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

 CO₂ _ TRL7039 _ surface - insitu _ NILU _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2025-05-26	0054-7039-1001-01-01-9999 -2025-05-20-1057	The latest version