Long Term Observation on Rain Stable Isotope in the Central Region of São Paulo State

• Grant number: 24/06442-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: September 01, 2024
• Status: Discontinued
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Didier Gastmans
• Grantee: Amanda Rodrigues Soares
• Host Institution: Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• Associated scholarship(s): 24/23661-7 - Precipitation stable isotopes revealing climatic connections between Central Amazon and Southeastern Brazil, BE.EP.MS

Abstract

Assessments of time series on the variability of the rainfall isotopic composition, over continuous observations, have been widely used to understand the effects of climate change, especially in medium to high latitude areas (temperate climate), but there is a gap in this type of analysis in tropical regions, especially due to the lack of long-term isotopic observations. Thus, studies in tropical regions are extremely important to assess the influence of meteorological parameters on the isotopic composition of rainfall, since these regions have a very unique climate that has great influence on the distribution of rainfall regimes. The aim of this project is to evaluate the historical series of isotopic data from the GNIP station at the Center for Environmental Studies at Unesp/Rio Claro, since the climate in the central region of the state of São Paulo is directly affected by different atmospheric systems that impact on the variation in isotopic rain composition. The research seeks to understand the local and regional climate dynamics that affect the isotopic composition of precipitation in the municipality of Rio Claro and its variability based on the analysis of a long-term observation series. Rainfall samples has been collected in Rio Claro since 2014, reflecting 10 years of continuous sampling that will be analyzed in this research, relating them to local and regional climate parameters. For the synoptic analysis, data will be obtained from the Reanalysis Project, from the ERA5/Copernicus and GIOVANNI/NASA platforms, while local meteorological data will be acquired from the measuring stations of the Center for Environmental Studies and the Center for Environmental Analysis and Planning, located at the same location as the collection of isotopic events. Statistical tests and synoptic maps will be used to support the analysis.