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

 ¹³CH₄ _ ASC1007 _ surface - flask _ NOAA _ sil

Updated Date	Version † met : with meteorological data	Details
2025-08-29	0002-1007-1101-01-02-3101 -2025-08-21-1301	The latest version
2024-12-25	0002-1007-1101-01-02-3101 -2025-01-01-0002
2023-10-03	0002-1007-1101-01-02-3101 -2023-10-02-0922	Included in Yearly Fixed Dataset 2024
2023-04-20	0002-1007-1101-01-02-3101 -2023-04-17-1512	Included in Yearly Fixed Dataset 2023
2022-07-13	0002-1007-1101-01-02-3101 -2022-07-11-0847	Included in Yearly Fixed Dataset 2022
2019-09-03	0002-1007-1101-01-02-3101 -2019-09-02-1741	Included in Yearly Fixed Dataset 2021
2018-10-02	0002-1007-1101-01-02-3101 -2018-10-01-1408	Included in Yearly Fixed Dataset 2018
2018-06-29	0002-1007-1101-01-02-3101 -2018-04-09-0911