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

 CO₂ _ USH3007 _ surface - insitu _ SMNA _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2025-07-01	0069-3007-1001-01-01-9999 -2025-06-18-1121	The latest version