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dc.contributor.authorVicente Serrano, Sergio M.es_ES
dc.contributor.authorBeguería, Santiagoes_ES
dc.identifier.citationVicente SM, Beguería S. Comment on ‘Candidate distributions for climatological drought indices (SPI and SPEI)’ by James H. Stagge et al. International Journal of Climatology 36 (4): 2120-2131 (2016)es_ES
dc.description12 Pags.- 6 Figs.es_ES
dc.description.abstractIn opposition to the originally proposed Log-logistic distribution, Stagge et al. (2015) recommended the use of the general extreme value (GEV) distribution to calculate the standardized precipitation evapotranspiration index (SPEI). This is not an irrelevant issue, as the use of different distribution functions may lead to different SPEI values, and thus can make them not compatible with those of other users. Stagge et al. (2015) based their recommendation on the results of goodness-of-fit tests applied to climate data in Europe. Here we provide evidence that these tests do not have enough power for discriminating between very similar distribution functions. Even more, their results are not robust and depend on the data used. Other criteria based on the adaptation to the tails of the distribution and the fraction of cases with no solution are more relevant to guide the selection of the most adequate distribution. We have tested both distribution functions based on these criteria and using global gridded data of precipitation and reference evapotranspiration. Our results clearly recommend the use of the Log-logistic distribution to calculate the SPEI, as originally proposed by Vicente-Serrano et al. (2010a).es_ES
dc.description.sponsorshipThis work has been supported by the research projects CGL2011-27574-CO2-02, CGL2011-24185, CGL2014-52135-C3-1-R and ‘Red de variabilidad y cambio climático RECLIM’ (CGL2014-517221-REDT) financed by the Spanish Commission of Science and Technology and FEDER and ‘LIFE12 ENV/ES/000536-Demonstration and validation of innovative methodology for regional climate change adaptation in the Mediterranean area (LIFE MEDACC)’ financed by the LIFE programme of the European Commission.es_ES
dc.titleComment on ‘Candidate distributions for climatological drought indices (SPI and SPEI)’ by James H. Stagge et al.es_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderComisión Interministerial de Ciencia y Tecnología, CICYT (España)es_ES
dc.contributor.funderEuropean Commissiones_ES
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