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

 CO₂ _ STC6013 _ surface - flask _ MGO _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-24	0046-6013-1001-01-02-9999 -2025-01-01-0046	The latest version
2018-06-29	0046-6013-1001-01-02-9999 -2018-02-23-0729#20	Included in Yearly Fixed Dataset 2024