Evaluation of terrestrial carbon cycle models through simulations of the seasonal cycle of atmospheric CO₂: First results of a model intercomparison study

M. Heimann, G. Esser, A. Haxeltine, J. Kaduk, D. W. Kicklighter, W. Knorr, G. H. Kohlmaier, A. D. McGuire, J. Melillo, B. Moore, R. D. Otto, I. C. Prentice, W. Sauf, A. Schloss, S. Sitch, U. Wittenberg, G. Würth