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TITLE:
Use of Remotely Sensed and in situ Data to Investigate the Effects of Surface Heterogeneity and Terrain on the Spatial and Temporal Distribution of Sensible and Latent Heat Fluxes
INVESTIGATORS:
John Schieldge and Anne Kahle (JPL)
OBJECTIVES:
1. Use of high resolution TIR aircraft measurements from aircraft overflights to statistically analyze the relation between radiometric surface temperature and in situ surface measurements of temperature and convective heat flux densities.
2. Investigate spatial and temporal distribution of heat flux densities on hilly terrain, and over surfaces with dissimilar properties.
3. Comparison of convective heat flux density performance (resistance, variance, surface renewal) methods and their relative accuracies and robustness.
APPROACH:
Aircraft overflight(s) during August 10-12 window using TIMS (and possibly the TM Simulator) on the DOE Citation. Up to 5 flight lines flown (TBD) starting at 10:30 AM. Ground network of surface energy balance and soil moisture monitoring equipment principally at the Walnut Gulch area.
DATA COLLECTION:
TIMS data ground resolution about 15-m. Ground data collection of eddy correlation equipment (sonic anemometers and kryton hygrometers), plus profile system (winds, air temperature, and humidity), Time Domain Reflectometer, net radiometer, and soil heat flux plates and thermocouples. A number of fine wire thermocouples mounted on a simple mast system will also be used to estimate sensible heat from the mean and variance of the air temperature.
DATA REQUIRED FROM OTHER INVESTIGATORS:
1. Surface Flux data at other locations i.e. Lewis Springs, US/Mexico Border area, etc., and from other groups (e.g., LIDAR,USDA/ARS,USGS).
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