"ANALYSIS OF CO2 CONCENTRATIONS AND IDENTIFICATION OF ITS SOURCES FROM CARBON ISOTOPIC COMPOSITIONS C-13 (´ 13 C-CO2) AND C-14 (”14 C-CO2) IN THE METROPOLITAN REGION OF SÃO PAULO (RMSP)"

• Grant number: 24/01021-6
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: June 01, 2024
• End date: September 30, 2027
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Meteorology
• Principal Investigator: Maria de Fátima Andrade
• Grantee: Leslie Lissethe Morales Espinoza
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 16/18438-0 - São Paulo Metropolitan Area, jointly tracking climate change and air quality - METROCLIMA-MASP, AP.PFPMCG.TEM

Abstract

This project aims to be one of the first studies on the estimation of atmospheric carbon dioxide (CO2) sources in the city of São Paulo through the determination of the C-13 and C-14 isotopes and their spatio-temporal variation. The CO2 concentration data to be used will come from five measurement points: Pico do Jaraguá, IAG-USP, UNICID, ICESP and CIENTEC, where high-precision continuous monitoring equipment (Picarro brand) is installed within the scope of the thematic project METROCLIMA (process FAPESP 2016/18438-0). At IAG-USP, PICARRO brand equipment installed on the technical terrace of the Main Building also provides ´13 C-CO2 measurements. The determination of ”14 C-CO2, which will be carried out for the first time in São Paulo, will include the participation of the group of prof. John Miller of NOAA. The values obtained from each measurement point will be used to estimate the possible sources (natural and anthropogenic) of CO2 from isotopes of C-13 (´ 13 C-CO2), C-14 (”14 C-CO2), as well as its transport between measurement sites using air parcel trajectories. Finally, the characterization of the temporal and spatial evolution of CO2 concentrations will be carried out.