1. P. J. Sellers, G. J. Collatz, S. O. Los, C. J. Tucker, National Aeronautics and Space Administration, Goddard Space Flight Center (NASA GSFC), Biospheric Sciences, Code 923, Greenbelt, MD 20771, USA.
2. L. Bounoua, Universities Space Research Association, NASA GSFC, Biospheric Sciences, Code 923, Greenbelt, MD 20771, USA.
3. D. A. Randall, D. A. Dazlich, T. G. Jensen, Department of Atmospheric Sciences, Colorado State University, Fort Collins, CO 80523, USA.
4. J. A. Berry and C. B. Field, Department of Plant Biology, Carnegie Institution of Washington, Stanford, CA 94305, USA.
5. I. Fung, Department of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, V8N 3X3, Canada.