Ciattaglia , L. , Guerrini , A. and Colombo , T. 1996 . Atmo-spheric CO2 Monitoring in an Antarctic remote site: Jubany Station (South Shetland) . SIF Bologna, Conf. Proceed . 51 , 181 – 188 .
Ciais , P. , Tans , P. P. , Trolier , M. , White , J. W. C. and Francey , R. J. 1995 . A large northern hemisphere terrestrial CO2 sink indicated by the 13C/12C ratio of atmospheric CO2 . Science 269 , 1098 – 1102 .
Conway , T. J. , Tans , P. P. , Waterman , L. S. , Thoning , K. W. , Kitzis , D. R. , Masarie , K. A. and Zhang , N. 1994 . Evidence for interannual variability of the carbon cycle from the NOAA/CMDL global air sampling network. J. Geophys. Res. 99, 22,831-22,855. Cundari, V., Colombo, T. and Ciattaglia, L. 1995. 13 years of atmospheric carbon dioxide measurements at Mt Cimone station, Italy . II Nuovo Cimento 18C , 33 – 47 .
Denning , S. , Randall , D. A. , Collatz , G. J. and Sellers , P. J. 1996 . Simulations of terrestrial carbon metabolism and atmospheric CO2 in a general circulation model, Part 2: Simulated CO2 concentrations , Tel/us 48B , 543 – 567 .
Gardner , E. S. Jr . 1985 . Exponential smoothing : The state of the art Journal of Forecasting 4 , 1 – 28 .
GLOBALVIEW-CO2: Cooperative Atmospheric Data Integration Project. Carbon dioxide. 1997. CD-ROM, NOAA/CMDL, Boulder, Colorado (also available on Internet via anonymous FTP to ftp.cmdl.noaa.gov, Path: ccg/co2/GLOBALVIEW).
Intergovernmental Panel on Climate Change (IPCC), Climate change 1995 : the science of climate change. Cambridge University Press, New York, 1996 , pp. 572. Keeling , C. D. , Piper , S. C. and Heimann , M. 1989 . In: Aspects of climated variability in the Pacific and Western Americas, D. H. Peterson, ed. American Geophysical Union, Washington, DC , 1989 , 55 , pp. 165 .
Rayner , P. J. , Enting , I. G. and Trudinger , C. M. 1996 . Optimizing the CO2 observing network for constraining sources and sinks . Tel/us 48B , 433 – 444 .
Tans , P. P. , Conway , T. J. and Nakazawa , T. 1989 . Latitudinal distribution of the sources and sinks of atmospheric carbon dioxide derived from surface observations and an atmospheric transport model . J. of Geophys. Res . 94 , 5151 – 5172 .
Tans , P. P. , Fung , I. Y. and Takahashi , T. 1990 . Observational constraints on the global atmospheric CO2 budget . Science 247 , 1431 – 1438 .
Tans , P. P. , Bakwin , P. and Guenther , D. 1996 . A feasible global carbon cycle observing system: a plan to decipher today's carbon cycle based on observations . Global Change Biology 2 , 309 – 318 .
Thoning , K. W. , Tans , P. P. and Kohmyr , W. D. 1989 . Atmospheric carbon dioxide at Mauna Loa Observatory, 2: Analysis of the NOAA/GMCC data, 1974-1985 , J. Geophys. Res . 94 , 8549 – 8565 .
WMO . Global ozone research and monitoring project , 1994. Rep. No 37 WMO Geneva.