IMOS - Argo Profiles - biogeochemical data

• Other Authors: AODN Data Manager (distributor), CSIRO Oceans and Atmosphere - Hobart (hasAssociationWith), Data Officer (distributor), Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) (hasAssociationWith), Integrated Marine Observing System (IMOS) (resourceProvider), Strutton, Pete (hasPrincipalInvestigator), Strutton, Peter (hasPrincipalInvestigator), Strutton, Peter, Assoc/Prof (hasPrincipalInvestigator), Trull, Tom W. (hasPrincipalInvestigator)
• Format: Dataset
• Language: unknown
• Published: Integrated Marine Observing System
• Subjects: oceans; CHLOROPHYLL; EARTH SCIENCE; OCEAN CHEMISTRY; WATER PRESSURE; OCEAN PRESSURE; NITRATE; PH; OXYGEN; Profiling Float | Autonomous Profiling Float; IMOS Node | Bluewater and Climate; Global / Oceans | Atlantic Ocean; Global / Oceans | Southern Ocean; Regional Seas | Arabian Sea; Regional Seas | Mediterranean Sea; Global / Oceans | Indian Ocean; Marine Features (Australia) | Great Australian Bight; SA/WA; Regional Seas | Tasman Sea; Regional Seas | Coral Sea; Regional Seas | Red Sea; Marine Features (Global) | Bay of Bengal; Regional Seas | Timor Sea; Global / Oceans | Pacific Ocean; Regional Seas | Philippine Sea; drifting subsurface profiling float; Pressure (measured variable) in the water body exerted by overlying sea water and any medium above it; Concentration of inferred chlorophyll from relative fluorescence per unit volume of the water body; Concentration of oxygen {O2} per unit mass of the water body; pH (total scale) of the water body; Concentration of nitrate {NO3} per unit mass of the water body; dissolved gas sensors; radiometers; water biogeochemical sensor; Biogeochemical Argo Sub-Facility; Integrated Marine Observing System (IMOS); Southern Ocean; Pacific; Indian
• Online Access: https://researchdata.edu.au/imos-argo-profiles-biogeochemical-data/1714701

Statement: The BGC-Argo data system has three levels of quality control. The first level is the real-time system that performs a set of agreed, automated checks on all float measurements. The real time quality control procedures are described in the Argo Quality Control Manual for Biogeochemical Data (http://dx.doi.org/10.13155/40879). Quality flags are: 0 - no quality control done; 1 - good data; 2 - probably good data; 3 - bad data that are potentially correctable 4 - bad data that is not correctable. A second level of data improvement called an adjustment (leading to "adjusted-mode" data) is applied for 4 out of the 6 standard BGC variables: oxygen, nitrate, pH and chlorophyll. For these 4 variables, only adjusted data should be used (found in the xy_ADJUSTED variable) as the adjustment corrects for drifts and offsets of the sensors relative to their factory calibrations. Adjustments can be made in real time once an operator has generated the appropriate coefficients, so adjusted variables can be present in real-time files. For the 4 variables indicated, only adjusted data are ready for operational use (https://doi.org/10.3389/fmars.2019.00502). Optical backscattering and radiometry data can usually be used "as is". A third level of quality control is done in delayed mode, after the profiles are more than 6 months old. The data undergo rigorous semi-automated and manual tests and are inspected by an operator; adjusted data may be updated at this stage, and the QC refined. Delayed-mode QC usually begins 6-12 months into a float's life. Sensor-specific QC procedures for BGC-Argo can be found on the BGC-Argo data management website: https://biogeochemical-argo.org/data-management.php. Credit Australia's Integrated Marine Observing System (IMOS) is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent. Credit CSIRO Oceans & Atmosphere Credit Marine ...