PARENT SESSION
Poster Session #42: Carbon Storage.
Thursday, August 9, 2001. Presentation from 3:30 PM to 5:00 PM. Exhibition Hall
136
Calibration of Biome-BGC for UMBS Forest Site in Northern Michigan.
Judge, Jasmeet1, Curtis, Peter 2, Randolph, James1, 1 2
ABSTRACT- The rate of CO2 accumulation varies significantly over the time scales of climatological interests. To understand and quantify this variability, a long-term flux measurement network of the Americas (AmeriFlux) was implemented. The AmeriFlux sites monitor CO2 fluxes using the eddy covariance method and ecological inventory methods at different temporal scales for various physical ecosystems. These measurements are augmented by observations of environmental conditions, ecological and physiological parameters. Recently, Running et al. initiated an effort to calibrate the Biome BGC ecosystem model for AmeriFlux sites and conduct an inter-site comparison. In this study, we calibrate BIOME-BGC for the University of Michigan Biological Station (UMBS) Forest site in Michigan. The site is located at 45-35'N, 84-42'W and consists primarily of bigtooth and trembling aspen, northern hardwoods, and white pine. The model was forced with observed weather and downwelling solar radiation for the simulation period from January, 1961 through the present. Initial conditions specific to the site were obtained from the field observations at the site and from the spin-up run of the model. We compared the model estimates of Net Ecosystem Production (NEP), Net Primary Production (NPP), Actual Evapotranspiration (AET), and Leaf Area Index (LAI) with the observed data at the site.
KEY WORDS: Biome-BGC, Ecosystem model calibration, UMBS AmeriFlux Site