HR: 16:20h
AN: B44B-02 INVITED     [Abstracts]
TI: Similarities and Differenes in Carbon and Energy Fluxes Between Grassland and Agricultural Ecosystems
AU: * Meyers, T P
EM: Tilden.Meyers@noaa.gov
AF: NOAA/Atmospheric Turbulence and Difffusion Division, P.O. Box 2456, Oak Ridge, TN 37830 United States
AB: Grasslands and managed agricultural ecosystems comprise a significant fraction of the terrestrial biosphere. Compared to forested ecosystems, the growing season of grasslands and agricultural systems (periods of carbon sinks) are generally short and are closely linked to the water cycle due to shallow rooting zones. Measurements of carbon and energy fluxes, along with spectral signatures which provide information on the leaf area index, are used to explore the similarities and differences in seasonality of these fluxes and the critical environmental factors that affect the overall net exchange of carbon and energy. Comparisons will not only focus on the growing season when both carbon fixation and transpiration are at their peak values, but the analysis will include the spring and fall periods when the ground is covered with dead plant material that acts as an insulating mulch layer, and the impact this layer has on the fluxes.
DE: 0315 Biosphere/atmosphere interactions
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting