Australian Tidal Statistics from the EOT20 Model at 1/32 Degree Resolution

Raster tidal statistics for the Australian region at a 1/32 degree resolution derived from the EOT20 global tidal model. The dataset includes rasters for tidal extremes, ranges, percentiles, and monthly climatologies, and includes validation against 70 tide gauges. All products and validation were performed using Python scripts, with source code available for full reproducibility.

Use Cases

• Modeling coastal flooding risk based on tidal range and highest predicted tide statistics.
• Analyzing seasonal tidal patterns using the monthly climatology data for LPT, Mean, and HPT.
• Validating regional tidal models based on the comparison data from 70 Australian tide gauges.
• Mapping nearshore tidal characteristics using the provided percentile rasters for probabilistic analysis.

Strengths

• Spatial resolution of 1/32 degree for detailed regional analysis.
• Includes validation against 70 tide gauges around Australia with 19 years of comparison data.
• Fully reproducible with Python source code available from GitHub.
• Provides multiple tidal metrics including extremes, ranges, percentiles, and monthly climatologies.

Limitations

• Tidal statistics calculated over a 5-year period (2020-2025), not the full 19-year lunar cycle, potentially biasing towards higher ranges.
• Nearshore areas, particularly river mouths and bays, are excluded from the original model and infilled via interpolation, which may increase error.
• The dataset is not validated for use in critical administrative or jurisdictional applications.

Provenance

Source

Australian Ocean Data Network, derived from the EOT20 global tidal model (NESP MaC 3.17, AIMS).

Collection Method

Derived from the EOT20 global tidal model, with statistics calculated using a 30-minute time increment.

Time Range

Primary simulation period 2020-2025; tide gauge comparison covers the last 19 years.

Freshness

Last updated 2026-06-04 19:37:28.946887

Geography

Australian region.