Historical CO2 record from the Vostok ice core - J.M. Barnola, D. Raynaud, C. Lorius, and N.I. Barkov
Historical CO2 record from the Siple Station ice core- A. Neftel, H. Friedli, E. Moor, H. Lötscher, H. Oeschger, U. Siegenthaler, and B. Stauffer
Historical CO2 records from the Law Dome DE08, DE08-2, and DSS ice cores- D.M. Etheridge, L.P. Steele, R.L. Langenfelds, R.J. Francey, J.-M. Barnola, and V.I. Morgan
Monthly atmospheric CO2 records from sites in the SIO air sampling network - C.D. Keeling and T.P. Whorf
Monthly atmospheric CO2 concentrations from the CSIRO GASLAB flask sampling network - L.P. Steele, P.B. Krummel, and R.L Langenfelds
Atmospheric CO2 records from sites in the AES air sampling network - N.B.A. Trivett, V.C. Hudec, and C.S. Wong
Atmospheric CO2 records from sites in the UBA air sampling network - W. Fricke and M. Wallasch
Atmospheric CO2 record from flask measurements at Lampedusa Island - P. Chamard, L. Ciattaglia, A. di Sarra, and F. Monteleone
Atmospheric CO2 record from continuous measurements at Jubany Station, Antarctica - L. Ciattaglia, C. Rafanelli, H. Rodriguez, and J. Araujo
Atmospheric CO2 record from in situ measurements at Mt. Cimone - T. Colombo and R. Santaguida
Atmospheric CO2 record from in situ measurements at Baring Head - M.R. Manning, A.J. Gomez, and K.P. Pohl
Atmospheric CO2 records from sites in the Main Geophysical Observatory air sampling network - A.M. Brounshtein, A.A. Shashkov, N.N. Paramonova, V.I. Privalov, and Y.A. Starodubtsev
δ13C in CO2 from the CSIRO GASLAB Flask Sampling Network - C.E. Allison, R.J. Francey, and P.B. Krummel
Atmospheric δ14 CO2 record from Wellington - M.R. Manning and W.H. Melhuish
δ14 CO2 records from two sites in Central Europe - I. Levin, B. Kromer, H. Schoch-Fischer, M. Bruns, M. Münnich, D. Berdau, J.C. Vogel, and K.O. Münnich