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

 CO _ ARH7009 _ surface - flask _ NIWA _ data1

Updated Date	Version † met : with meteorological data	Details
2025-07-29	0057-7009-3001-01-02-9999 -2025-06-30-0523† met	The latest version
2024-12-24	0057-7009-3001-01-02-9999 -2025-01-01-0057† met
2024-07-01	0057-7009-3001-01-02-9999 -2024-06-26-2127† met	Included in Yearly Fixed Dataset 2024
2023-08-28	0057-7009-3001-01-02-9999 -2023-08-28-0848† met	Included in Yearly Fixed Dataset 2023
2022-07-04	0057-7009-3001-01-02-9999 -2022-06-29-2355† met	Included in Yearly Fixed Dataset 2022
2021-07-07	0057-7009-3001-01-02-9999 -2021-06-30-0435† met	Included in Yearly Fixed Dataset 2021
2020-07-08	0057-7009-3001-01-02-9999 -2020-07-01-0853† met	Included in Yearly Fixed Dataset 2020
2020-02-25	0057-7009-3001-01-02-9999 -2019-10-16-1145† met
2019-09-06	0057-7009-3001-01-02-9999 -2019-09-04-1245	Included in Yearly Fixed Dataset 2019
2018-07-17	0057-7009-3001-01-02-9999 -2018-07-03-0535	Included in Yearly Fixed Dataset 2018
2018-06-08	0057-7009-3001-01-02-9999 -2018-02-05-1000