Thermal scanner measurement of canopy temperatures to estimate evapotranspiration

Heilman, J.L. and Kanemasu, E.T. and Rosenberg, N.J. and Blad , B.L. (1976) Thermal scanner measurement of canopy temperatures to estimate evapotranspiration. Remote Sensing of Environment, 5 (2). pp. 137-145.

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In July-Aug. 1974, temperatures of soyabean, sorghum and Panicum miliaceum, grown in fields at Manhattan, Kansas, and Mead and Scottsbluff, Nebraska, were measured with a thermal scanner flown at altitudes of 610 or 1220 m and were used in a resistance form of the energy-balance equation to estimate evapotranspiration (Et). Equivalent black-body temperatures measured at 610 and 1220 m were 2-6 deg C lower than leaf surface temperatures measured by thermocouples. A correction procedure relating temperature error to atmospheric precipitable water was applied to the scanner measurements. Estimates of Et using the corrected temperatures differed from lysimetric measurements by from -0.4 to 0.17 ly/min

Item Type: Article
Author Affiliation: Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA
Subjects: Plant Protection
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 16 Jul 2012 05:25
Last Modified: 16 Jul 2012 05:25
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