HR: 08:50h
AN: H31A-02 INVITED     [Abstracts]
TI: A Climatological Study of Surface Fluxes over the Continental U.S. using Thermal Remote Sensing
AU: * Anderson, M C
EM: mcanders@wisc.edu
AF: University of Wisconsin-Madison, 1525 Observatory Drive, Madison, WI 53706 United States
AU: Kustas, W P
EM: bkustas@hydrolab.arsusda.gov
AF: USDA-ARS Hydrology and Remote Sensing Laboratory, BARC-West, Beltsville, MD United States
AU: Norman, J M
EM: jmnorman@wisc.edu
AF: University of Wisconsin-Madison, 1525 Observatory Drive, Madison, WI 53706 United States
AB: The Atmosphere-Land Exchange Inverse (ALEXI) model was designed for routine monitoring of surface water, energy, and carbon fluxes at continental scales based on thermal imagery from a geostationary satellite platform. Operational processing of fluxes over the continental U.S. at 10-km resolution commenced in 2002; to date, three consecutive years of flux data have been archived. Simple gap-filling methodologies have been implemented to predict fluxes under cloud cover conditions, when the thermal data are unavailable, and to extrapolate instantaneous fluxes to full hourly and daily coverage. Quantitative validation of the regional ALEXI algorithm has been accomplished by spatially disaggregating the 5-10km flux predictions down to the scale of the measurement sensor footprint, yielding good agreement with tower and aircraft-based eddy-covariance data. Results from a climatological study of continental-scale flux patterns will be presented, along with an analysis of model capabilities in assessing regional moisture stress conditions.
UR: http://www.soils.wisc.edu/alexi
DE: 1818 Evapotranspiration
DE: 1836 Hydrologic budget (1655)
SC: Hydrology [H]
MN: 2005 Joint Assembly