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

 H₂ _ THD4022 _ surface - flask _ NOAA _ ccgg

Updated Date	Version † met : with meteorological data	Details
2024-12-25	0002-4022-4001-01-02-3001 -2025-01-01-0002	The latest version
2024-08-30	0002-4022-4001-01-02-3001 -2024-08-13-1019	Included in Yearly Fixed Dataset 2024
2023-09-04	0002-4022-4001-01-02-3001 -2023-09-04-1418	Included in Yearly Fixed Dataset 2023
2023-07-10	0002-4022-4001-01-02-3001 -2023-07-06-0837