Australian Coastal Water Biogeochemistry Time Series from Nine Reference Stations

Monthly and three-monthly sampling from 2008-2010 to present across nine Australian coastal sites provides salinity, carbon, alkalinity, oxygen, and nutrient measurements. The dataset includes historical records for three stations dating back to 1944. Seven sites have ongoing sampling, with depths recorded from surface to 105 meters at 10-meter intervals.

Use Cases

• Analyze silicate, ammonium, and phosphate nutrient trends over time at specific stations like Maria Island or Port Hacking.
• Model relationships between salinity, carbon, and oxygen measurements across different depth intervals.
• Compare nitrite/nitrate concentrations across the nine National Reference Station sites to assess regional biogeochemical differences.
• Build time-series forecasts for alkalinity levels using the multi-year, monthly sampling data from ongoing stations.

Strengths

• Data spans nine distinct coastal monitoring sites across Australia.
• Includes long-term historical data for three stations, with records beginning as early as 1944.
• Sampling conducted at standardized 10-meter depth intervals from surface to 105 meters.

Limitations

• Sampling ceased at two sites (Ningaloo and Esperance) in 2013, limiting their temporal coverage.
• Data structure and specific column definitions are not provided in the input, requiring investigation of linked documents.
• Primary data files are in document formats (PDF, DOCX) rather than structured tabular formats, complicating direct analysis.

Provenance

Source

CSIRO Marlin Data Catalogue via the Integrated Marine Observing System (IMOS).

Collection Method

Monthly and three-monthly field sampling from small vessels, with samples analyzed for biogeochemical parameters.

Time Range

2008-2010 to present for ongoing sites; historical data from 1944-2010 for three stations.

Freshness

Ongoing sampling for seven sites; metadata last updated March 2026.

Geography

Nine coastal sites around Australia: Tasmania, South Australia, Western Australia, Northern Territory, Queensland, New South Wales.