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

 HCFC-142b _ TAC6019 _ surface - insitu _ AGAGE _ gc-ms-medusa

Updated Date	Version † met : with meteorological data	Details
2025-08-18	0004-6019-1402-01-01-2023 -2025-08-12-1507	The latest version
2024-12-27	0004-6019-1402-01-01-2023 -2025-01-01-0004
2024-07-26	0004-6019-1402-01-01-2023 -2024-07-19-1308	Included in Yearly Fixed Dataset 2024
2023-08-21	0004-6019-1402-01-01-2023 -2023-08-10-1311	Included in Yearly Fixed Dataset 2023