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

 CH₄ _ MKO5026 _ surface - insitu _ NOAA _ ccgg

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2025-05-09	0002-5026-1002-01-01-3001 -2025-04-28-1830	The latest version
2024-12-25	0002-5026-1002-01-01-3001 -2025-01-01-0002
2024-08-30	0002-5026-1002-01-01-3001 -2024-08-19-1153	Included in Yearly Fixed Dataset 2024
2024-02-27	0002-5026-1002-01-01-3001 -2024-02-20-1243
2023-08-25	0002-5026-1002-01-01-3001 -2023-08-25-0903	Included in Yearly Fixed Dataset 2023