Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model

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dc.contributor.authorSulca Jota, Juan Carlos
dc.contributor.authorTakahashi, Ken
dc.contributor.authorTacza, José
dc.contributor.authorEspinoza, Jhan-Carlo
dc.contributor.authorDong, Bo
dc.date.accessioned2022-10-18T11:17:22Z
dc.date.available2022-10-18T11:17:22Z
dc.date.issued2022-09-16
dc.description.abstractThe decadal variability in summer precipitation over the Central Andes (10°–30°S) is investigated from 1921 to 2010 using low-pass filtered time series of the central and eastern El Niño–Southern Oscillation (ENSO) Pacific (C and E) indices, the South Pacific Convergence Zone (SPCZ) index, the Atlantic SST indices, Atlantic Multidecadal Oscillation (AMO) index, North Atlantic Oscillation (NAO) index, and ERA-20C reanalysis. Additionally, an empirical-statistical downscaling (ESD) model was built. A rotated empirical orthogonal function (REOF) analysis shows that the first leading mode of precipitation (RPC1) represents 38.2% of the total decadal variance. RPC2, RCP3, and RPC4 represent 18.8, 12.8, and 9.7% of the total decadal variance, respectively. Furthermore, RPC1 features highest loadings over most of the region. RPC2 features a dipole of highest loadings over the southernmost Bolivian Altiplano and lowest loadings over the northwestern Argentinian Andes. Conversely, RPC3 presents highest loadings over the eastern-central Bolivian Altiplano and northwestern Argentinian Andes. RPC4 features highest loadings over the southern Bolivian Andes. RPC1 and RPC3 wet summers are associated with moisture transport from the Amazon basin, but RPC1 features the strengthening upper-level Bolivian high-Nordeste low system over South America. Conversely, RPC2 and RPC4 wet summers are associated with local processes induced by southward displacement of the South Atlantic Convergence Zone and warm sea surface temperature (SST) anomalies over the Indian Ocean, respectively. According to the ESD model, the decadal variability in the central and eastern Pacific (CP and EP) and Atlantic Ocean reproduces the decadal component of the DJF precipitation over most of the Central Andes.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationSulca, J., Takahashi, K., Tacza, J., Espinoza, J-C., Dong, B. (2022). Decadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling model.==$International Journal of Climatology.$==https://doi.org/10.1002/joc.7867es_ES
dc.identifier.doihttps://doi.org/10.1002/joc.7867es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalInternational Journal of Climatologyes_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/5312
dc.language.isoenges_ES
dc.publisherRoyal Meteorological Societyes_ES
dc.relation.ispartofurn:issn:1097-0088
dc.rightsinfo:eu-repo/semantics/closedAccesses_ES
dc.subjectAtlantic Oceanes_ES
dc.subjectCentral and eastern ENSOes_ES
dc.subjectCentral Andeses_ES
dc.subjectDecadal variabilityes_ES
dc.subjectEmpirical-statistical downscaling modeles_ES
dc.subjectSACZes_ES
dc.subject.ocdehttps://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.titleDecadal variability in the austral summer precipitation over the Central Andes: Observations and the empirical-statistical downscaling modeles_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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