SOCAT Version 4

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

Data Access

SOCAT version 4 data products are available in a variety of formats:

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
Synthesis and gridded files

Global and regional synthesis files, as well as gridded files, are available as text files and netcdf, respectively, via the NOAA National Centers for Environmental Information. Matlab code is available for reading these text files.

Synthesis files
All data 2.8 Gb
Arctic Data 149 Mb
Coastal Data 1.1 Gb
Indian Ocean Data 40.1 Mb
North Atlantic Data 262 Mb
North Pacific Data 92 Mb
Southern Ocean Data 762 Mb
Tropical Atlantic Data 124 Mb
Tropical Pacific Data 317 Mb
Flag E Data 167 Mb
Instruction for reading syntesis files
Matlab code for reading syntesis files
159 Kb
19 Kb
Gridded files (only includes fCO₂ _rec)
Monthly gridded 1.3 Gb
Yearly gridded 136 Mb
Decadal gridded 14.8 Mb
Quarter-degree gridded monthly coastal 165 Mb
Matlab code for reading gridded files 7.2 Kb
Individual data sets in text format

Individual data set files are archived in Pangaea and can be downloaded in text format from there.

Download all SOCAT V4 data sets  220 Mb
Metadata overview
List of new and updated data sets
Ocean Data View format

The synthesis and gridded files are available in Ocean Data View (ODV) format from the ODV website.

ODV SOCAT Collection


More description on SOCAT Version 4 can be found in the V4 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 V4 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 V4 we would like to thank all SOCAT data contributors, quality controllers, members of the automation team and meeting participants:

Bakker, Dorothee C E; Pfeil, Benjamin; O’Brien, Kevin M; Currie, Kim I; Jones, Stephen D; Landa, Camilla S; Lauvset, Siv K; Metzl, Nicolas; Munro, David R; Nakaoka, Shin-Ichiro; Olsen, Are; Pierrot, Denis; Saito, Shu; Smith, Karl; Sweeney, Colm; Takahashi, Taro; Wada, Chisato; Wanninkhof, Rik; Alin, Simone R; Becker, Meike; Bellerby, Richard GJ; Borges, Alberto Vieira; Boutin, Jacqueline; Bozec, Yann; Burger, Eugene; Cai, Wei-Jun; Castle, Robert D; Cosca, Catherine E; DeGrandpre, Michael D; Donnelly, Matthew; Eischeid, Greg; Feely, Richard A; Gkritzalis, Thanos; González-Dávila, Melchor; Goyet, Catherine; Guillot, Antoine; Hardman-Mountford, Nicolas; Hauck, Judith; Hoppema, Mario; Humphreys, Matthew P; Hunt, Christopher W; Ibánhez, J Severino P; Ichikawa, Tadafumi; Ishii, Masao; Juranek, Lauren W; Kitidis, Vassilis; Körtzinger, Arne; Koffi, Urbain K; Kozyr, Alexander; Kuwata, Akira; Lefèvre, Nathalie; Lo Monaco, Claire; Manke, Ansley; Marrec, Pierre; Mathis, Jeremy T; Millero, Frank J; Monacci, Natalie; Monteiro, Pedro M S; Murata, Akihiko; Newberger, Timothy; Nojiri, Yukihiro; Nonaka, Isao; Omar, Abdirahman M; Ono, Tsuneo; Padín, Xose Antonio; Rehder, Gregor; Rutgersson, Anna; Sabine, Christopher L; Salisbury, Joe; Santana-Casiano, Juana Magdalena; Sasano, Daisuke; Schuster, Ute; Sieger, Rainer; Skjelvan, Ingunn; Steinhoff, Tobias; Sullivan, Kevin; Sutherland, Stewart C; Sutton, Adrienne; Tadokoro, Kazuaki; Telszewski, Maciej; Thomas, Helmuth; Tilbrook, Bronte; van Heuven, Steven; Vandemark, Doug; Wallace, Douglas WR, and Woosley, Ryan.


SOCAT quality control is carried out by regional working groups with a global group for coordination.
The groups for SOCAT Version 4 can be found here.