1. Global data for reference crop evapotranspiration and solar radiation parameters for the period 1950-2000 (last update 21/11/2016)
*Citation: Aschonitis, V.G., Papamichail, D., Demertzi, K., Colombani, N., Mastrocicco, M., Ghirardini, A., Castaldelli, G., Fano, E.A., (2016) High resolution global grids of revised Priestley-Taylor and Hargreaves-Samani coefficients for assessing ASCE-standardized reference crop evapotranspiration and solar radiation. (under review)
Table of Contents
The given size of files in the folllowing archive corresponds to zipped files while the real size is at least 10 times larger. Do not download multiple files simultaneously because the files may not be downloaded correctly. The data are provided in ESRI-grid format at five resolutions (30 arc-sec, 2.5 arc-min, 5 arc-min, 10 arc-min and 0.5 deg). The complete datasets are also available in PANGAEA database (https://doi.pangaea.de/10.1594/PANGAEA.868808)
Parameter |
30 arc-sec |
2.5 arc-min |
5 arc-min |
10 arc-min |
0.5 deg |
1. Mean monthly ASCE-ETo for short reference crop (clipped grass) |
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2. Mean monthly ASCE-ETo for tall reference crop (alfalfa) |
4.4 MB |
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3. Re-adjusted Hargreaves-Samani coefficient for short ref.crop ETo (rescaled x100,000) |
0.07 MB |
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4. Re-adjusted Hargreaves-Samani coefficient for tall ref.crop ETo (rescaled x100,000) |
6.4 MB |
0.08 MB |
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5. Expected Mean Annual Difference/Error (MAD%) between original Hargreaves-Samani ETo and ASCE-ETo for short ref.crop |
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6. Re-adjusted coefficient for solar radiation formula of Hargreaves-Samani (rescaled x1000) |
0.05 MB |
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7. Expected Mean Annual Difference/Error (MAD%) between original Hargreaves-Samani radiation formula versus solar radiation data |
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8. Re-adjusted Priestley-Taylor coefficient for short ref.crop ETo (rescaled x100) |
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9. Re-adjusted Priestley-Taylor coefficient for tall ref.crop ETo (rescaled x100) |
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10. Expected Mean Annual Difference/Error (MAD%) between original Priestley-Taylor ETo and ASCE-ETo for short ref.crop |
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11. Hargeaves-Samani versus Priestley-Taylor prevalence (comparison between original methods versus ASCE-short) (DMADhp) |
Visualization of the five resolutions using as example Tasmania
All data are freely available without registration and can be used for scientific and educational purposes. In the case of commercial use, the users should contact ESRN - database administrators. Users should acknowledge the ESRN Database (esrn-database.org) and the respective citation (e.g. scientific article, report) that follows each dataset.