SPATIAL-DISTRIBUTION OF SURFACE FLUXES ESTIMATED FROM REMOTELY-SENSEDVARIABLES

This study relates surface fluxes to remotely sensed variables over we ll-defined variations of surface wetness and vegetation. The surface f luxes are estimated from repeated Twin Otter aircraft flights at 33 m above the surface after correcting for advection and local storage bet ween the aircraft level and the surface. An extensive analysis of flux errors due to finite sample size over heterogeneous terrain is perfor med. The resulting surface energy budget seems to balance only if meso scale fluxes are included. The spatial variation of the surface fluxes and atmospheric temperature and moisture are well predicted for these specific surface conditions by a model based on the normalized differ ence of vegetation index and brightness temperatures of channels 4 and 5 from the NOAA-11 Advanced Very High Resolution Radiometer.