"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), Global Monitoring Laboratory, NOAA, University of Urbino, Dep. of Pure and Applied Sciences (DISPEA),

Andreas Engel (GU), Chris Lunder (NILU), Dickon Young (UNIVBRIS), Isaac Vimont (NOAA), Jens Mühle (SIO), Jgor Arduini (UNIURB), Kieran Stanley (UNIVBRIS), Martin Vollmer (Empa), Michela Maione (UNIURB), Ove Hermansen (NILU), Paul Fraser (CSIRO), Paul Krummel (CSIRO), Ray F. Weiss (SIO), Ray Wang (EAS), Simon O'Doherty (UNIVBRIS), Stefan Reimann (Empa), Stephen A. Montzka (NOAA), Thomas Wagenhäuser (GU), WDCGG; All C₂Cl₄ data contributed to WDCGG by GAW stations and mobiles by 2024-08-22, (Reference date^*: YYYY/MM/DD)

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