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Título: | Atmospheric evaporative demand observations, estimates and driving factors in Spain (1961-2011) |
Autor: | Azorín-Molina, César CSIC ORCID; Vicente Serrano, Sergio M. CSIC ORCID ; Sánchez-Lorenzo, Arturo CSIC ORCID ; McVicar, Tim R.; Morán-Tejeda, Enrique CSIC ORCID CVN; Revuelto, Jesús CSIC ORCID; El Kenawy, Ahmed M. CSIC ORCID ; Martín-Hernández, Natalia CSIC; Tomás-Burguera, Miquel CSIC ORCID | Palabras clave: | Spain Driving factors Evaporation estimations Piché and Pan observations |
Fecha de publicación: | 2015 | Editor: | Elsevier | Citación: | Journal of Hydrology 523: 262- 277 (2015) | Resumen: | We analyzed the spatio-temporal evolution of evaporation observations from Piché atmometers (1961-2011; 56 stations) and Pan evaporimeters (1984-2011; 21 stations) across Spain, and compared both measurements with evaporation estimates obtained by four physical models: i.e., Food and Agricultural Organization-56 Penman-Monteith, Food and Agricultural Organization-Pan, PenPan and Penman, based on climate data. In this study we observed a positive and statistically significant correlation between Piché and Pan evaporation measurements during the common period (1984-2011; 19 stations), mainly in summer. When evaporation observations and estimates were compared, we detected positive and statistically significant correlations with the four methods, except for winter. Among the four physical models, the FAO-Pan showed the best fitting to both Piché and Pan evaporation measurements; the PenPan model overestimated evaporation rates; and the FAO-Penman-Monteith and Penman methods underestimated evaporation observations. We also observed a better spatial agreement between Pan evaporation and estimates than that obtained by Piché measurements. Annual and seasonal trends of evaporation estimates show a statistically significant increase for 1961-2011, which do not agree with long-term Piché evaporation trends; e.g. a discontinuity was found around the 1980s. Radiative and aerodynamic driving factors suggest that this discontinuity, and the observed evaporation trends across Spain could be associated with the abrupt increase in air temperature observed during last few decades (i.e., global warming). Further investigations using available Piché evaporation observations for other regions are needed to better understand physical components influencing long-term trends of evaporation. © 2015 Elsevier B.V. | Versión del editor: | http://dx.doi.org/10.1016/j.jhydrol.2015.01.046 | URI: | http://hdl.handle.net/10261/112888 | DOI: | 10.1016/j.jhydrol.2015.01.046 | Identificadores: | doi: 10.1016/j.jhydrol.2015.01.046 issn: 0022-1694 e-issn: 1879-2707 |
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