Title :
Calculation of TIR canopy hot spot and implications for Earth radiation budget
Author :
Smith, J.A. ; Ballar, J.R., Jr.
Author_Institution :
Lab. for Terrestrial Phys., NASA Goddard Space Flight Center, Greenbelt, MD, USA
Abstract :
Using a 3D model for thermal infrared exitance and the Lowtran 7 atmospheric radiative transfer model, the authors compute the variation in brightness temperature with view direction and, in particular, the canopy thermal hot spot. They then perform a sensitivity analysis of surface energy balance components for a nominal case using a simple SVAT model given the uncertainty in canopy temperature arising from the thermal hot spot effect. Canopy thermal hot spot variations of two degrees C lead to differences of plus or minus 24% in the midday available energy
Keywords :
atmospheric boundary layer; atmospheric radiation; atmospheric techniques; geophysical techniques; remote sensing; vegetation mapping; 3D model; Earth radiation budget; Lowtran 7; SVAT; SVAT model; TIR; atmosphere; boundary layer; brightness temperature; canopy hot spot; canopy thermal hot spot; geophysical measurement technique; land surface; midday available energy; radiative transfer model; remote sensing; sensitivity analysis; soil vegetation atmosphere transfer; surface energy balance; temperature; thermal infrared; thermal infrared exitance; vegetation mapping; view direction; Atmospheric measurements; Atmospheric modeling; Earth; Electronic mail; Layout; Meteorology; NASA; Research and development; Satellites; Vegetation;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2000. Proceedings. IGARSS 2000. IEEE 2000 International
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-6359-0
DOI :
10.1109/IGARSS.2000.860292
