Following is a list of key global information products and data sources of dissolved oxygen. Many regional and national data sources and products are not listed explicitly but often provide contributions to the global repositories and products.
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Global Ocean Data Analysis Project (GLODAPv2) |
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World Ocean Atlas 2018 |
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World Ocean Database |
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CLIVAR and Carbon Hydrographic Data Office (CCHDO) |
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Biogeochemical Argo Global Data Assembly Centres |
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OceanSITES Global Data Assembly Centres |
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Ocean gliders oxygen SOP (Lopez-Garcia et al., 2022) should align with metadata requirements described in the documentation ‘Processing Argo oxygen data at the DAC level’ (Thierry et al., 2021b, https://archimer.ifremer.fr/doc/00287/39795). Prior to deployment, all the required metadata should be sent ahead of the mission to the Global Data Assembly Center (GDAC). Before deployment, the glider should be well configured and intermediate parameters (phase measurements) should be sent in real time (RT) as well. This will allow first to check if dissolved oxygen values computed inside the glider are appropriate and allows the dissolved oxygen concentration to be recomputed using any updated method associated with the sensor model, intermediate parameters and calibration coefficients. |
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The Ocean Observatories Initiative (OOI) Biogeochemical (BGC) Sensor Data Best Practices and User Guide available at https://repository.oceanbestpractices.org/handle/11329/2112.2 also provides metadata specifications for both the Fast Response Dissolved oxygen (DOFST, contraction of DO FAST) instrument manufactured by Sea-Bird Electronics, used to measure dissolved oxygen concentration usually on shallow coastal profilers through strong oxygen gradients, and the Stable Dissolved oxygen (DOSTA, contraction of DO STABLE) instrument manufactured by Aanderaa, used on mobile assets, deep profilers, and at fixed-depths on moorings. OOI has been focused on implementing the Gross Range and Climatology tests from Quality Assurance of Real Time Ocean Data (QARTOD) for all sensors. All of OOI data quality control procedures were designed with the goal of meeting the U.S. Integrated Ocean Observing System (IOOS) QARTOD quality control standards. As of March 2023, these tests have been implemented for CTD, pH, and pCO2 sensors, with tests for dissolved oxygen and fluorometric chlorophyll sensors in process. |
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EMODnet Chemistry (https://emodnet.ec.europa.eu/en/chemistry) offers access to dissolved oxygen concentration data within its eutrophication portfolio covering six major European sea regions: the Arctic Ocean (Norwegian Sea including Barents Sea), Baltic Sea, Northeast Atlantic Ocean (Celtic Sea, Iberian coast and Bay of Biscay, and Macaronesia), North Sea, Black Sea, and Mediterranean Sea. EMODnet Chemistry uses SeaDataNet infrastructure (https://www.seadatanet.org/) for its technical set-up and adopts SeaDataNet (SDN) standards for metadata (Schaap et al., 2023, https://doi.org/10.6092/e25b219f-b17d-411e-a0ee-e12db5685e23) and common Vocabularies (i.e. standardised terms that cover a broad spectrum of disciplines) to allow consistency and interoperability (https://www.seadatanet.org/Standards/Common-Vocabularies). |
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The Institute of Atmospheric Physics (IAP, Chinese Academy of Sciences) (Gourteski et al., 2024) (http://www.ocean.iap.ac.cn/) provides global ocean temperature, salinity and oxygen in situ data before and after quality-control and bias-corrections. The data are sourced from WOD and other private data providers. The gridded analysis and time series for climate indicators are also available. IAP dataset includes a set of oxygen metadata (location, date and time, type of sensor, model, adjustment/calibration, country, institute, platform (ID for instrument, ship name), and T/S if possible, which align well with those we adopted from the SDG 14.3.1 metadata sheet. |
