Landscape level CO2 flux model for Barrow
Collaborators:Steve Oberbauer - Florida International University - Miami, FL.
John Gamon - California State University - Los Angeles, CA.
Fred Huemmrich - University of Maryland - Baltimore County, MA.
Walt Oechel - San Diego State University - San Diego, CA.
A spatially explicit light-use efficiency model was developed for daily Gross Ecosystem Exchange (GEE) on the 16th August 2000 when high spatial resolution IKONOS satellite imagery was acquired. Empirical plot-based light-use efficiency models of daily GEE were developed from diurnal CO2 flux measurements and hyperspectral reflectances.
Ground-based tramline hyperspectral reflectances were used to atmospherically and mechanistically correct IKONOS multispectral imagery bands 3 and 4. These were used to spatially extrapolate light-use efficiency models developed at the plot scale to the landscape level. The model displays extreme detail and a large range in daily GEE at the northern section of the Barrow Environmental Observatory (BEO) ranged from 0 to 2.75 gC m-2 d-1. Accuracy of the model was tested in summer 2002 in a broad range of land cover types.