Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization
Accurate monthly evapotranspiration (ET) estimation is essential for many forest, climate, and hydrological applications, as well as for some agricultural uses. In this study, the relationship between ET and relative evapotranspiration (F) using land surface, and atmospheric variables was assessed w...
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Universitat Politècnica de València
2024-01-01
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| Series: | Revista de Teledetección |
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| Online Access: | https://polipapers.upv.es/index.php/raet/article/view/20158 |
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| author | Elisabet Walker Virginia Venturini |
| author_facet | Elisabet Walker Virginia Venturini |
| author_sort | Elisabet Walker |
| collection | DOAJ |
| description | Accurate monthly evapotranspiration (ET) estimation is essential for many forest, climate, and hydrological applications, as well as for some agricultural uses. In this study, the relationship between ET and relative evapotranspiration (F) using land surface, and atmospheric variables was assessed with 17 FLUXNET sites data in savanna, cropland, and forest land covers, distributed all over the world. A sigmoid (Fs) and a logarithmic (Fl) F expression were included in Walker et al.’s (2019a,b) equations to evaluate their impact on the accuracy of ET estimations. The new parameterizations of ET outperformed the original expression, showing root mean square errors lower than 24% of the mean observed ET. The results presented here suggest that atmospheric parameters, coupled with land explanatory variables included in F estimates, produce more precise ET estimations. In addition, Soil Moisture Active Passive (SMAP) products were used to obtain global maps of ET and compared with Global Landsurface Evaporation Amsterdam Methodology (GLEAM) and Terra Moderate Resolution Imaging Spectroradiometer (MODIS) MOD16 products, displaying the flexibility of these new parametrizations with different sources of data. |
| format | Article |
| id | doaj-art-2356bbd806734644ad5a253f357b9620 |
| institution | Kabale University |
| issn | 1133-0953 1988-8740 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Universitat Politècnica de València |
| record_format | Article |
| series | Revista de Teledetección |
| spelling | doaj-art-2356bbd806734644ad5a253f357b96202025-02-03T10:22:33ZengUniversitat Politècnica de ValènciaRevista de Teledetección1133-09531988-87402024-01-0163657710.4995/raet.2024.2015819351Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterizationElisabet Walker0https://orcid.org/0000-0002-4287-4828Virginia Venturini1https://orcid.org/0000-0003-3040-9918National University of the Littoral Consejo Nacional de Investigaciones Científicas y Técnicas Accurate monthly evapotranspiration (ET) estimation is essential for many forest, climate, and hydrological applications, as well as for some agricultural uses. In this study, the relationship between ET and relative evapotranspiration (F) using land surface, and atmospheric variables was assessed with 17 FLUXNET sites data in savanna, cropland, and forest land covers, distributed all over the world. A sigmoid (Fs) and a logarithmic (Fl) F expression were included in Walker et al.’s (2019a,b) equations to evaluate their impact on the accuracy of ET estimations. The new parameterizations of ET outperformed the original expression, showing root mean square errors lower than 24% of the mean observed ET. The results presented here suggest that atmospheric parameters, coupled with land explanatory variables included in F estimates, produce more precise ET estimations. In addition, Soil Moisture Active Passive (SMAP) products were used to obtain global maps of ET and compared with Global Landsurface Evaporation Amsterdam Methodology (GLEAM) and Terra Moderate Resolution Imaging Spectroradiometer (MODIS) MOD16 products, displaying the flexibility of these new parametrizations with different sources of data.https://polipapers.upv.es/index.php/raet/article/view/20158evapotranspirationland coversatmospheric variablessoil moisturerelative evapotranspiration |
| spellingShingle | Elisabet Walker Virginia Venturini Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization Revista de Teledetección evapotranspiration land covers atmospheric variables soil moisture relative evapotranspiration |
| title | Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| title_full | Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| title_fullStr | Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| title_full_unstemmed | Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| title_short | Improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| title_sort | improving the evapotranspiration estimation by coupling soil moisture and atmospheric variables in the relative evapotranspiration parameterization |
| topic | evapotranspiration land covers atmospheric variables soil moisture relative evapotranspiration |
| url | https://polipapers.upv.es/index.php/raet/article/view/20158 |
| work_keys_str_mv | AT elisabetwalker improvingtheevapotranspirationestimationbycouplingsoilmoistureandatmosphericvariablesintherelativeevapotranspirationparameterization AT virginiaventurini improvingtheevapotranspirationestimationbycouplingsoilmoistureandatmosphericvariablesintherelativeevapotranspirationparameterization |