Advanced search
Start date

Analysis of the historical geomagnetic field in South America

Grant number: 13/16382-0
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): January 01, 2014
Effective date (End): May 31, 2018
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal Investigator:Ricardo Ivan Ferreira da Trindade
Grantee:Wilbor Poletti Silva
Home Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated scholarship(s):16/22960-4 - Geomagnetic field strength in the Amazon Region from microwave archeointensity measurements, BE.EP.DD


Secular changes in direction and intensity of the geomagnetic field can be used to infer about the mechanisms of field generation in the Earth's outer core. In this project we will analyze the variations, in time and space, of the Earth's magnetic field over South America, where the dipolar components of the geomagnetic field are anomalously weak. This region, one of the most important windows for understanding the magnetohydrodynamics in the in outer core and in the core-mantle boundary, is still poorly covered by data. We will investigate: (a) variations of intensity and inclination of the geomagnetic field in historical materials (e.g. bricks and tiles) of South America, especially in southern Brazil, northern Argentina and southern Bolivia (Jesuit Missions of the XVII-XVIII centuries); (b) the response of local and global geomagnetic field models to the new data for South America, including the experimental data to be obtained in the thesis. (AU)

Articles published in Revista Pesquisa FAPESP about the scholarship:
Magnetic memories of the Jesuit missions 

Scientific publications
(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)
HARTMANN, GELVAM A.; POLETTI, WILBOR; TRINDADE, RICARDO I. F.; FERREIRA, LUCIO M.; SANCHES, PEDRO L. M. New archeointensity data from South Brazil and the influence of the South Atlantic Anomaly in South America. Earth and Planetary Science Letters, v. 512, p. 124-133, APR 15 2019. Web of Science Citations: 0.
POLETTI, WILBOR; BIGGIN, ANDREW J.; TRINDADE, RICARDO I. F.; HARTMANN, GELVAM A.; TERRA-NOVA, FILIPE. Continuous millennial decrease of the Earth's magnetic axial dipole. PHYSICS OF THE EARTH AND PLANETARY INTERIORS, v. 274, p. 72-86, JAN 2018. Web of Science Citations: 6.
POLETTI, WILBOR; TRINDADE, RICARDO I. F.; HARTMANN, GELVAM A.; DAMIANI, NADIR; RECH, RAQUEL M. Archeomagnetism of Jesuit Missions in South Brazil (1657-1706 AD) and assessment of the South American database. Earth and Planetary Science Letters, v. 445, p. 36-47, JUL 1 2016. Web of Science Citations: 14.

Please report errors in scientific publications list by writing to: