Contact:  Kevin Gurney

TransCom is is a special project of the International Geosphere-Biosphere Programme (IGBP), Global Analysis, Interpretation, and Modeling (GAIM) Project, the objective of which is to quantify and diagnose the uncertainty in inversion calculations of the global carbon budget that result from errors in simulated atmospheric transport, the choice of measured atmospheric carbon dioxide data used, and the inversion methodology employed.

Two distinct phases of the TransCom (TransCom 1 and TransCom 2) have now been completed with a third phase currently underway (TransCom 3)


  • Rayner, P. J. and Law, R. M., 1995. A comparison of modelled responses to prescribed CO2 sources. CSIRO Division of Atmospheric Research Technical Paper No. 36.
  • Denning, A. S., M. Holzer, K. R. Gurney, M. Heimann, R. M. Law, P. J. Rayner, I. Y. Fung, S.-M. Fan, S. Taguchi, P. Friedlingstein, Y. Balkanski, J. Taylor, M. Maiss, and I. Levin, 1999. Three-dimensional transport and concentration of SF6: A model intercomparison study (TransCom 2). Accepted by Tellus.