IMOS National Reference Station (NRS) - Salinity, Carbon, Alkalinity, Oxygen and Nutrients

Integrated Marine Observing Systems (IMOS) data includes salinity, carbon, alkalinity, oxygen, and nutrient levels from water samples collected at nine National Reference Station sites around Australia. Sampling began between September 2008 and November 2010 and is ongoing for seven sites, with monthly collection from small vessels. The dataset incorporates historical coastal monitoring data from CSIRO for three sites, with records dating back to 1944.

Use Cases

• Modeling coastal carbon cycles based on alkalinity and carbon measurements
• Analyzing long-term nutrient trends (silicate, ammonium, nitrate, phosphate) in Australian waters
• Studying dissolved oxygen dynamics and potential deoxygenation events
• Assessing water mass properties and variability using salinity data across multiple sites

Strengths

• Data spans nine distinct coastal sites around Australia, providing geographic breadth
• Includes historical data from CSIRO for three sites, with some records starting in the 1940s
• Sampling is described as monthly and ongoing for seven sites, suggesting temporal continuity

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Sampling ceased at two sites (Ningaloo and Esperance) in 2013, creating temporal gaps

Provenance

Source

Australian Ocean Data Network (AODN) via the Integrated Marine Observing Systems (IMOS) National Mooring Network

Collection Method

Water samples collected monthly from small vessels at fixed stations and analyzed in a laboratory.

Time Range

Primary sampling from 2008-2010 onward, with historical data from 1944-2010 for three sites.

Freshness

Last updated 2026-06-04 07:05:12.138169; freshness should be verified

Geography

Nine coastal sites 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).