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

 ¹⁴CO₂ _ MQA5015 _ surface - flask _ GNS _ data1

Updated Date	Version † met : with meteorological data	Details
2026-09-03	0120-5015-6001-01-02-9999 -2026-09-01-1050† met	The latest version
2025-07-11	0120-5015-6001-01-02-9999 -2025-06-11-0430† met	Included in Yearly Fixed Dataset 2025