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Isotopic composition of precipitation and its relationship with climatic variability in the southern central portion of São Paulo State (BR)

Grant number: 16/18735-5
Support type:Scholarships in Brazil - Master
Effective date (Start): June 01, 2017
Effective date (End): June 30, 2018
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Didier Gastmans
Grantee:Vinícius dos Santos
Home Institution: Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil


Stable isotopes of hydrogen (1H/2H) and oxygen (16O/17O/18O) constitute excellent tracers of movement of the water molecule through the hydrological cycle, being used as an important tool in the interpretation of the origins of flows within river basins, climate controls on precipitation and groundwater origin, which enables its use in paleoclimatic reconstruction studies. In tropical areas, the climatic factors that govern the isotopic composition of precipitation remains a controversial question in the scientific community, while some authors propose that the isotopic composition of precipitation is influenced by aspects of local climatic dynamics, others advocate the importance of processes global scale, the type Rayleigh distillation. Based on the processes involved in the isotopic transformations undergone by the water along its path in the hydrologic cycle in continental areas, this project has for objective evaluate the isotopic variations of precipitation in some areas of the state of São Paulo, seeking to understand the climatic factors (local or regional) responsible for controlling isotopic variations in precipitation, especially those associated with the formation and the types of rain and its features. Therefore it will be analyzed together the isotopic composition of precipitation, weather information provided by the Tropical Rainfall Measurring Mission (TRMM) and HYSPLIT model. Such tools will be very important for evaluation of atmospheric systems that generate rain for the studied locations and what the effects of these on the isotopic composition of precipitation. The matrix of meteorological and isotopic data generated will be used in statistical regression testing, in order to create a robust model that correlates the isotopic content to local and regional climatic parameters or the atmospheric systems that operate in Brazil. (AU)

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DOS SANTOS, VINICIUS; DE OLIVEIRA, MARCELO DIAS; BOLL, JAN; SANCHEZ-MURILLO, RICARDO; MENEGARIO, AMAURI ANTONIO; GOZZO, LUIZ FELIPPE; GASTMANS, DIDIER. Isotopic composition of precipitation during strong El Nino-Southern Oscillation events in the Southeast Region of Brazil. Hydrological Processes, v. 33, n. 4, p. 647-660, . (15/15749-2, 16/18735-5)
SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; SANCHEZ-MURILLO, RICARDO; SANTOS, VINICIUS DOS; BATISTA, LUDMILA VIANNA; BETANCUR, SEBASTIAN BALBIN. Stable isotopes reveal groundwater to river connectivity in a mesoscale subtropical watershed. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, v. 57, n. 3, p. 236-253, . (17/13576-9, 18/06666-4, 16/18735-5)
CHERRY, MIKAELA; GILMORE, TROY; MITTELSTET, AARON; GASTMANS, DIDIER; SANTOS, VINICIUS; GATES, JOHN B.. Recharge seasonality based on stable isotopes: Nongrowing season bias altered by irrigation in Nebraska. Hydrological Processes, v. 34, n. 7, . (17/50038-5, 16/18735-5)
DOS SANTOS, VINICIUS; GASTMANS, DIDIER; SANCHEZ-MURILLO, RICARDO; GOZZO, LUIZ FELIPPE; BATISTA, LUDMILA VIANNA; MANZIONE, RODRIGO LILLA; MARTINEZ, JORGE. Regional atmospheric dynamics govern interannual and seasonal stable isotope composition in southeastern Brazil. Journal of Hydrology, v. 579, . (15/15749-2, 16/18735-5, 18/06666-4)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SANTOS, Vinícius dos. Variation in the isotopic composition of the central portion of the State of São Paulo and its interface with climatic systems. 2018. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Geociências e Ciências Exatas. Rio Claro Rio Claro.

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