# 5 NET PRIMARY PRODUCTIVITY MODEL INTERCOMPARISON ACTIVITY ( NPP ) By Wolfgang Cramer and the participants * of the " Potsdam ' 95 " NPP model intercomparison workshop

• G. Churkina, G. Colinet, J. Collatz, W. Emanuel, G. Esser, C. Field, A. Fischer, A. Friend, A. Haxeltine, M. Heimann, J.Hoffstadt, C. Justice, J. Kaduk, L. Kergoat, D. Kicklighter, W. Knorr, G. Kohlmaier, B. Lurin, P. Maisongrande, P. Martin, R. McKeown, B. Meeson, B. Moore, R. Olson, R. Otto, W. Parton, M. Pleochl, S. Prince, J. Randerson, I. Rasool, B. Rizzo, A. Ruimy, S. Running, D. Sahagian, B. Saugier, A. Schloss, J. Scurlock, W. Steffen, P. Warnant, U. Wittenberg