Australian Coastal Water Biogeochemical Measurements from Reference Stations

IMOS National Reference Station data contains analyzed measurements of salinity, carbon, alkalinity, oxygen, and nutrients from nine coastal sites around Australia. Sampling began between September 2008 and November 2010, with ongoing monthly collection at seven stations as of the last update. The dataset is managed by the Australian Ocean Data Network and includes historical data from CSIRO coastal monitoring programs dating back to 1944 for some locations.

Use Cases

• Analyze long-term trends in nutrient concentrations like silicate, ammonium, and phosphate across nine Australian coastal stations.
• Model relationships between salinity, oxygen, and carbon parameters to study coastal ocean acidification and deoxygenation.
• Compare biogeochemical time-series data from stations like Maria Island and Port Hacking with historical CSIRO coastal monitoring records.
• Assess spatial variability in water quality by correlating nitrate/nitrite levels with geographic features of the sampling sites.

Strengths

• Data collection spans nine distinct coastal reference stations around Australia, providing geographic diversity.
• Includes historical data from CSIRO programs, with some time-series extending back to 1944, 1951, and 1953 for specific sites.
• Sampling follows a documented operational manual, suggesting standardized collection and analysis procedures.

Limitations

• Sampling ceased at two sites (Ningaloo and Esperance) in 2013, creating incomplete time-series for those locations.
• The dataset has been superseded by a newer combined collection, indicating it may not be the most current version available.
• Specific row counts, column details, and data formats (PDF, PUB, HTML) are not provided, limiting initial assessment of structure.

Provenance

Source

Integrated Marine Observing System (IMOS) National Mooring Network and historical CSIRO Coastal Monitoring program.

Collection Method

Monthly (or 3-monthly) sampling off small vessels, with laboratory analysis of water samples for biogeochemical parameters.

Time Range

Ongoing sampling from 2008-2010 onwards, with historical data from 1944-2010 for specific stations.

Freshness

Data collection is described as ongoing for seven sites, with a platform last updated date of April 2026.

Geography

Nine coastal stations around Australia: Maria Island (TAS), Kangaroo Island (SA), Esperance (WA), Rottnest Island (WA), Ningaloo (WA), Darwin (NT), Yongala (QLD), North Stradbroke Island (QLD), Port Hacking (NSW).