• Conway, T. J., P. Tans, L. S. Waterman, K. W. Thoning, K. A. Masarie, and R. H. Gammon (1988), Atmospheric carbon dioxide measurement in the remote global troposphere, 1981–1984, Tellus, Ser. B, 40, 81115.
  • Keeling, C. D., P. R. Guether, and D. J. Moss (1986), Scripps reference gas calibration system for carbon dioxide-in-air standards, Publ. 42, Environ. Pollut. Monit. and Res. Programme, World Meteorol. Organ., Geneva, Switzerland.
  • Komhyr, W. D., T. B. Harris, and L. S. Waterman (1985), Calibration of nodispersive infrared CO2 analyzers with CO2-in-air reference gases, J. Atmos. Oceanic Technol., 2, 8288.
  • Laitinen, H. A. (1960), Chemical Analysis, 611 pp., McGraw-Hill, New York.
  • Tanaka, M., T. Nakazawa, and S. Aoki (1983), High quality measurements of the concentration of atmospheric carbon dioxide, J. Meteorol. Soc. Jpn., 61, 678685.
  • Tans, P., and C. Zhao (2003), Maintenance and propagation of the WMO mole fraction scale for carbon dioxide in air, paper presented at 12th WMO/IAEA Meeting of Experts on Carbon Dioxide Concentration and Related Tracer Measurements Techniques, World Meteorol. Organ., Toronto, Ont., Canada.
  • Taylor, B. N., and C. E. Kuyatt (1994), Guidelines for evaluating and expressing the uncertainty of NIST measurement results, NIST Tech. Note 1297, Natl. Inst. of Stand. and Technol., Gaithersburg, Md.
  • Taylor, B. N., and C. E. Kuyatt (1998), A new NIST automated calibration system for industrial-grade platinum resistance thermometer, NIST IR 6225, Natl. Inst. of Stand. and Technol., Gaithersburg, Md.
  • Taylor, J. R. (1982), An Introduction to Error Analysis, pp. 5257, Univ. Sci. Books, Mill Valley, Calif.
  • World Meteorological Organization (1975), Report of the experts meeting on carbon dioxide monitoring, WMO network for monitoring background pollution, Publ. EP-1/Doc. 5, Geneva, Switzerland.
  • Zhao, C., P. Tans, and K. W. Thoning (1997), A high precision manometric system for absolute calibration of CO2 in dry air, J. Geophys. Res., 102, 58855894.