Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal de Minas Gerais (UFMG)-
Autor(es): dc.contributorUniversidade de Brasília (UnB)-
Autor(es): dc.contributorThe Geological Survey of Brazil (CPRM-SGB)-
Autor(es): dc.contributorUniversity of Texas at Arlington-
Autor(es): dc.contributorUniversidad Nacional-
Autor(es): dc.creatorSantos, Vinícius dos-
Autor(es): dc.creatorFleming, Peter Marshall-
Autor(es): dc.creatorMancini, Luís Henrique-
Autor(es): dc.creatorCota, Stela Dalva Santos-
Autor(es): dc.creatorLima, Graziele Beatriz de-
Autor(es): dc.creatorGomes, Rafaela Rodrigues-
Autor(es): dc.creatorKirchheim, Roberto Eduardo-
Autor(es): dc.creatorSanchéz-Murillo, Ricardo-
Autor(es): dc.creatorGastmans, Didier-
Data de aceite: dc.date.accessioned2025-08-21T20:27:01Z-
Data de disponibilização: dc.date.available2025-08-21T20:27:01Z-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2023-03-01-
Data de envio: dc.date.issued2022-10-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s00376-022-1367-0-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/240041-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/240041-
Descrição: dc.descriptionPrecipitation isotope ratios (O and H) record the history of water phase transitions and fractionation processes during moisture transport and rainfall formation. Here, we evaluated the isotopic composition of precipitation over the central-southeastern region of Brazil at different timescales. Monthly isotopic compositions were associated with classical effects (rainfall amount, seasonality, and continentality), demonstrating the importance of vapor recirculation processes and different regional atmospheric systems (South American Convergence Zone-SACZ and Cold Fronts-CF). While moisture recycling and regional atmospheric processes may also be observed on a daily timescale, classical effects such as the amount effect were not strongly correlated (δ18O-precipitation rate r ≼ −0.37). Daily variability revealed specific climatic features, such as δ18O depleted values (∼6‰ to −8‰) during the wet season were associated with strong convective activity and large moisture availability. Daily isotopic analysis revealed the role of different moisture sources and transport effects. Isotope ratios combined with d-excess explain how atmospheric recirculation processes interact with convective activity during rainfall formation processes. Our findings provide a new understanding of rainfall sampling timescales and highlight the importance of water isotopes to decipher key hydrometeorological processes in a complex spatial and temporal context in central-southeastern Brazil.-
Descrição: dc.descriptionSão Paulo State University (UNESP), Environmental Studies Center. Av. 24ABased, 1515 - Bela Vista, SP-
Descrição: dc.descriptionCenter for the Development of the Nuclear Technology (CDTN - CNEN), Av. Presidente Antônio Carlos, 6.627, Campus da UFMG - Pampulha, MG-
Descrição: dc.descriptionUniversidade de Brasília - UnB Instituto de Geociências Laboratório de Isótopos Estáveis, Campus “Darcy Ribeiro”, Asa Norte, DF-
Descrição: dc.descriptionHydrology and Territorial Management Directory (DHT) The Geological Survey of Brazil (CPRM-SGB), SP-
Descrição: dc.descriptionEarth and Environmental Sciences Department University of Texas at Arlington, 500 Yates Street-
Descrição: dc.descriptionStable Isotopes Research Group and Water Resources Management Laboratory Universidad Nacional-
Descrição: dc.descriptionSão Paulo State University (UNESP), Environmental Studies Center. Av. 24ABased, 1515 - Bela Vista, SP-
Formato: dc.format1693-1708-
Idioma: dc.languageen-
Relação: dc.relationAdvances in Atmospheric Sciences-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectd-excess-
Palavras-chave: dc.subjectmoisture source and transport-
Palavras-chave: dc.subjectprecipitation-
Palavras-chave: dc.subjectsouthern Atlantic Ocean and Amazon-
Palavras-chave: dc.subjectstable water isotopes-
Título: dc.titleDistinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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