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

 CH₄ _ USH3007 _ surface - insitu _ SMNA _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2026-06-11	0069-3007-1002-01-01-9999 -2026-06-02-1351	The latest version
2025-07-01	0069-3007-1002-01-01-9999 -2025-06-18-1121	Included in Yearly Fixed Dataset 2025