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

 CO₂ _ ZGT6011 _ surface - insitu _ UBAG _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-24	0071-6011-1001-01-01-9999 -2025-01-01-0111† met	The latest version
2022-04-15	0071-6011-1001-01-01-9999 -2022-04-15-1109† met	Included in Yearly Fixed Dataset 2024
2020-02-25	0071-6011-1001-01-01-9999 -2019-12-03-1902† met	Included in Yearly Fixed Dataset 2021
2020-02-10	0071-6011-1001-01-01-9999 -2020-02-10-0828
2019-09-09	0071-6011-1001-01-01-9999 -2019-09-09-1607
2018-07-11	0071-6011-1001-01-01-9999 -2018-06-25-1143	Included in Yearly Fixed Dataset 2019