HR: 16:45h
AN: B44B-04    [Abstracts]
TI: The Role of the Flux Aircraft in Bottom-Up Scaling in the Bondville Intensive Campaign 2005
AU: * Williamson, D
EM: DWilliamson@coe.eng.ua.edu
AF: University of Alabama, Department of Civil and Environmental Engineering, PO Box 870205, Tuscaloosa, AL 35487-0205 United States
AU: Dobosy, R
EM: Ron.Dobosy@noaa.gov
AF: Atmospheric Turbulence and Diffusion Division NOAA/ARL, PO Box 2456, Oak Ridge, TN 37831-2456 United States
AU: Kirby, S
EM: SKirby@almonassociates.com
AF: University of Alabama, Department of Civil and Environmental Engineering, PO Box 870205, Tuscaloosa, AL 35487-0205 United States
AU: Dumas, E
EM: Ed.Dumas@noaa.gov
AF: Atmospheric Turbulence and Diffusion Division NOAA/ARL, PO Box 2456, Oak Ridge, TN 37831-2456 United States
AB: The Bondville, Illinois intensive campaign features an integrated, bottom-up approach to extrapolating tower-based CO₂ fluxes up to regional estimates of flux. The overall approach is: (1) to measure flux at several towers covering approximately 200 km² over corn and soybean fields, (2) to use a flux aircraft to measure flux (momentum, CO₂, H₂0, sensible, and latent heat) and atmospheric structure, (3) to collect remotely sensed images in thermal IR (8-12)μm and three visual bands using Utah State's dedicated Piper Seneca, (4) to obtain satellite shots of the study region, (5) to perform landscape modeling of fluxes using data remotely sensed from satellite and aircraft along with in-situ soil characterization data in the University of Wisconsin's ALEXI model, and (6) to compare the different estimates of fluxes from each technique at various temporal and spatial scales. Ultimately, a model such as ALEXI further evolved through the measurements and relationships established during the intensive can be used to estimate regional fluxes. The campaign is scheduled to take place over three years, with the vast majority of the measurements being made from mid June until mid September. For the first year (2005), data necessary for the integrated methodology were collected during the first three weeks of June. From June 2005 until September, a total of seven flux towers was operated (two permanent AmeriFlux towers and five supplemental towers provided by cooperating researchers). Utah State's Remote Sensing aircraft obtained high resolution (1m-4m) thermal data over our 200 km² study site in Champaign county (10km x 20km ). The combined efforts of many independently-funded researchers at the Champaign site has provided a fruitfully synergistic assemblage of data, including canopy-structure measurements by a German group led by Dr. Uwe Rascher. We will describe the Intensive and the role of various research teams, emphasizing the fluxes obtained using the Sky Arrow aircraft, the design of the flight profiles, and atmospheric structure measurements made from the aircraft. A new methodology for calculating fluxes from aircraft data, as well as comparisons to tower data will be shown and discussed. The contrast in fluxes over corn and soybean, and the averaged fluxes blended over the region will be presented.
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 0428 Carbon cycling (4806)
DE: 3307 Boundary layer processes
DE: 3379 Turbulence (4490)
SC: Biogeosciences [B]
MN: Fall Meeting 2005