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

Nine Australian coastal sites provide data on salinity, carbon, alkalinity, oxygen, and nutrients from water samples. Sampling began between September 2008 and November 2010 and is ongoing for seven sites, with historical data available for three sites dating back to the 1940s. The dataset is managed by the Australian Ocean Data Network as part of the Integrated Marine Observing System.

Use Cases

• Analyze long-term trends in ocean acidification based on carbon and alkalinity measurements.
• Model nutrient cycling in coastal ecosystems based on silicate, ammonium, nitrite/nitrate, and phosphate data.
• Assess seasonal and interannual variability in water quality parameters like salinity and dissolved oxygen.
• Compare biogeochemical conditions across distinct Australian coastal regions mentioned in the description.

Strengths

• Includes data from nine distinct coastal monitoring stations around Australia.
• Provides long-term time-series data, with sampling ongoing since 2008-2010 for most sites.
• Incorporates historical data series for three sites, with records beginning as early as 1944.

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) / Integrated Marine Observing System (IMOS).

Collection Method

Monthly water sampling from small vessels at fixed coastal stations, with analyses conducted in laboratories.

Time Range

2008-09-29 to present (ongoing for 7 sites), with historical data from 1944-2010 for three sites.

Freshness

Last updated 2026-06-27 16:42:42.901263; freshness should be verified.

Geography

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