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

 CH₄ _ BRW4003 _ surface - insitu _ NOAA _ ccgg

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2025-05-09	0002-4003-1002-01-01-3001 -2025-04-28-1830#21	The latest version
2024-12-25	0002-4003-1002-01-01-3001 -2025-01-01-0002
2024-08-30	0002-4003-1002-01-01-3001 -2024-08-19-1153#20	Included in Yearly Fixed Dataset 2024
2024-02-27	0002-4003-1002-01-01-3001 -2024-02-20-1243
2023-08-25	0002-4003-1002-01-01-3001 -2023-08-25-0903#19	Included in Yearly Fixed Dataset 2023
2022-08-16	0002-4003-1002-01-01-3001 -2022-08-03-1259#18	Included in Yearly Fixed Dataset 2022
2021-08-05	0002-4003-1002-01-01-3001 -2021-08-03-0805#17	Included in Yearly Fixed Dataset 2021
2020-08-27	0002-4003-1002-01-01-3001 -2020-08-27-0912#16	Included in Yearly Fixed Dataset 2020
2020-08-25	0002-4003-1002-01-01-3001 -2020-07-28-1013
2019-08-30	0002-4003-1002-01-01-3001 -2019-07-31-0930#15	Included in Yearly Fixed Dataset 2019
2018-09-25	0002-4003-1002-01-01-3001 -2018-09-07-1112#14	Included in Yearly Fixed Dataset 2018
2018-06-25	0002-4003-1002-01-01-3001 -2018-03-09-1452