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

 CH₄ _ NYA6066 _ surface - flask _ TU _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-25	0070-6066-1002-01-02-9999 -2025-01-01-0110	The latest version
2022-10-12	0070-6066-1002-01-02-9999 -2022-10-07-1340	Included in Yearly Fixed Dataset 2024
2020-06-22	0070-6066-1002-01-02-9999 -2020-06-16-1759	Included in Yearly Fixed Dataset 2022