A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI

We propose a new climatic drought index: the Standardized Precipitation Evapotranspiration Index (SPEI). The SPEI is based on precipitation and temperature data, and has the advantage of combining a multi-scalar character with the capacity to include the effects of temperature variability on drought...

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Detalhes bibliográficos
Autores: Vicente Serrano, Sergio M., Beguería, Santiago, López-Moreno, Juan I.
Formato: artículo
Fecha de publicación:2010
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/22405
Acesso em linha:http://hdl.handle.net/10261/22405
Access Level:acceso abierto
Palavra-chave:Drought
Drought index
Log-logistic distribution
Global warming
Standardized Precipitation Index
Palmer Drought Severity Index
Precipitation
Evapotranspiration
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spelling A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEIVicente Serrano, Sergio M.Beguería, SantiagoLópez-Moreno, Juan I.DroughtDrought indexLog-logistic distributionGlobal warmingStandardized Precipitation IndexPalmer Drought Severity IndexPrecipitationEvapotranspirationWe propose a new climatic drought index: the Standardized Precipitation Evapotranspiration Index (SPEI). The SPEI is based on precipitation and temperature data, and has the advantage of combining a multi-scalar character with the capacity to include the effects of temperature variability on drought assessment. The procedure to calculate the index is detailed, and involves a climatic water balance, the accumulation of deficit/surplus at different time scales, and adjustment to a Log-logistic probability distribution. Mathematically, the SPEI is similar to the Standardized Precipitation Index (SPI), but includes the role of temperature. As the SPEI is based on a water balance, it can be compared to the self-calibrated Palmer Drought Severity Index (sc-PDSI). We compared time series of the three indices for a set of observatories with different climate characteristics, located in different parts of the world. Under global warming conditions only the sc-PDSI and SPEI identified an increase in drought severity associated with higher water demand due to evapotranspiration. Relative to the sc-PDSI, the SPEI has the advantage of being multi-scalar, which is crucial for drought analysis and monitoring.This work has been supported by the research projects CGL2006-11619/HID, CGL2008- 01189/BTE, and CGL2008-1083/CLI financed by the Spanish Commission of Science and Technology and FEDER, EUROGEOSS (FP7-ENV-2008-1-226487) and ACQWA (FP7- ENV-2007-1-212250) financed by the VII Framework Programme of the European Commission, “Las sequías climáticas en la cuenca del Ebro y su respuesta hidrológica” and “La nieve en el Pirineo Aragonés: distribución espacial y su respuesta a las condiciones climáticas” Financed by “Obra Social La Caixa” and the Aragón Government and the “Programa de grupos de investigación consolidados” financed by the Aragón Government.ÿPeer reviewedAmerican Meteorological Society201020102010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65019389607 bytesapplication/pdfhttp://hdl.handle.net/10261/22405reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/EC/FP7/226487http://dx.doi.org/10.1175/2009JCLI2909.1info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/224052026-05-22T06:33:51Z
dc.title.none.fl_str_mv A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
title A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
spellingShingle A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
Vicente Serrano, Sergio M.
Drought
Drought index
Log-logistic distribution
Global warming
Standardized Precipitation Index
Palmer Drought Severity Index
Precipitation
Evapotranspiration
title_short A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
title_full A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
title_fullStr A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
title_full_unstemmed A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
title_sort A multi-scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index – SPEI
dc.creator.none.fl_str_mv Vicente Serrano, Sergio M.
Beguería, Santiago
López-Moreno, Juan I.
author Vicente Serrano, Sergio M.
author_facet Vicente Serrano, Sergio M.
Beguería, Santiago
López-Moreno, Juan I.
author_role author
author2 Beguería, Santiago
López-Moreno, Juan I.
author2_role author
author
dc.subject.none.fl_str_mv Drought
Drought index
Log-logistic distribution
Global warming
Standardized Precipitation Index
Palmer Drought Severity Index
Precipitation
Evapotranspiration
topic Drought
Drought index
Log-logistic distribution
Global warming
Standardized Precipitation Index
Palmer Drought Severity Index
Precipitation
Evapotranspiration
description We propose a new climatic drought index: the Standardized Precipitation Evapotranspiration Index (SPEI). The SPEI is based on precipitation and temperature data, and has the advantage of combining a multi-scalar character with the capacity to include the effects of temperature variability on drought assessment. The procedure to calculate the index is detailed, and involves a climatic water balance, the accumulation of deficit/surplus at different time scales, and adjustment to a Log-logistic probability distribution. Mathematically, the SPEI is similar to the Standardized Precipitation Index (SPI), but includes the role of temperature. As the SPEI is based on a water balance, it can be compared to the self-calibrated Palmer Drought Severity Index (sc-PDSI). We compared time series of the three indices for a set of observatories with different climate characteristics, located in different parts of the world. Under global warming conditions only the sc-PDSI and SPEI identified an increase in drought severity associated with higher water demand due to evapotranspiration. Relative to the sc-PDSI, the SPEI has the advantage of being multi-scalar, which is crucial for drought analysis and monitoring.
publishDate 2010
dc.date.none.fl_str_mv 2010
2010
2010
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/10261/22405
url http://hdl.handle.net/10261/22405
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/226487
http://dx.doi.org/10.1175/2009JCLI2909.1
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 9389607 bytes
application/pdf
dc.publisher.none.fl_str_mv American Meteorological Society
publisher.none.fl_str_mv American Meteorological Society
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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