Articles | Volume 14, issue 1
https://doi.org/10.5194/essd-14-163-2022
https://doi.org/10.5194/essd-14-163-2022
Data description paper
 | 
20 Jan 2022
Data description paper |  | 20 Jan 2022

Correcting Thornthwaite potential evapotranspiration using a global grid of local coefficients to support temperature-based estimations of reference evapotranspiration and aridity indices

Vassilis Aschonitis, Dimos Touloumidis, Marie-Claire ten Veldhuis, and Miriam Coenders-Gerrits

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Cited articles

Allen, R., Pereira, L., Raes, D., and Smith, M.: Crop evapotranspiration – Guidelines for computing crop water requirements-FAO Irrigation and drainage paper 56, FAO – Food and Agriculture Organization of the United Nations, Rome, Italy, available at: http://www.fao.org/3/X0490E/x0490e00.htm#Contents (last access: 1 April 2020), 1998. 
Allen, R. G., Walter, I. A., Elliott, R., Howell, T., Itenfisu, D., Jensen, M., and Snyder, R. L.: The ASCE Standardized Reference Evapotranspiration Equation, American Society of Civil Engineers, Idaho, https://doi.org/10.1061/9780784408056, 2005. 
Almorox, J., Quej, V. H., and Martí, P.: Global performance ranking of temperature-based approaches for evapotranspiration estimation considering Köppen climate classes, J. Hydrol., 528, 514–522, https://doi.org/10.1016/j.jhydrol.2015.06.057, 2015. 
Asadi Zarch, M. A., Sivakumar, B., and Sharma, A.: Assessment of global aridity change, J. Hydrol., 520, 300–313, https://doi.org/10.1016/j.jhydrol.2014.11.033, 2015. 
Aschonitis, V. G., Papamichail, D., Demertzi, K., Colombani, N., Mastrocicco, M., Ghirardini, A., Castaldelli, G., and Fano, E.-A.: High-resolution global grids of revised Priestley–Taylor and Hargreaves–Samani coefficients for assessing ASCE-standardized reference crop evapotranspiration and solar radiation, Earth Syst. Sci. Data, 9, 615–638, https://doi.org/10.5194/essd-9-615-2017, 2017. 
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Short summary
This work provides a global database of correction coefficients for improving the performance of the temperature-based Thornthwaite potential evapotranspiration formula and aridity indices (e.g., UNEP, Thornthwaite) that make use of this formula. The coefficients were produced using as a benchmark the ASCE-standardized reference evapotranspiration formula (formerly FAO-56) that requires temperature, solar radiation, wind speed, and relative humidity data.
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