An analytical framework for extrapolating evaporation measurements by remote sensing surface temperature

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Abstract
By relating horizontal changes in evaporation to horizontal changes in surface temperature an analytical framework is formalized, by which a point measurement of evaporation can be extrapolated from a single area of uniform vegetation to a wider area of mixed vegetation. The assumptions and simplifications implicit in this technique are examined and it is shown that the relationship between the horizontal variation in evaporation and the horizontal variation in surface temperature depends strongly on the aerodynamic transfer resistance and the horizontal variation in air temperature.