See the data version history.
The data of old versions are available only if the versions are included in Yearly fixed datasets.

 CO₂ _ MKO5026 _ surface - insitu _ NOAA _ ccgg

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-25	0002-5026-1001-01-01-3001 -2025-01-01-0002	The latest version
2024-08-30	0002-5026-1001-01-01-3001 -2024-08-19-0748	Included in Yearly Fixed Dataset 2024
2024-02-27	0002-5026-1001-01-01-3001 -2024-02-20-0949
2023-08-25	0002-5026-1001-01-01-3001 -2023-08-25-0726	Included in Yearly Fixed Dataset 2023