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Landsat 8 LST <br />March 21, ‘15) <br />Willcox, AZ <br /> <br />(1) Emitted radiation from earth <br />is a function of its surface <br />temperature and emissivity <br />(2) Evaporative cooling lowers the <br />surface temperature <br /> <br />(3) Cold surface ET (irrigated crop) <br />is close to potential (maximum) <br /> <br />(4) dry-bare surface can be +20oC <br /> higher than wet-vegetated surface <br />LST and Evaporative Cooling