W.C. Oechel, G.L. Vourlitis, T. Gilmanov, V. Nosov, D. Stow and A. Hope (San Diego State University, San Diego, California, 92182 USA). S. Brooks, T. Crawford, E. Dumas, and R. McMillan (NOAA ATDD Oak Ridge, TN USA) D. Kane and L. Hinzman (University of Alaska, Fairbanks, AK USA)
Chamber, eddy correlation tower, and aircraft based eddy correlation have been used to determine CO2, H2O, and energy flux in the Alaskan tundra. Initial results show close agreement among approaches. Information from vegetation, soils, energy balance, regional climate, and phenomenological models have been used to extrapolate flux to the Kuparuk River Basin. NDVI, climate variables, and vegetation type along with information on rates and controls on photosynthesis and respiration are important in modelling CO2 fluxes. Aircraft measurements have proven key in adequately sampling spatial variation in fluxes over the watershed, and have demonstrated spatial distribution of fluxes
Walter C. Oechel Global Change Research Group San Diego State University San Diego, California 92182 Tel. (619) 594-4818 Fax (619) 594-7831 oechel@sunstroke.sdsu.edu