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Title

Recent changes and drivers of the atmospheric evaporative demand in the Canary Islands

AuthorsVicente-Serrano, Sergio M.; Azorín-Molina, César ; Sánchez-Lorenzo, Arturo ; El Kenawy, Ahmed; Martín-Hernández, Natalia; Peña-Gallardo, Marina; Beguería, Santiago ; Tomás-Burguera, Miquel
Issue Date2016
PublisherEuropean Geosciences Union
CitationVicente-Serrano SM, Azorin-Molina C, Sanchez-Lorenzo A, El Kenawy A, Martín-Hernández N, Peña-Gallardo M, Beguería S, Tomás-Burguera, M. Recent changes and drivers of the atmospheric evaporative demand in the Canary Islands. Hydrology and Earth System Sciences 20: 3393–3410 (2016)
AbstractWe analysed recent evolution and meteorological drivers of the atmospheric evaporative demand (AED) in the Canary Islands for the period 1961–2013.We employed long and high-quality time series of meteorological variables to analyse current AED changes in this region and found that AED has increased during the investigated period. Overall, the annual ETo, which was estimated by means of the FAO- 56 Penman–Monteith equation, increased significantly by 18.2mmdecade1 on average, with a stronger trend in summer (6.7mmdecade1). In this study we analysed the contribution of (i) the aerodynamic (related to the water vapour that a parcel of air can store) and (ii) radiative (related to the available energy to evaporate a quantity of water) components to the decadal variability and trends of ETo. More than 90% of the observed ETo variability at the seasonal and annual scales can be associated with the variability in the aerodynamic component. The variable that recorded more significant changes in the Canary Islands was relative humidity, and among the different meteorological factors used to calculate ETo, relative humidity was the main driver of the observed ETo trends. The observed trend could have negative consequences in a number of water-depending sectors if it continues in the future.
Description18 Pags.- 8 Tabls.- 9 Figs.
Publisher version (URL)http://dx.doi.org/10.5194/hess-20-3393-2016
URIhttp://hdl.handle.net/10261/136861
DOI10.5194/hess-20-3393-2016
ISSN1027-5606
E-ISSN1607-7938
Appears in Collections:(EEAD) Artículos
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