Isotopic composition of convective rainfall in the inland tropics of Brazil

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidad de Costa Rica-
Autor(es): dc.contributorUniversity of Texas at Arlington-
Autor(es): dc.contributorAgh University of Krakow-
Autor(es): dc.contributorVienna International Centre-
Autor(es): dc.creatorDos Santos, Vinicius-
Autor(es): dc.creatorGastmans, Didier-
Autor(es): dc.creatorDurán-Quesada, Ana María-
Autor(es): dc.creatorSánchez-Murillo, Ricardo-
Autor(es): dc.creatorRozanski, Kazimierz-
Autor(es): dc.creatorKracht, Oliver-
Autor(es): dc.creatorDe Assis Quintão, Demilson-
Data de aceite: dc.date.accessioned2025-08-21T20:53:52Z-
Data de disponibilização: dc.date.available2025-08-21T20:53:52Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-06-10-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.5194/acp-24-6663-2024-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299372-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299372-
Descrição: dc.descriptionStrong convective systems characterize the tropical central-southern region of Brazil. These systems provide abundant water supply for agroindustrial activities and pose flood risks to large cities. Here, we present high-frequency (2-10 min; inter- and intra-event) rainfall isotopic compositions (n D 90 samples) to reveal regional and local atmospheric processes controlling the isotopic variability of convective systems between 2019-2021. Inter-event rainfall weighted-average (dwgd) values were low (d18Owgd = -10.0%) due to the higher rainfall along the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model trajectories from the Amazon forest during the summer. In contrast, during autumn and spring seasons HYSPLIT model trajectories from the Atlantic Ocean and southern Brazil exhibited lower rainfall amounts, resulting in high d18Owgd = -4.2%. This strong regional dwgd pattern often masks intra-event isotopic variability. Therefore, we analyzed the vertical structure of local rainfall using reflectivity (Z) from microradar data. Variations in Z indicate that microphysical processes as raindrops fall led to changes in d18O and deuterium excess (dexcess). Our findings establish a novel framework for evaluating the meteorological controls on the isotopic variability of convective precipitation in tropical South America, fill the gap in high-frequency studies in this region, and generate an isotopic dataset for convective model evaluations.-
Descrição: dc.descriptionEnvironmental Studies Center São Paulo State University (UNESP), Av. 24A, 1515, Bela Vista, Rio Claro-
Descrição: dc.descriptionEscuela de Física & Centro de Investigación en Contaminación Ambiental Centro de Investigaciones Geofísicas Universidad de Costa Rica-
Descrição: dc.descriptionDepartment of Earth and Environmental Sciences University of Texas at Arlington, 500 Yates Street-
Descrição: dc.descriptionFaculty of Physics and Applied Computer Science Agh University of Krakow, al. Mickiewicza 30-
Descrição: dc.descriptionInternational Atomic Energy Agency Isotope Hydrology Section Vienna International Centre, P.O. Box 100-
Descrição: dc.descriptionSão Paulo State University (UNESP) IPMet/Science College Est. Mun. José Sandrin Ipmet, S/N, 17, São Paulo-
Descrição: dc.descriptionEnvironmental Studies Center São Paulo State University (UNESP), Av. 24A, 1515, Bela Vista, Rio Claro-
Descrição: dc.descriptionSão Paulo State University (UNESP) IPMet/Science College Est. Mun. José Sandrin Ipmet, S/N, 17, São Paulo-
Formato: dc.format6663-6680-
Idioma: dc.languageen-
Relação: dc.relationAtmospheric Chemistry and Physics-
???dc.source???: dc.sourceScopus-
Título: dc.titleIsotopic composition of convective rainfall in the inland tropics of Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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