SOCAT Version 2026

Before using SOCAT data products, please read the Data Use Statement

Data Access

SOCAT version 2026 data products (DOI : 10.25921/8dba-fr90) are available in a variety of formats. Please provide feedback about issues (data usage or updated data submissions of existing data).

	Interactive viewers Use the Interactive Viewers from the Live Access Server to explore and download gridded or non-gridded data following selected criteria (region, year, platform, etc.). Making maps and property plots is straight forward and a good way to to get a quick overview of the data collection. Interactive Data Set Viewer Interactive Gridded Data Viewer
	ERDDAP™ Complete and Decimated versions of SOCAT from Version 3 onwards are available via ERDDAP™: SOCAT ERDDAP
	Synthesis and gridded files Global and regional synthesis files, as well as gridded files, are available as text files and netcdf, respectively, via the OCADS Metadata Page at the National Centers for Environmental Information. Matlab code is available for reading these text files. Synthesis files Main source (NCEI) GEOMAR Mirror (Zipped) All 1.4 Gb (.zip) Coming soon Arctic 534 Mb Coming soon Coastal 3.8 Gb Coming soon Indian Ocean 74 Mb Coming soon North Atlantic 567 Mb Coming soon North Pacific 313 Mb Coming soon Southern Ocean 1.9 Gb Coming soon Tropical Atlantic 318 Mb Coming soon Tropical Pacific 870 Mb Coming soon Flag E 1.5 Gb Coming soon Instructions for reading synthesis files     Gridded files Main source (NCEI) GEOMAR Mirror (Zipped) Monthly (nc) 3.9 Gb Coming soon Monthly (csv) 48 Mb Coming soon Yearly (nc) 222 Mb Coming soon Yearly (csv) 25 Mb Coming soon Decadal (nc) 24 Mb Coming soon Decadal (csv) 9.9 Mb Coming soon Quarter-degree monthly coastal (nc) 419 Mb Coming soon Quarter-degree monthly coastal (csv) 122 Mb Coming soon Matlab code for reading gridded files (Zipped)
	Ocean Data View format The synthesis and gridded files are available in Ocean Data View (ODV) format from the ODV website. Users can also explore the data online at webODV. ODV SOCAT Collection

Description

Further details on SOCAT version 2026 can be found in the version 2025 release poster.
For a detailed description of data products, file formats and tools, see:

Recalculation

Recalculation in SOCAT version 2025 took place using Ferret scripts, based on Matlab codes by Are Olsen (University of Bergen/Bjerknes Centre for Climate Research). The Matlab codes can be obtained here.

Citation

Please find below the citation to be used in any publication using our products. For full details, please visit the following page : How to cite SOCAT ?

Dataset
Bakker, D. C. E., Alin, S. R., Bates, N. R., Ehmen, T., Gkritzalis, T., Jones, S. D., Kamb, L., Kozyr, A., Lauvset, S. K., Macovei, V. A., Metzl, N., Nakaoka, S.-i., O’Brien, K. M., Olsen, A., Pierrot, D., Poelmans, S., Steinhoff, T., Sutton, A. J., Sweeney, C., Takao, S., Telszewski, M., Theetaert, H., Tilbrook, B., Wada, C., Wanninkhof, R., Akl, J., Aramaki, T., Arbilla, L. A., Àvila, R. A., Baier, B. C., Barbero, L., Battisti, R., Beatty, C. M., Becker, H., Benoit-Cattin, A., Berghoff, C. F., Bittig, H. C., Bonin, J. A., Bozzano, R., Burger, E. F., Cai, W.-J., Cantoni, C., Castelli, G., Castro, A., Chambers, D. P., Chierici, M., Cronin, M., Cubiella, Á. H., Curbelo, D., Curless, S. E., Czyz, C., Diverrès, D., Dougherty, S., Enochs, I., Enright, M. P., Enyo, K., Evans, W., Feely, R. A., Flohr, A., Fragiacomo, E., Frangoulis, C., Fransson, A., Gehrung, M., Glockzin, M., González, A. G., González-Dávila, M., González-Santana, D., Hales, B., Hamnca, S., Hartman, S. E., Hermes, R., Herndon, J., Hoppema, M., Howard, E., Huertas, E., Kerr, R., Kristensen, T. O., Landschützer, P., Lee, C. M., Lee, H., Lefèvre, N., Leseurre, C., Lo Monaco, C., Luchetta, A., Maenner Jones, S. M., Manalang, D., McAuliffe, A. M., Mdokwana, B. W., Monacci, N. M., Monteiro, P. M. S., Morell, J. M., Munro, D. R., Neill, C., Newberger, T., Nickford, S., Nillson, E., Noakes, S., Noh, J.-H., Noisel, C., O’Brien, C., Olivier, L., Omar, A., Orselli, I., Padin, A., Pena, L. D., Pensieri, S., Pryterch, J., Rehder, G., Rutgersson, A., Sabine, C. L., Sallée, J.-B., Sanders, R., Santana-Casiano, J. M., Sarpe, D., Schirnik, C., Schlitzer, R., Shadwick, E., Skjelvan, I., T’Jampens, M., Tamsitt, V., Toledo Aboy, A. E., Tovar-Sanchez, A., Tsanwani, M., Van de Velde, S., Van Ooijen, E., Vandemark, D., Veccia, M. H., Voynova, Y. G., Williams, N. L., Xu, Y. (2026). Surface Ocean CO₂ Atlas Database Version 2026 (SOCATv2026) (NCEI Accession 0315110). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/8dba-fr90

