External Links
Lamont-Doherty Earth Observatory
https://lamont.columbia.edu/
University of Utah Dissolved and Noble Gas Laboratory
http://www.noblegaslab.utah.edu/index.html
Alternative Fluorocarbons Environmental Acceptability Study
http://www.afeas.org
ALE/GAGE/AGAGE Network
https://agage.mit.edu/
NOAA Earth System Research Laboratory, Global Monitoring Division
http://www.cmdl.noaa.gov
NOAA National Climatic Data Center
http://www.ncdc.noaa.gov
Environmental Isotope Laboratory, University of Waterloo
http://www.uweilab.ca
U.S. Geological Survey Isotope Tracers Project
http://wwwrcamnl.wr.usgs.gov/isoig
Reston Stable Isotope Laboratory -- Isotope Fractionation Project
http://isotopes.usgs.gov
GDAT intercomparison exercice on CFCs and SF6 tracers for groundwater dating
https://insu.hal.science/file/index/docid/934494/filename/PL03219.pdf
