SOCAT data are released in versions. Each succeeding version contains new data sets as well as updates of older ones. The first version of SOCAT was released in 2011, the second and third version followed biennially. Automation allowed annual public releases since version 4. The latest SOCAT version is v2023.
| Release Year | # fCO₂ values (millions) | Time span | ||
| v2026 | Data Access | 2026 | 44 | 1957-2025 |
| v2025 | Data Access | 2025 | 41.4 | 1957-2024 |
| v2024 | Data Access | 2024 | 38.6 | 1957-2023 |
| v2023 | Data Access | 2023 | 35.6 | 1957-2022 |
| v2022 | Data Access | 2022 | 33.7 | 1957-2021 |
| v2021 | Data Access | 2021 | 30.6 | 1957-2020 |
| v2020 | Data Access | 2020 | 28.2 | 1957-2019 |
| v2019 | Data Access | 2019 | 25.7 | 1957-2018 |
| Version 6 | Data Access | 2018 | 23.4 | 1957-2017 |
| Version 5 | Data Access | 2017 | 21.5 | 1957-2016 |
| Version 4 | Data Access | 2016 | 18.5 | 1957-2015 |
| Version 3 | Data Access | 2015 | 14.5 | 1957-2014 |
| Version 2 | Data Access | 2013 | 10.1 | 1968-2011 |
| Version 1.5 | Data Access | 2011 | 6.3 | 1968-2007 |
The content below brings together the various code versions and documents their compatibility with historical SOCAT releases. A code version may appear under several release years because only the accompanying documentation, comments, titles, or dates were updated, while the executable code itself remained identical and produced the same results. The original code releases and accompanying instructions can still be accessed through the detailed version records.
Latest versions of all codes are in bold – to be used with the latest release
Detailed/original versions : Previous Versions
Synthesis Products – Instructions (PDF)
| Documents | Published alongside SOCAT : |
| Instructions v1 | v1 |
| Instructions v2 | v2 |
| Instructions v3 | v3-v2019 |
| Instructions v4 | v2020-v2026 |
| Instructions v5 | v2025-v2026 |
Synthesis Products – Matlab Code
| Documents | Published alongside : |
| Matlab code 1 | v1 |
| Matlab code 2 | v2 |
| Matlab code 3 | v3-v2019 |
| Matlab code 4 | v2020-v2022 |
| Matlab code 5 (regional files only) | v2023-v2026 |
| Matlab code 6 | v2025-v2026 |
Gridded Products – Matlab Code
| Documents | Published alongside : |
| Matlab code 1 | v6-v2019 |
| Matlab code 2 | v2020-2023 |
| Matlab code 3 | v2024-v2026 |
| Matlab code 4 | v2026 |