Isostatic Model Admittance Functions for Gravity and Topography

Spectral representations of isostatic models describe the relationship between gravity anomalies and topography using mathematical filters known as admittance functions. The Australian Ocean Data Network provides this theoretical exposition, which was last updated in April 2026. It details the construction of these filters via Green's equivalent layer theorem for rheologies like elastic and visco-elastic lithospheres.

Use Cases

• Modeling free-air gravity anomalies from topography using admittance functions for elastic rheology.
• Comparing computational efficiency of spectral filter methods versus line-integral methods for isostatic schemes.
• Analyzing the control of lithospheric rheology on isostatic compensation processes via visco-elastic admittance functions.
• Applying Green's equivalent layer theorem to construct mathematical filters for gravity-topography cross-spectral analysis.

Strengths

• Documentation provides a detailed theoretical foundation for a specialized geophysical method.
• Content covers multiple lithospheric rheology models, specifically elastic and visco-elastic.

Limitations

• Dataset consists of theoretical documentation (PDF/HTML) with no accompanying numerical data, tables, or code.
• No sample data, row counts, or specific geographic case studies are provided for validation.

Provenance

Source

Australian Ocean Data Network via data.gov.au.

Collection Method

Theoretical exposition and mathematical derivation.

Time Range

null

Freshness

null

Geography

null