HR: 13:40h
AN: B43F-01    [Abstracts]
TI: Regional carbon budget approach and progress in support of the North American Carbon Program: ORCA Overview
AU: * Law, B E
EM: bev.law@oregonstate.edu
AF: Oregon State University, College of Forestry, Corvallis, OR 97331 United States
AU: Turner, D
EM: david.turner@oregonstate.edu
AF: Oregon State University, College of Forestry, Corvallis, OR 97331 United States
AU: Cohen, W B
EM: warren.cohen@oregonstate.edu
AF: USDA Forest Service, PNW Forest Science Laboratory, Corvallis, OR 97331 United States
AU: Styles, J
EM: julie.styles@oregonstate.edu
AF: Oregon State University, College of Forestry, Corvallis, OR 97331 United States
AB: The project is a North American Carbon Program regional intensive, and it is part of CARBIUS, a US-Italy joint effort to develop regional carbon balance approaches. The goals of the project are to 1) provide a regional test of the overall NACP strategy by demonstrating bottom-up and model-data fusion approaches to determining the carbon balance of Oregon and northern California (ORCA project), and 2) to develop global carbon cycle modeling and analysis focused on the use of remote sensing data. The approaches and progress will be presented. The bottom-up approach synthesizes a spatially nested hierarchy of observations (multi-spectral remote sensing, inventories, flux and extensive sites), and the Biome-BGC model to quantify the carbon balance across the region. The model-data fusion scheme uses MODIS products, Landsat data, AmeriFlux carbon dioxide concentration data and a boundary layer model to estimate NEP across the region and partition it among gross primary production, autotrophic respiration, and heterotrophic respiration. Observations are distributed amongst surrounding landcover types through footprint modeling, and incorporated into a parameter estimation scheme to minimize differences between modeled and measured net ecosystem fluxes. The scheme allows estimates of uncertainty and sensitivity of flux components to driving variables. The ultimate goal of the project is to provide critical understanding of the controls on regional carbon balance (how NEP and carbon stocks are influenced by disturbance from fire and management, land use, and interannual climate variation).
UR: http://www.fsl.orst.edu/terra/orca.htm
DE: 3322 Land/atmosphere interactions (1218, 1631, 1843)
DE: 4805 Biogeochemical cycles, processes, and modeling (0412, 0414, 0793, 1615, 4912)
SC: Biogeosciences [B]
MN: Fall Meeting 2005