Regional atmospheric dynamics govern interannual and seasonal stable isotope composition in southeastern Brazil

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidad Nacional-
Autor(es): dc.contributorCSIRO Land and Water-
Autor(es): dc.creatordos Santos, Vinícius [UNESP]-
Autor(es): dc.creatorGastmans, Didier [UNESP]-
Autor(es): dc.creatorSánchez-Murillo, Ricardo-
Autor(es): dc.creatorFelippe Gozzo, Luiz [UNESP]-
Autor(es): dc.creatorVianna Batista, Ludmila [UNESP]-
Autor(es): dc.creatorLilla Manzione, Rodrigo [UNESP]-
Autor(es): dc.creatorMartinez, Jorge-
Data de aceite: dc.date.accessioned2022-02-22T00:27:20Z-
Data de disponibilização: dc.date.available2022-02-22T00:27:20Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jhydrol.2019.124136-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/199428-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/199428-
Descrição: dc.descriptionClimatic factors controlling seasonal and interannual changes of stable isotope composition in precipitation remains understudied across the tropics. Daily isotopic measurements of rainfall (2014–2017, Rio Claro, Southeast of Brazil) were used to identify the climatic factors governing the isotopic variability. Overall, precipitation presented large variations, ranging between −18.36‰ and +4.89‰ for δ18O, −136‰ to + 43.4‰ for δ2H, and −11.8‰ to +26.6‰ for d-excess. The Local Meteoric Water Line (δ2H = 8.05 ± 0.1·δ18O + 13.08 ± 0.5) indicated a strong influence of moisture recirculation along the transport of air masses. During the summer (wet season), high moisture content prevailed in the atmosphere. The latter was associated with recycled moisture from Amazonia region due to the influence of the South Atlantic Convergence Zone and Frontal Systems, resulting in depleted precipitation (δ18O ≤ −6‰). During the winter (dry season), the combination of Cold Fronts and minimal moisture transport from the Amazonia region, resulted in more enriched rainfall (δ18O ≥ −1‰). Atmospheric recirculation processes along the moisture pathway were also reflected on the seasonal d-excess variation. The strong correlation of δ18O and relative humidity along HYSPLIT trajectories confirmed the influence of regional atmospheric dynamics over isotopic composition of precipitation. Our findings provide new understanding of rainfall generation within the Guarani aquifer recharge area.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionInternational Atomic Energy Agency-
Descrição: dc.descriptionSão Paulo State University (UNESP) Environmental Studies Center, Av. 24A, 1515, Bela Vista, 13.506-900-
Descrição: dc.descriptionStable Isotope Research Group Universidad Nacional-
Descrição: dc.descriptionSão Paulo State University (UNESP) Bauru Meteorology Centre Department of Physics, FC. Estrada Municipal José Sandrin, s/n – Chácara Bauruense-
Descrição: dc.descriptionSão Paulo State University (UNESP) Faculty of Science and Enginery-
Descrição: dc.descriptionCSIRO Land and Water, PO Box 2583-
Descrição: dc.descriptionSão Paulo State University (UNESP) Environmental Studies Center, Av. 24A, 1515, Bela Vista, 13.506-900-
Descrição: dc.descriptionSão Paulo State University (UNESP) Bauru Meteorology Centre Department of Physics, FC. Estrada Municipal José Sandrin, s/n – Chácara Bauruense-
Descrição: dc.descriptionSão Paulo State University (UNESP) Faculty of Science and Enginery-
Idioma: dc.languageen-
Relação: dc.relationJournal of Hydrology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectMoisture transport-
Palavras-chave: dc.subjectPrecipitation-
Palavras-chave: dc.subjectRegional atmospheric processes-
Palavras-chave: dc.subjectSoutheast Brazil-
Palavras-chave: dc.subjectStable isotopes-
Título: dc.titleRegional atmospheric dynamics govern interannual and seasonal stable isotope composition in southeastern Brazil-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.