Methods Paper
Bakker, D. C. E., Pfeil, B. Landa, C. S., Metzl, N., O’Brien, K. M., Olsen, A., Smith, K., Cosca, C., Harasawa, S., Jones, S. D., Nakaoka, S., Nojiri, Y., Schuster, U., Steinhoff, T., Sweeney, C., Takahashi, T., Tilbrook, B., Wada, C., Wanninkhof, R., Alin, S. R., Balestrini, C. F., Barbero, L., Bates, N. R., Bianchi, A. A., Bonou, F., Boutin, J., Bozec, Y., Burger, E. F., Cai, W.-J., Castle, R. D., Chen, L., Chierici, M., Currie, K., Evans, W., Featherstone, C., Feely, R. A., Fransson, A., Goyet, C., Greenwood, N., Gregor, L., Hankin, S., Hardman-Mountford, N. J., Harlay, J., Hauck, J., Hoppema, M., Humphreys, M. P., Hunt, C. W., Huss, B., Ibánhez, J. S. P., Johannessen, T., Keeling, R., Kitidis, V., Körtzinger, A., Kozyr, A., Krasakopoulou, E., Kuwata, A., Landschützer, P., Lauvset, S. K., Lefèvre, N., Lo Monaco, C., Manke, A., Mathis, J. T., Merlivat, L., Millero, F. J., Monteiro, P. M. S., Munro, D. R., Murata, A., Newberger, T., Omar, A. M., Ono, T., Paterson, K., Pearce, D., Pierrot, D., Robbins, L. L., Saito, S., Salisbury, J., Schlitzer, R., Schneider, B., Schweitzer, R., Sieger, R., Skjelvan, I., Sullivan, K. F., Sutherland, S. C., Sutton, A. J., Tadokoro, K., Telszewski, M., Tuma, M., Van Heuven, S. M. A. C., Vandemark, D., Ward, B., Watson, A. J., Xu, S. (2016) A multi-decade record of high quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT). Earth System Science Data 8: 383-413. doi:10.5194/essd-8-383-2016.

Gridded Products Paper
Sabine, C. L., Hankin, S., Koyuk, H., Bakker, D. C. E., Pfeil, B., Olsen, A., Metzl, N., Kozyr, A., Fassbender, A., Manke, A., Malczyk, J., Akl, J., Alin, S. R., Bellerby, R. G. J., Borges, A., Boutin, J., Brown, P. J., Cai, W.-J., Chavez, F. P., Chen, A., Cosca, C., Feely, R. A., González-Dávila, M., Goyet, C., Hardman-Mountford, N., Heinze, C., Hoppema, M., Hunt, C. W., Hydes, D., Ishii, M., Johannessen, T., Key, R. M., Körtzinger, A., Landschützer, P., Lauvset, S. K., Lefèvre, N., Lenton, A., Lourantou, A., Merlivat, L., Midorikawa, T., Mintrop, L., Miyazaki, C., Murata, A., Nakadate, A., Nakano, Y., Nakaoka, S., Nojiri, Y., Omar, A. M., Padin, X. A., Park, G.-H., Paterson, K., Perez, F. F., Pierrot, D., Poisson, A., Ríos, A. F., Salisbury, J., Santana-Casiano, J. M., Sarma, V. V. S. S., Schlitzer, R., Schneider, B., Schuster, U., Sieger, R., Skjelvan, I., Steinhoff, T., Suzuki, T., Takahashi, T., Tedesco, K., Telszewski, M., Thomas, H., Tilbrook, B., Vandemark, D., Veness, T., Watson, A. J., Weiss, R., Wong, C. S., and Yoshikawa-Inoue, H. (2013) Surface Ocean CO2 Atlas (SOCAT) gridded data products, Earth Syst. Sci. Data, 5, 145-153. doi:10.5194/essd-5-145-2013.

Acknowledgements
The Surface Ocean CO2 Atlas (SOCAT) is an international effort, endorsed by the SCOR Infrastructural Project International Ocean Carbon Coordination Project (IOCCP) and the Surface Ocean Lower-Atmosphere Study (SOLAS), to deliver a uniform, quality-controlled surface ocean CO2 database. The many researchers and funding agencies responsible for the collection of data and quality control are thanked for their contributions to SOCAT.

Groups

SOCAT quality control is carried out by regional working groups with a global group for coordination. The groups for SOCAT version 2026 can be found here.