Topographic Controls on Post-Oligocene Antarctic Ice-Sheet Dynamics

Topographic Controls on Post-Oligocene Changes in Ice-sheet Dynamics, Prydz Bay Region, East Antarctica is a dataset from the Australian Ocean Data Network. It contains results from ice-sheet numerical modeling investigating how bed morphology in the Lambert graben and Prydz Bay controlled ice-sheet extent and flow dynamics over geological time. The data suggests a negative feedback where erosion has overdeepened the graben, making shelf-edge glaciation impossible even under Last Glacial Maximum conditions.

Use Cases

• Modeling ice-sheet response to bed morphology based on topographic and bathymetric controls.
• Reconstructing sedimentation history by correlating bathymetric volume changes with fan sedimentation records.
• Analyzing the feedback between glacial erosion and future ice-sheet extent in the Lambert-Amery system.
• Studying the transition from ice-cliff to ice-stream dynamics during the Miocene Epoch.

Strengths

• Cross-platform presence on data.gov.au indicates established importance and curation.
• Focus on a specific, critical region (Lambert-Amery system, Prydz Bay) for understanding East Antarctic Ice Sheet evolution.
• Integrates geological data with numerical modeling to address gaps in the sedimentary record.

Limitations

• Critical metadata is missing: column names, row count, file size, and license are not provided.
• The dataset's structure and accessible data formats (beyond HTML) are unclear from the descriptions.
• Conflicting 'last updated' dates (2026-06-16 and 2026-05-05) create uncertainty about versioning.

Provenance

Source

Australian Ocean Data Network

Collection Method

Likely derived from ice-sheet numerical modeling informed by geological and bathymetric data.

Time Range

Oligocene Epoch to present, with focus on Miocene and Pliocene-Pleistocene.

Freshness

Last updated: 2026-06-16 23:51:26.394064

Geography

Prydz Bay region and Lambert graben, East Antarctica.