Inherent Optical Properties in a Tropical Macrotidal Coastal System

A 2026 study from Geoscience Australia investigates biogeochemical and inherent optical properties (IOPs) in the Fitzroy Estuary and Keppel Bay system. The dataset includes continuous spectral absorption, scattering, and backscattering coefficients, plus discrete measurements of phytoplankton, nonalgal particle, and dissolved organic matter absorption. Sampling occurred spatially and across tidal phases during the dry season in a shallow tropical coastal environment.

Use Cases

• Model remote sensing algorithms using spectral absorption and scattering coefficients adjusted for spatial and tidal variability.
• Analyze the relationship between chlorophyll-specific phytoplankton absorption and phytoplankton pigment concentrations.
• Investigate the impact of semidiurnal tides on the spatial distribution of suspended matter-specific particle scattering.
• Compare particle single scattering albedo and backscattering efficiency across the estuary-to-bay continuum where values vary by a factor of 6.

Strengths

• Includes continuous and discrete measurements of spectral IOPs across multiple water components.
• Captures data across strong spatial gradients, with particle scattering decreasing by 2 orders of magnitude from estuary to bay.
• Sampling design accounts for temporal variability induced by semidiurnal tides during the dry season.

Limitations

• Data is from a single study during the dry season, limiting insight into seasonal or annual cycles.
• Focus is on a specific tropical macrotidal system (Fitzroy Estuary and Keppel Bay), reducing generalizability to other coastal types.
• The dataset is presented as a publication summary; raw tabular data or sample rows are not directly provided.

Provenance

Source

Geoscience Australia Data

Collection Method

Field sampling of near-surface water properties, including continuous IOP measurements and discrete lab analyses.

Time Range

Dry season (specific year not stated).

Freshness

Last updated in March 2026.

Geography

Fitzroy Estuary and Keppel Bay system in tropical Australia (AU-QLD).