Australian Coastal Water Biogeochemical Measurements from Nine Reference Stations

Aggregating biogeochemical measurements including salinity, carbon, alkalinity, oxygen, and nutrients (silicate, ammonium, nitrite/nitrate, phosphate) from nine coastal reference stations around Australia. Sampling began between September 2008 and November 2010 and is ongoing for seven sites, with two sites ceasing in 2013. Data is collected monthly from small vessels.

Use Cases

• Analyze long-term trends in silicate, ammonium, and phosphate concentrations to assess coastal nutrient cycling across the nine Australian stations.
• Model relationships between salinity, oxygen, and carbon parameters to study coastal water mass properties and biogeochemical processes.
• Compare nitrite/nitrate levels across different geographic regions like the Tasman Sea, Coral Sea, and Indian Ocean using station location data.
• Investigate seasonal or interannual variability in alkalinity and nutrient data from the multi-year monthly sampling regime.

Strengths

• Data originates from nine established National Reference Stations providing standardized coastal monitoring.
• Includes historical data extending back to 1944 for three stations (Maria Island, Port Hacking, Rottnest Island).
• Sampling is conducted monthly, offering a consistent temporal resolution for time-series analysis at most sites.

Limitations

• The dataset has been superseded by a newer combined collection, indicating this version may not be the most current or complete.
• Sampling frequency was lower (3-monthly) at the Esperance and Ningaloo sites, and sampling ceased at these two sites in 2013.
• Available file formats (HTML, PDF, PUB) are not ideal for direct computational analysis and may require significant data extraction effort.

Provenance

Source

Integrated Marine Observing Systems (IMOS) National Mooring Network - National Reference Station (NRS) field sampling.

Collection Method

Samples collected monthly from small vessels and analyzed for biogeochemical parameters.

Time Range

Sampling began 2008-2010 and is ongoing; includes historical data from 1944 for some stations.

Freshness

Sampling is described as ongoing for seven sites; metadata was last updated in March 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).