"For Scientific purposes, access to these data is unlimited and provided without charge. By their use you accept that an offer of co-authorship will be made through personal contact with the data providers or owners whenever substantial use is made of their data. In all cases, an acknowledgement must be made to the data providers or owners and to the data centre when these data are used within a publication."

Advanced Global Atmospheric Gases Experiment Science Team(AGAGE), Atmospheric Chemistry Research Group School of Chemistry University of Bristol, Commonwealth Scientific and Industrial Research Organisation, Global Monitoring Laboratory, NOAA, National Research Council, Institute of Atmospheric Sciences and Climate,

Colm Sweeney (NOAA), Dickon Young (UNIVBRIS), Elise Guerette (CSIRO), Gabrielle Petron (NOAA), Jgor Arduini (UNIURB), Kieran Stanley (UNIVBRIS), Paul Fraser (CSIRO), Paul Krummel (CSIRO), Ray Langenfelds (CSIRO), Ray Wang (EAS), Simon O'Doherty (UNIVBRIS), Zoë Loh (CSIRO), WDCGG; All H₂ data contributed to WDCGG by GAW stations and mobiles by 2025-07-04, (Reference date^*: YYYY/MM/DD)

* As the reference date, please indicate the date you downloaded the files.