SOCAT Version 2023

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

Data Access

SOCAT version 2023 data products (DOI: 10.25921/r7xa-bt92) are available in a variety of formats. Please provide feedback about issues (data usage or updated data submissions of existing data) to

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.

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 7.2 Gb 1.2 Gb
Arctic 436 Mb 65 Mb
Coastal 3.5 Gb 586 Mb
Indian Ocean 66 Mb 9 Mb
North Atlantic 512 Mb 90 Mb
North Pacific 225 Mb 40 Mb
Southern Oceans 1.6 Gb 264 Mb
Tropical Atlantic 292 Mb 50 Mb
Tropical Pacific 685 Mb 115 Mb
Flag E 1.3 Gb 211 Mb
Instructions for reading synthesis files  
Matlab code for reading synthesis files (ZIPped)  
Gridded files Main source (NCEI) GEOMAR Mirror (Zipped)
Monthly (nc) 3.7 Gb 36 Mb
Monthly (csv) 43 Mb 13 Mb
Yearly (nc) 214 Mb 10 Mb
Yearly (csv) 23 Mb 7 Mb
Decadal (nc) 24 Mb 4 Mb
Decadal (csv) 9 Mb 3 Mb
Quarter-degree monthly coastal (nc) 389 Mb 150 Mb
Quarter-degree monthly coastal (csv) 106 Mb 36 Mb
Matlab code for reading gridded files (ZIPped) 3 Kb
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.


Further details on on SOCAT version 2023 can be found in the version 2023 release poster.
For a detailed description of data products, file formats and tools, see:

Bakker et al. (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
Bakker et al. (2014) An update to the Surface Ocean CO₂ Atlas (SOCAT version 2). Earth System Science Data 6: 69-90. doi:10.5194/essd-6-69-2014
Pfeil et al. (2013) A uniform, quality controlled Surface Ocean CO₂ Atlas (SOCAT), Earth Syst. Sci. Data, 5, 125-143. doi:10.5194/essd-5-125-2013
Sabine et al. (2013) Surface Ocean CO2 Atlas (SOCAT) gridded data products. Earth System Science Data 5: 145-153. doi:10.5194/essd-5-145-2013


Recalculation in SOCAT version 2023 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.


For SOCAT version 2023 we would like to thank all SOCAT data contributors, quality controllers, and members of the automation team:

Bakker, Dorothee, C.E.; Alin, Simone, R.; Bates, Nicholas, R.; Becker, Meike; Feely, Richard, A.; Gkritzalis, Thanos; Jones, Steve D.; Kozyr, Alex; Lauvset, Siv, K.; Munro, David, R.; Nakaoka, Shin‑Ichiro; Nojiri, Yukihiro; O’Brien, Kevin, M.; Olsen, Are; Pierrot, Denis; Rehder, Gregor; Steinhoff, Tobias; Sutton, Adrienne; Sweeney, Colm; Tilbrook, Bronte; Wada, Chisato; Wanninkhof, Rik; Akl, John; Barbero, Leticia; Beatty, Cory; Berghoff, Carla F.; Bittig, Henry; Bott, Randy; Burger, Eugene; Cai, Wei Jun; Castaño Primo, Rocío; Corredor, Jorge; Cronin, Margot; DeCarlo, Eric; DeGrandpre, Michael D.; Dietrich, Colin; Drennan, William M.; Emerson, Steven; Enochs, Ian; Enyo, Kazutaka; Epherra, Lucía ; Evans, Wiley; Fiedler, Björn; Fontela, Marcos; Frangoulis, Constantin; Gehrung, Martina; Giannoudi, Louisa; Glockzin, Michael; Hales, Burke; Howden, Stephan; Ibánhez, Severino; Kamb, Linus; Körtzinger, Arne; Lefèvre, Nathalie; Lo Monaco, Claire; Lutz, Vivian; Macovei, Vlad; Maenner, Stacy M.; Manalang, Dana; Manzello, Derek; Metzl, Nicolas; Mickett, John; Millero, Frank; Monacci, Natalie; Morell, Julio M.; Musielewicz, Sylvia; Neill, Craig; Newberger, Timothy; Newton, Jan A.; Noakes, Scott; Ólafsdóttir, Sólveig Rósa; Ono, Tsuneo; Osborne, John; Padin, X. Antonio; Paulsen, Melf; Perivoliotis, Leonidas; Petersen, Wilhelm; Petihakis, George; Plueddemann, Albert J.; Rodriguez, Carmen; Rutgersson, Anna; Sabine, Christopher L.; Salisbury, Joe; Schlitzer, Reiner; Skjelvan, Ingunn; Stamataki, Natalia; Sullivan, Kevin; Sutherland, Stewart C.; T’Jampens, Michiel; Tadokoro, Kazuaki; Tanhua, Toste; Telszewski, Maciej; Theetaert, Hannelore; Tomlinson, Michael; Vandemark, Doug; Velo, Antón; Voynova, Yoana; Weller, Robert A.; Whitehead, Chris; Wimart‑Rousseau, Cathy


SOCAT quality control is carried out by regional working groups with a global group for coordination. The groups for SOCAT version 2023 can be found here.