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

 N₂O _ LAU5014 _ surface - flask _ ESNZ _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2026-07-22	0057-5014-1003-01-02-9999 -2026-07-21-0910† met	The latest version
2025-07-28	0057-5014-1003-01-02-9999 -2025-07-15-0224#21† met	Included in Yearly Fixed Dataset 2025