The Kuparuk River watershed was divided into 123, 10*10 km grid cells. The cells are labeled Cell 1 - 123 from north-west to south-east (Toolik Lake is located in Cell 119). We applied the model one grid cell at a time at the 10 km x 10 km resolution predefined map. We assumed there was no interaction between adjacent grid cells. We ran MBL-GEM III to steady state for each of the grid cells, using the reconstructed 1921-1925 average climate. (Le Dizès et al., in press). When the steady state was reached, the drivers were varied yearly based on the historical reconstruction of climate and CO2 (1921-2000) and the two predicted future climate scenarios (2001-2100). These simulations use the tussock tundra calibration developed by Le DizŠs et al. (in press) for Toolik Lake, Alaska. For more information, including analysis and discussion of these resultsLe Dizès, S., B. L. Kwiatkowski, E. B. Rastetter, A. Hope, J. E. Hobbie, D. Stow, and S. Daeschner, Modeling biogeochemical responses of tundra ecosystems to temporal and spatial variations in climate in the Kuparuk River Basin (Alaska), J. Geophys. Res., 108(D2), 8165, doi:10.1029/2001JD000960, 2003.

NOTES: MODEL NAME: MBL-GEM III version described in Le Dizès et al. (2003).

ACKNOWLEDGEMENTS: This research was supported by funds from the National Science Foundation (NSF-LTER 0221000# and NSF-OPP 9732281). We wish to thank D. Walker and L. Hinzman for data.