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

 CO₂ _ BCK4129 _ surface - insitu _ ECCC _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-19	0020-4129-1001-01-01-9999 -2025-01-01-0020	The latest version
2024-07-19	0020-4129-1001-01-01-9999 -2024-07-16-1038#20	Included in Yearly Fixed Dataset 2024
2023-09-01	0020-4129-1001-01-01-9999 -2023-08-31-0904#19	Included in Yearly Fixed Dataset 2023
2022-09-02	0020-4129-1001-01-01-9999 -2022-08-29-1009#18	Included in Yearly Fixed Dataset 2022