"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, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Japan Meteorological Agency, Korea Meteorological Administration, Meteorological Research Institute, National Institute for Environmental Studies, National Institute of Meteorological Research, KMA, New Energy and Industrial Technology Development Organization, Norwegian Institute for Air Research, University of Urbino, Dep. of Pure and Applied Sciences (DISPEA),

Alcide di Sarra (ENEA), Andreas Engel (GU), Bradley D. Hall (NOAA), Chris Lunder (NILU), Christina Harth (SIO), Daegeun Shin (KMA), Damiano Sferlazzo (ENEA), Debra J. Mondeel (NOAA), Dickon Young (UNIVBRIS), ENYO Kazutaka (JMA), Francesco Monteleone (ENEA), Geoffrey S. Dutton (NOAA), Isaac Vimont (NOAA), J. David Nance (NOAA), Jens Mühle (SIO), Jgor Arduini (UNIURB), KANSO TECHNOS (KANSO), Kazuhiro Tsuboi (MRI), Kieran Stanley (UNIVBRIS), Martin Vollmer (Empa), Michela Maione (UNIURB), ONO Etsuro (JMA), Ove Hermansen (NILU), Paul Fraser (CSIRO), Paul Krummel (CSIRO), Ray F. Weiss (SIO), Ray Wang (EAS), Salvatore Piacentino (ENEA), SE-HWAN YANG (KMA), Simon O'Doherty (UNIVBRIS), Stefan Reimann (Empa), Stephen A. Montzka (NOAA), Sunyoung Park (KNU), TAKATSUJI Shinya (JMA), Takuya Saito (NIES), Tatiana Di Iorio (ENEA), Thomas Wagenhäuser (GU), WDCGG; All CFC-11 data contributed to WDCGG by GAW stations and mobiles by 2025-07-01, (Reference date^*: YYYY/MM/DD)

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