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

 CO₂ _ ZOS7023 _ surface - insitu _ CAMS _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2026-08-21	0177-7023-1001-01-01-9999 -2026-08-18-0739	The latest version