Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 28, issue 18
Articles | Volume 28, issue 18
https://doi.org/10.5194/hess-28-4349-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-28-4349-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 28, issue 18
Research article
 | 
23 Sep 2024
Research article |  | 23 Sep 2024

Estimating the sensitivity of the Priestley–Taylor coefficient to air temperature and humidity

Ziwei Liu, Hanbo Yang, Changming Li, and Taihua Wang

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Short summary
The determination of the coefficient α in the Priestley–Taylor equation is empirical. Based on an atmospheric boundary layer model, we derived a physically clear and parameter-free expression to investigate the behavior of α. We showed that the temperature dominates changes in α and emphasized that the variation of α with temperature should be considered for long-term hydrological predictions. Our works advance and promote the most classical models in the field.
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