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

 N₂O _ ALT4001 _ surface - flask _ ECCC _ data1

Updated Date	Version # : used for analysis in the WMO GHG Bulletin (#Volume) † met : with meteorological data	Details
2024-12-19	0020-4001-1003-01-02-9999 -2025-01-01-0020	The latest version
2022-09-05	0020-4001-1003-01-02-9999 -2022-09-05-0724	Included in Yearly Fixed Dataset 2024
2020-10-19	0020-4001-1003-01-02-9999 -2020-10-16-1702	Included in Yearly Fixed Dataset 2021
2019-09-03	0020-4001-1003-01-02-9999 -2019-09-02-1446	Included in Yearly Fixed Dataset 2020
2018-06-13	0020-4001-1003-01-02-9999 -2018-03-22-1202	Included in Yearly Fixed Dataset 2018