HR: 0800h
AN: B21B-1027 INVITED     [Abstracts]
TI: VEMAP vs VINCERA: A DGVM sensitivity to climate, CO2, nitrogen, and fire
AU: * Bachelet, D
EM: bachelet@fsl.orst.edu
AF: Oregon State University, Dept of Bioengineering, Corvallis, OR 97331 United States
AU: Neilson, R P
EM: rneilson@fs.fed.us
AF: USDA Forest Service, PNW Research Station, Forestry Sciences Laboratory 3200 S.W. Jefferson Way, Corvallis, OR 97331 United States
AU: Lenihan, J M
EM: jlenihan@fs.fed.us
AF: USDA Forest Service, PNW Research Station, Forestry Sciences Laboratory 3200 S.W. Jefferson Way, Corvallis, OR 97331 United States
AU: Drapek, R
EM: rdrapek@fs.fed.us
AF: USDA Forest Service, PNW Research Station, Forestry Sciences Laboratory 3200 S.W. Jefferson Way, Corvallis, OR 97331 United States
AB: The MC1 DGVM has been used in two large model comparison projects, VEMAP (Vegetation Ecosystem Modeling and Analysis Project) and VINCERA (Vulnerability and Impacts of North American forests to Climate Change: Ecosystem Responses and Adaptation). This talk will highlight the challenges faced with each new climate dataset: we will compare future climate scenarios from both VEMAP and VINCERA projects and how the different inputs have affected the carbon budget and vegetation distribution projections. In those two projects, MC1 has been compared with other models which included different assumptions about plant responses to climate change and atmospheric CO2 enhancement. We will compare observations with MC1's simulated plant response to similar environmental conditions to those of the FACE experiments and discuss the merits of the 'greenworld' vs. the 'brown-down' theories. We will show the impacts of including N limitation on model results and the uncertainty associated with the available N input information. Finally we will discuss the importance of human impacts such as fire suppression on simulation results.
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0466 Modeling
DE: 0476 Plant ecology (1851)
SC: Biogeosciences [B]
MN: Fall Meeting 2005