Monthly nutrient and chlorophyll a distributions were measured for two years as part of the Port Phillip Bay Environmental Study. Reported data focus on nutrient variation in northern Port Phillip Bay during a high runoff period in September 1993 and a low runoff period in January 1995. The data were collected by the Australian Ocean Data Network using a continuous profiling technique aboard a ship, resolving features over scales of about 200 meters.
Use Cases
- Modeling nutrient source contributions based on ammonium/salinity and silicate/salinity relationships described in the study
- Analyzing spatial variability of phosphate and silicate concentrations during high runoff events
- Comparing biomass abundance supported by freshwater inputs versus internal nutrient recycling as suggested by chlorophyll a data
- Distinguishing between nutrient inputs from the Yarra/Maribyrnong River and Werribee River sources using the provided relationships
Strengths
- High-resolution temporal data collected at monthly intervals over two years
- Fine spatial resolution, with nutrient features resolved over scales of about 200 meters
- Simultaneous collection of hydrographic and chlorophyll a data alongside nutrient measurements
- Explicit concentration ranges provided for ammonium (<0.5-40 mM), oxidised N (<0.2-20 mM), phosphate (<1-8 mM), and silicate (<1-80 mM)
Limitations
- Column-level documentation is absent; field semantics must be inferred after download
- Row count is unknown, which may limit suitability assessment
- Data freshness should be verified; the last update timestamp is 2026-06-23 01:41:44.340186
Provenance
- Source
- Australian Ocean Data Network
- Collection Method
- Nutrients measured via continuous profiling technique aboard a ship, using flow-segmented colorimetric analysis on filtered seawater.
- Time Range
- Includes specific surveys from September 1993 and January 1995, within a two-year monthly sampling period.
- Freshness
- Last updated 2026-06-23 01:41:44.340186
- Geography
- Northern Port Phillip Bay, Victoria, Australia, with specific focus on northern and western perimeters and river sources.