See the data version history.
The data of old versions are not available at WDCGG.

Updated Date	Version * : the latest version	GAW ID	Station/Mobile	Gas Species † met : with meteorological data	Platform	Sampling Type	Buffer	Organization	Details
2024-07-19	0016-5002-4001-01-02-9999 -2024-07-02-1636*	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)	click
2023-07-18	0016-5002-4001-01-02-9999 -2023-07-14-1015	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2022-07-08	0016-5002-4001-01-02-9999 -2022-06-23-1539	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2021-07-09	0016-5002-4001-01-02-9999 -2021-07-05-0440	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2021-04-09	0016-5002-4001-01-02-9999 -2021-04-08-1004	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2020-07-08	0016-5002-4001-01-02-9999 -2020-06-29-1029	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2019-07-26	0016-5002-4001-01-02-9999 -2019-07-19-1754	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2018-10-18	0016-5002-4001-01-02-9999 -2018-10-05-1414	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)
2018-06-18	0016-5002-4001-01-02-9999 -2018-03-13-1404	MLO	Mauna Loa (HI)	H2	surface	flask	data1	CSIRO (Commonwealth Scientific and Industrial Research Organisation)