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

 CO₂ _ SSL6027 _ surface - insitu _ UBAG _ data2

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-24	0071-6027-1001-01-01-9998 -2025-01-01-0111† met	The latest version
2023-10-11	0071-6027-1001-01-01-9998 -2023-10-11-0914† met	Included in Yearly Fixed Dataset 2024
2022-04-15	0071-6027-1001-01-01-9998 -2022-04-15-1109† met	Included in Yearly Fixed Dataset 2023
2020-07-27	0071-6027-1001-01-01-9998 -2020-07-16-1600† met	Included in Yearly Fixed Dataset 2021
2020-07-07	0071-6027-1001-01-01-9998 -2020-06-17-1611† met
2020-05-29	0071-6027-1001-01-01-9998 -2020-05-28-1819† met
2020-02-27	0071-6027-1001-01-01-9998 -2019-12-05-1126† met
2019-07-19	0071-6027-1001-01-01-9998 -2019-07-02-1408	Included in Yearly Fixed Dataset 2019
2018-07-11	0071-6027-1001-01-01-9998 -2018-06-25-1143	Included in Yearly Fixed Dataset 2018