Contribution of precipitation and reference evapotranspiration to drought indices under different climates

In this study we analyzed the sensitivity of four drought indices to precipitation (P) and reference evapotranspiration (ETo) inputs. The four drought indices are the Palmer Drought Severity Index (PDSI), the Reconnaissance Drought Index (RDI), the Standardized Precipitation Evapotranspiration Index...

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Autores: Vicente Serrano, Sergio M., Schrier, G. van der, Beguería, Santiago, Azorín-Molina, César, López-Moreno, Juan I.
Tipo de documento: artigo
Data de publicação:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/115178
Acesso em linha:http://hdl.handle.net/10261/115178
Access Level:Acceso aberto
Palavra-chave:Global warming
Evaporation
Standardized Palmer Drought Index
Reconnaissance Drought Index
Standardized Precipitation Evapotranspiration Index
Palmer Drought Severity Index
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spelling Contribution of precipitation and reference evapotranspiration to drought indices under different climatesVicente Serrano, Sergio M.Schrier, G. van derBeguería, SantiagoAzorín-Molina, CésarLópez-Moreno, Juan I.Global warmingEvaporationStandardized Palmer Drought IndexReconnaissance Drought IndexStandardized Precipitation Evapotranspiration IndexPalmer Drought Severity IndexIn this study we analyzed the sensitivity of four drought indices to precipitation (P) and reference evapotranspiration (ETo) inputs. The four drought indices are the Palmer Drought Severity Index (PDSI), the Reconnaissance Drought Index (RDI), the Standardized Precipitation Evapotranspiration Index (SPEI) and the Standardized Palmer Drought Index (SPDI). The analysis uses long-term simulated series with varying averages and variances, as well as global observational data to assess the sensitivity to real climatic conditions in different regions of the World. The results show differences in the sensitivity to ETo and P among the four drought indices. The PDSI shows the lowest sensitivity to variation in their climate inputs, probably as a consequence of the standardization procedure of soil water budget anomalies. The RDI is only sensitive to the variance but not to the average of P and ETo. The SPEI shows the largest sensitivity to ETo variation, with clear geographic patterns mainly controlled by aridity. The low sensitivity of the PDSI to ETo makes the PDSI perhaps less apt as the suitable drought index in applications in which the changes in ETo are most relevant. On the contrary, the SPEI shows equal sensitivity to P and ETo. It works as a perfect supply and demand system modulated by the average and standard deviation of each series and combines the sensitivity of the series to changes in magnitude and variance. Our results are a robust assessment of the sensitivity of drought indices to P and ETo variation, and provide advice on the use of drought indices to detect climate change impacts on drought severity under a wide variety of climatic conditions. © 2014 Elsevier B.V.This work has been supported by research project CGL2011-27574-CO2-02 financed by the Spanish Commission of Science and Technology and FEDER and “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. C. A-M was supported by the JCI-2011-10263 postdoctoral fellowship by the Spanish Government.Peer ReviewedElsevier2015201520152015info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/115178reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.jhydrol.2014.11.025info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1151782026-05-22T06:33:51Z
dc.title.none.fl_str_mv Contribution of precipitation and reference evapotranspiration to drought indices under different climates
title Contribution of precipitation and reference evapotranspiration to drought indices under different climates
spellingShingle Contribution of precipitation and reference evapotranspiration to drought indices under different climates
Vicente Serrano, Sergio M.
Global warming
Evaporation
Standardized Palmer Drought Index
Reconnaissance Drought Index
Standardized Precipitation Evapotranspiration Index
Palmer Drought Severity Index
title_short Contribution of precipitation and reference evapotranspiration to drought indices under different climates
title_full Contribution of precipitation and reference evapotranspiration to drought indices under different climates
title_fullStr Contribution of precipitation and reference evapotranspiration to drought indices under different climates
title_full_unstemmed Contribution of precipitation and reference evapotranspiration to drought indices under different climates
title_sort Contribution of precipitation and reference evapotranspiration to drought indices under different climates
dc.creator.none.fl_str_mv Vicente Serrano, Sergio M.
Schrier, G. van der
Beguería, Santiago
Azorín-Molina, César
López-Moreno, Juan I.
author Vicente Serrano, Sergio M.
author_facet Vicente Serrano, Sergio M.
Schrier, G. van der
Beguería, Santiago
Azorín-Molina, César
López-Moreno, Juan I.
author_role author
author2 Schrier, G. van der
Beguería, Santiago
Azorín-Molina, César
López-Moreno, Juan I.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Global warming
Evaporation
Standardized Palmer Drought Index
Reconnaissance Drought Index
Standardized Precipitation Evapotranspiration Index
Palmer Drought Severity Index
topic Global warming
Evaporation
Standardized Palmer Drought Index
Reconnaissance Drought Index
Standardized Precipitation Evapotranspiration Index
Palmer Drought Severity Index
description In this study we analyzed the sensitivity of four drought indices to precipitation (P) and reference evapotranspiration (ETo) inputs. The four drought indices are the Palmer Drought Severity Index (PDSI), the Reconnaissance Drought Index (RDI), the Standardized Precipitation Evapotranspiration Index (SPEI) and the Standardized Palmer Drought Index (SPDI). The analysis uses long-term simulated series with varying averages and variances, as well as global observational data to assess the sensitivity to real climatic conditions in different regions of the World. The results show differences in the sensitivity to ETo and P among the four drought indices. The PDSI shows the lowest sensitivity to variation in their climate inputs, probably as a consequence of the standardization procedure of soil water budget anomalies. The RDI is only sensitive to the variance but not to the average of P and ETo. The SPEI shows the largest sensitivity to ETo variation, with clear geographic patterns mainly controlled by aridity. The low sensitivity of the PDSI to ETo makes the PDSI perhaps less apt as the suitable drought index in applications in which the changes in ETo are most relevant. On the contrary, the SPEI shows equal sensitivity to P and ETo. It works as a perfect supply and demand system modulated by the average and standard deviation of each series and combines the sensitivity of the series to changes in magnitude and variance. Our results are a robust assessment of the sensitivity of drought indices to P and ETo variation, and provide advice on the use of drought indices to detect climate change impacts on drought severity under a wide variety of climatic conditions. © 2014 Elsevier B.V.
publishDate 2015
dc.date.none.fl_str_mv 2015
2015
2015
2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/115178
url http://hdl.handle.net/10261/115178
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.jhydrol.2014.11.025
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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