Evolution of the variability of surface temperature and vegetation density in the great plains |
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| Authors: | Michael H Cosh Jery R Stedinger Steve C Ou Kuo-Nan Liou Wilfried Brutsaert |
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| Institution: | 1. Hydrology and Remote Sensing Laboratory, Rm 104 Bldg 007, BARC-West, USDA-ARS, Beltsville, MD 20705, USA;2. School of Civil and Environmental Engineering, Cornell University, 220 Hollister Hall, Ithaca, NY 14853-3501, USA;3. 7127 Math Sciences, Department of Atmospheric Sciences, University of California, Los Angeles, 7127 Math Sciences, Los Angeles, CA 90095, USA |
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| Abstract: | This study focuses on how the variability of land surface temperature and vegetation density at the SGP ARM-CART site changes over episodic (day to day) and seasonal time scales using AVHRR satellite data. Four drying periods throughout the year are analyzed. Land surface temperature had an erratic relationship with time exhibiting no deterministic pattern from day-to-day or season-to-season. Furthermore, it did not exhibit spatial pattern persistence. On the other hand, vegetation density had a consistent spatial pattern and temporal decay during average length drying periods (less than 7 days) as well as within a season. However, there were distinct differences in the seasonal pattern of variation between winter and growing seasons. In addition, the paper highlights a methodology to quantify the relationships that exist at the land surface between the primary parameter of interest and the controlling variables. |
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| Keywords: | Hydrologic data Land surface temperature Hydrometeorology Vegetation Statistics |
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