora subglacial basin and Shackleton Ice Shelf region.
• Identifies specific glacial features like iceberg scours and grounding zone wedges.

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

Geoscience Australia Data

Collection Method

Hydroacoustic data (multibeam and sub-bottom profiles) collected during RV Polarstern expedition PS141.

Time Range

Expedition conducted from 6 February to 14 April 2024.

Freshness

Last updated 2026-03-25 17:30:24.082883; freshness should be verified.

Geography

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