Australian Continental Shelf Bed Shear Stress Exposure Models 1997-2005

Geoscience Australia Data provides model outputs quantifying seabed exposure to oceanographic processes. The dataset covers the entire Australian continental shelf for an 8-year period from March 1997 to February 2005, using three regionalisation methods to classify exposure levels.

Use Cases

• Apply the spectral regionalisation method to map seabed disturbance frequency across the continental shelf.
• Analyze the probability distribution function shape method to characterize the magnitude of extreme combined flow bed shear stress events.
• Use the work-frequency balance method to assess the relationship between stress magnitude and event frequency for benthic habitat classification.
• Correlate regionalisation outputs with physical sediment properties like mean grain size and bulk carbonate content.
• Distinguish between high-frequency (diurnal/semi-diurnal) and low-frequency (synoptic/annual) event regions in exposure analysis.

Strengths

• Covers the entire Australian continental shelf spatially.
• Provides an 8-year temporal record from March 1997 to February 2005.
• Offers three distinct methodological approaches (spectral, PDF shape, work-frequency balance) for exposure classification.

Limitations

• Dataset size, row count, and specific column structure are unknown.
• Data is derived from model outputs, not direct in-situ measurements, introducing potential model bias.
• Temporal coverage ends in 2005, which may not reflect current oceanographic conditions.

Provenance

Source

Geoscience Australia Data

Collection Method

Computed from a suite of numerical models predicting oceanic processes (waves, tidal, wind, and density-driven currents).

Time Range

March 1997 to February 2005

Freshness

null

Geography

Australian continental shelf