Global Riverine Dissolved Oxygen Dataset harmonized from various sources

The dataset file contains dissolved oxygen data for global rivers, which is obtained by preprocessing and harmonizing data from various global sources mentioned here: 1. Graham, D.J., Bierkens, M.F.P., Jones, E.R. et al. Climate change drives low dissolved oxygen and increased hypoxia rates in rivers worldwide. Nat. Clim. Chang. 15, 1348–1354 (2025). https://doi.org/10.1038/s41558-025-02483-y 2. European Environment Agency. Waterbase – Water Quality ICM. European Environment Agency (2022). https://www.eea.europa.eu/data-and-maps/data/waterbase-water-quality-icm-2 3. Hartmann, J., Lauerwald, R. & Moosdorf, N. A brief overview of the Global River Chemistry Database (GLORICH). Procedia Earth Planet. Sci. 10, 23–27 (2014). https://doi.org/10.1016/j.proeps.2014.08.005 4. Blaszczak, J. R., Koenig, L. E., Mejia, F. H., Gómez-Gener, L., Dutton, C. L., Carter, A. M., Grimm, N. B., Harvey, J. W., Helton, A. M., Cohen, M. J., Anyanwu, E. D., Pokrovsky, O. S., Krickov, I. V., Manasypov, R. M., Vorobyev, S. N. & Serikova, S. Distribution, frequency, and global extent of hypoxia in rivers. U.S. Geol. Surv. Data Release (2021). https://doi.org/10.5066/P99X6SIR 5. Department of Water and Sanitation, South Africa. Research Quality Information Services (RQIS). https://www.dws.gov.za/iwqs/report.aspx (accessed 2026) 6. UNEP GEMS/Water Programme & Federal Institute of Hydrology (BfG). GEMStat: Global Water Quality Database (version 2023). UNEP GEMS/Water Data Centre, Koblenz, Germany. https://gemstat.org/data/ (accessed 2026) 7. National Institute of Water and Atmospheric Research (NIWA). New Zealand Freshwater Quality Monitoring Data (National River Water Quality Network) (version 2023). NIWA, Wellington, New Zealand. https://hydrowebportal.niwa.co.nz/Data/DataSet/ (accessed 2026) 8. Environment and Climate Change Canada (ECCC). National Long-term Water Quality Monitoring Data. Government of Canada. https://catalogue.ec.gc.ca/geonetwork/srv/api/records/67b44816-9764-4609-ace1-68dc1764e9ea (accessed 2026) We wholeheartedly thank Duncan J. Graham, Prof. Marc F.P. Bierkens and Prof. Michelle T.H. van Vliet (Utrecht University, Netherlands) for providing access and invaluable correspondence to the global dissolved oxygen datasets. Usage Note: This repository is provided to support the reproducibility in future research. So, we request that the users should cite all the aforementioned references duly along with the current work to properly use the given dataset.