15 March 2002 MODIS land surface temperatures and their relationship with hydroclimatological parameters
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Abstract
Daily land surface temperatures (LST) of Moderate Resolution Imaging Spectroradiometer (MODIS) data were analyzed to determine how the data were correlated with climatic water budget variables. Using a climatic water budget program, four daily water budget factors were calculated at six weather stations across the state; percent soil moisture, AE/PE, water deficit, and water deficit/PE. Land surface temperature deviations standardized with air temperature were expected to have a significant correlation with the water budget factors. To do correlation analyses on a weekly basis, daily MODIS data were integrated into three different types of weekly composites, including maximum temperature, driest-day, and combination composite data sets. Results showed that the maximum composite data set had the highest, and the driest-day composite had the lowest, correlation with the climatic water budget on average. Percent soil moisture, AE/PE, and Def/PE consistently had a high correlation with the LST deviation, whereas water deficit values showed inconsistent relationships from place to place. Time-integrated, or cumulative values of the LST-meanTair showed even stronger relationships with the water budget factors, increasing the correlation coefficients by 33.4% on average. The absolute values of their correlation coefficients ranged from 0.618 to 0.823.
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Sunyurp Park, Sunyurp Park, Johannes J. Feddema, Johannes J. Feddema, Stephen L. Egbert, Stephen L. Egbert, } "MODIS land surface temperatures and their relationship with hydroclimatological parameters", Proc. SPIE 4710, Thermosense XXIV, (15 March 2002); doi: 10.1117/12.459565; https://doi.org/10.1117/12.459565
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