ABSTRACT
Directional radiometric surface temperature, T R(φ), from a zenith view angle φ has been used to estimate surface sensible heat flux with varying degrees of success (Kustas and Norman 1996). The use of T R(φ) frequently involves the controversial assumption that it is equivalent to the so-called “aerodynamic temperature,” T 0, of the surface. T 0 is the temperature that satisfies the bulk transport expression having the form () https://www.w3.org/1998/Math/MathML"> H = ρ C p ( T 0 − T A ) R A + R EX = ρ C p ( T 0 − T A ) R AH https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429210518/e5ac3155-8fee-4a30-88f4-e5898b497747/content/eq135.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
