Comparing SPI and SPEI to detect different precipitation and temperature regimes in Chile throughout the last four decades

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dc.article.number107085
dc.catalogadoryvc
dc.contributor.authorMeseguer Ruiz, Oliver
dc.contributor.authorSerrano Notivoli, Roberto
dc.contributor.authorAránguiz Acuña, Adriana
dc.contributor.authorFuentealba Landeros, María Magdalena
dc.contributor.authorNúñez Hidalgo, Ignacio
dc.contributor.authorSarricolea, Pablo
dc.contributor.authorGarreaud, René
dc.date.accessioned2024-12-27T20:27:28Z
dc.date.available2024-12-27T20:27:28Z
dc.date.issued2024
dc.description.abstractDroughts are one of the main environmental challenges facing the world this century. The latitudinal and orographic characteristics of continental Chile leads different areas within it to experience very different regimes of precipitation and temperature, resulting in a wide variation in the occurrence and severity of droughts. Using the CR2Met 5 × 5 km resolution gridded monthly dataset covering the years from 1979 to 2019, we calculated the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evaporation Index (SPEI) of March and September at 3-, 6-, 9-, 12- and 24-months to: 1) relate them with different climate modes, and 2) determine their temporal evolution. We found that the Pacific Decadal Oscillation shows low positive correlations with SPI but no significant correlations with SPEI. The Multivariate El Niño Southern Oscillation shows different correlations in northern Chile, as well as El Niño 1 + 2 and the Antarctic Oscillation, for both SPI and SPEI. Both SPI and SPEI show negative (drier) trends in the north and center of Chile, while positive (wetter) trends appear in the south. SPEI shows stronger and more significant negative trends, influenced by the overall warming of the country. Warming trends are lower on the coast, so SPI could be a good indicator for coastal areas, while SPEI could be a good indicator for inland areas. Climate modes are useful for monthly and annual predictions, and by being a good drought predictor, they can help inform key public policies. These results are expected to help Chilean decision makers dealing with the challenges facing water management in the immediate future.
dc.description.funderANID FONDECYT
dc.fuente.origenScopus
dc.identifier.doi10.1016/j.atmosres.2023.107085
dc.identifier.issn0169-8095
dc.identifier.scopusidScopus_Id: 85175711007
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/89347
dc.information.autorucInstituto de Geografía; Fuentealba Landeros, María Magdalena; S/I; 224898
dc.language.isoen
dc.nota.accesocontenido parcial
dc.publisherElsevier Ltd
dc.revistaAtmospheric Research
dc.rightsacceso restringido
dc.subjectChile
dc.subjectClimate modes
dc.subjectMegadrought
dc.subjectSPEI
dc.subjectSPI
dc.subject.ddc900
dc.subject.deweyHistoria y geografíaes_ES
dc.titleComparing SPI and SPEI to detect different precipitation and temperature regimes in Chile throughout the last four decades
dc.typeartículo
dc.volumen297
sipa.codpersvinculados224898
sipa.trazabilidadScopus;2023-11-19
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