Articles | Volume 20, issue 3
Research article
21 Mar 2016
Research article |  | 21 Mar 2016

Creating long-term gridded fields of reference evapotranspiration in Alpine terrain based on a recalibrated Hargreaves method

Klaus Haslinger and Annett Bartsch

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Cited articles

Aguilar, C. and Polo, M. J.: Generating reference evapotranspiration surfaces from the Hargreavesn equation at watershed scale, Hydrol. Earth Syst. Sci., 15, 2495–2508,, 2011.
Allen, R. G., Pereira, L. S., Raes, D., and Smith, M.: Crop evapotranspiration – Guidelines for computing crop water requirements, FAO Irrigation and drainage paper 56, Rome, 15 pp., 1998.
Bautista, F., Bautista, D., and Delgado-Carranza, C.: Calibrating the equations of Hargreaves and Thornthwaite to estimate the potential evapotranspiration in semi-arid and subhumid tropical climates for regional applications, Atmósfera, 22, 331–348, 2009.
Bindi, M. and Miglietta, F.: Estimating daily global radiation from air temperature and rainfall measurements, Climatic Change, 1, 117–124, 1991.
Bormann, H.: Sensitivity analysis of 18 different potential evapotranspiration models to observed climatic change at German climate stations, Climatic Change, 104, 729–753, 2011.
Short summary
Gridded fields of daily max. and min. temperatures for the Austrian domain are used to calculate ET0 based on a re-calibrated Hargreaves method. Newly derived, station-based calibration parameters, with Penman–Monteith ET0 as a reference, show a distinct altitude and seasonal dependence. Theses features are used to interpolate the new calibration values in space and time onto the temperature grids. The ET0 is then calculated based on the entire gridded temperature data starting back in 1961.