Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates
<p>The Pannonian Basin Experiment (PannEx) is a Regional Hydroclimate Project (RHP) of the World Climate Research Programme (WCRP) Global Energy and Water Exchanges (GEWEX) Project. A gridded meteorological dataset is available for the PannEx region as part of the CarpatClim database, which co...
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Copernicus Publications
2020-02-01
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| Series: | Advances in Science and Research |
| Online Access: | https://www.adv-sci-res.net/16/251/2020/asr-16-251-2020.pdf |
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| author | M. Lakatos T. Weidinger L. Hoffmann Z. Bihari Á. Horváth |
| author_facet | M. Lakatos T. Weidinger L. Hoffmann Z. Bihari Á. Horváth |
| author_sort | M. Lakatos |
| collection | DOAJ |
| description | <p>The Pannonian Basin Experiment (PannEx) is a Regional Hydroclimate Project (RHP) of the World Climate Research Programme (WCRP) Global Energy and Water Exchanges (GEWEX) Project. A gridded meteorological dataset is available for the PannEx region as part of the CarpatClim database, which consists of homogenized and harmonized daily meteorological observations for several climate parameters with 0.1<span class="inline-formula"><sup>∘</sup></span> spatial resolution in the period of 1961–2010. The estimation of the Penman–Monteith reference evapotranspiration (ET<span class="inline-formula"><sub>0</sub></span>) on the daily scale was performed for the CarpatClim grid as one of the first results in the PannEx initiative. This study compares the already accessible Thornthwaite estimates of potential evapotranspiration (PET_Th) on the monthly scale to the newly derived Penman–Monteith estimates. The comparison is made on an annual and seasonal basis for the 50-year period. The distribution of both estimates is influenced by geographical location and orographic features. The annual time series are similar but the regional-average annual values of ET<span class="inline-formula"><sub>0</sub></span> are <span class="inline-formula">∼80</span> mm greater than the Thornthwaite estimate in the whole CarpatClim region. The relative bias and root mean square error was
computed as well. The classical Thornthwaite method underestimates the ET<span class="inline-formula"><sub>0</sub></span> by more than 20 % over extensive regions for selected grid points at elevations lower than 200 m in the Pannonian Basin. The slope of the fitted linear trend indicate increasing reference evapotranspiration in the Pannonian/Carpathian Basin due to climate change.</p> |
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| issn | 1992-0628 1992-0636 |
| language | English |
| last_indexed | 2024-12-10T04:48:37Z |
| publishDate | 2020-02-01 |
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| series | Advances in Science and Research |
| spelling | doaj.art-3610dc612bb649059f95a7e8f4fe55812022-12-22T02:01:40ZengCopernicus PublicationsAdvances in Science and Research1992-06281992-06362020-02-011625125910.5194/asr-16-251-2020Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimatesM. Lakatos0T. Weidinger1L. Hoffmann2Z. Bihari3Á. Horváth4Hungarian Meteorological Service, 1525 P. Box 38, Budapest, HungaryDepartment of Meteorology, Eötvös Loránd University, 1117 Pázmány Péter s. 1/A, Budapest, HungaryHungarian Meteorological Service, 1525 P. Box 38, Budapest, HungaryHungarian Meteorological Service, 1525 P. Box 38, Budapest, HungaryHungarian Meteorological Service, 1525 P. Box 38, Budapest, Hungary<p>The Pannonian Basin Experiment (PannEx) is a Regional Hydroclimate Project (RHP) of the World Climate Research Programme (WCRP) Global Energy and Water Exchanges (GEWEX) Project. A gridded meteorological dataset is available for the PannEx region as part of the CarpatClim database, which consists of homogenized and harmonized daily meteorological observations for several climate parameters with 0.1<span class="inline-formula"><sup>∘</sup></span> spatial resolution in the period of 1961–2010. The estimation of the Penman–Monteith reference evapotranspiration (ET<span class="inline-formula"><sub>0</sub></span>) on the daily scale was performed for the CarpatClim grid as one of the first results in the PannEx initiative. This study compares the already accessible Thornthwaite estimates of potential evapotranspiration (PET_Th) on the monthly scale to the newly derived Penman–Monteith estimates. The comparison is made on an annual and seasonal basis for the 50-year period. The distribution of both estimates is influenced by geographical location and orographic features. The annual time series are similar but the regional-average annual values of ET<span class="inline-formula"><sub>0</sub></span> are <span class="inline-formula">∼80</span> mm greater than the Thornthwaite estimate in the whole CarpatClim region. The relative bias and root mean square error was computed as well. The classical Thornthwaite method underestimates the ET<span class="inline-formula"><sub>0</sub></span> by more than 20 % over extensive regions for selected grid points at elevations lower than 200 m in the Pannonian Basin. The slope of the fitted linear trend indicate increasing reference evapotranspiration in the Pannonian/Carpathian Basin due to climate change.</p>https://www.adv-sci-res.net/16/251/2020/asr-16-251-2020.pdf |
| spellingShingle | M. Lakatos T. Weidinger L. Hoffmann Z. Bihari Á. Horváth Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates Advances in Science and Research |
| title | Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates |
| title_full | Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates |
| title_fullStr | Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates |
| title_full_unstemmed | Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates |
| title_short | Computation of daily Penman–Monteith reference evapotranspiration in the Carpathian Region and comparison with Thornthwaite estimates |
| title_sort | computation of daily penman monteith reference evapotranspiration in the carpathian region and comparison with thornthwaite estimates |
| url | https://www.adv-sci-res.net/16/251/2020/asr-16-251-2020.pdf |
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