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dc.creatorSánchez Murillo, Ricardo
dc.creatorDurán Quesada, Ana María
dc.creatorBirkel Dostal, Christian
dc.creatorEsquivel Hernández, Germain
dc.creatorBoll, Jan
dc.date.accessioned2018-02-14T21:49:34Z
dc.date.available2018-02-14T21:49:34Z
dc.date.issued2016
dc.identifier.issn1099-1085
dc.identifier.urihttp://hdl.handle.net/10669/74094
dc.description.abstractThe last 2014-16 El Niño event was among the three strongest episodes on record. El Niño considerably changes annual and seasonal precipitation across the tropics. Here, we present a unique stable isotope data set of daily precipitation collected in Costa Rica prior to, during, and after El Niño 2014-16, in combination with Lagrangian moisture source and precipitation anomaly diagnostics. δ2H composition ranged from -129.4 to +18.1 (‰) while δ18O ranged from -17.3 to +1.0 (‰). No significant difference was observed among δ18O (P=0.186) and δ2H (P=0.664) mean annual compositions. However, mean annual d-excess showed a significant decreasing trend (from +13.3 to +8.7 ‰) (P<0.001) with values ranging from +26.6 to -13.9 ‰ prior to and during the El Niño evolution. The latter decrease in d-excess can be partly explained by an enhanced moisture flux convergence across the southeastern Caribbean Sea coupled with moisture transport from northern South America by means of an increased Caribbean Low Level Jet regime. During 2014-15, precipitation deficit across the Pacific domain averaged 46% resulting in a very severe drought; while a 94% precipitation surplus was observed in the Caribbean domain. Understanding these regional moisture transport mechanisms during a strong El Niño event may contribute to a) better understanding of precipitation anomalies in the tropics and b) re-evaluate past stable isotope interpretations of ENSO events in paleoclimatic archives within the Central America region.es_ES
dc.description.sponsorshipInternational Atomic Energy Agency/[CRP-19747]/IAEA/Austriaes_ES
dc.description.sponsorshipUniversidad Nacional de Costa Rica/[SIA-0482-13]/UNA/Costa Ricaes_ES
dc.description.sponsorshipUniversidad Nacional de Costa Rica/[SIA-0378-14]/UNA/Costa Ricaes_ES
dc.description.sponsorshipUniversidad Nacional de Costa Rica/[SIA-0101-14]/UNA/Costa Ricaes_ES
dc.description.sponsorshipUniversidad de Costa Rica/[217-B4-239]/UCR/Costa Ricaes_ES
dc.language.isoen_USes_ES
dc.sourceHydrological Processes, Vol. 31, Núm. 4, 2016es_ES
dc.subjectCosta Ricaes_ES
dc.subjectENSOes_ES
dc.subjectd‐excesses_ES
dc.subjectMoisture transportes_ES
dc.subjectTropical precipitationes_ES
dc.subject551.55 Perturbaciones y formaciones atmosféricas
dc.titleTropical precipitation anomalies and d‐excess evolution during El Niño 2014‐16es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.typeArtículo científicoes_ES
dc.identifier.doi10.1002/hyp.11088
dc.description.procedenceUCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Básicas::Centro de Investigaciones Geofísicas (CIGEFI)es_ES
dc.identifier.codproyecto217‐B4‐239
dc.identifier.codproyecto805‐B3‐600
dc.identifier.codproyecto805‐B5‐295


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