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

 ¹⁴CO₂ _ NWR4023 _ surface - flask _ NOAA _ ccgg

Updated Date	Version † met : with meteorological data	Details
2024-12-25	0002-4023-6001-01-02-3001 -2025-01-01-0002	The latest version
2022-07-11	0002-4023-6001-01-02-3001 -2022-07-08-2130	Included in Yearly Fixed Dataset 2024
2021-12-20	0002-4023-6001-01-02-3001 -2021-12-08-1043
2019-09-03	0002-4023-6001-01-02-3001 -2019-09-02-1741	Included in Yearly Fixed Dataset 2021
2018-06-26	0002-4023-6001-01-02-3001 -2018-04-09-1537	Included in Yearly Fixed Dataset 2018