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Updated: Dec 6, 2025

Method for Recording Broadband High Resolution Emission Spectra of Laboratory Lightning Arcs
Published on: August 27, 2019
Lightning during the COVID-19 pandemic in Brazil
Osmar Pinto Neto1, Iara R C A Pinto2, Osmar Pinto2
1Center for Innovation, Technology and Education - CITE, Biomedical Engineering Department, Anhembi Morumbi University, São José dos Campos, 12247-016, Brazil.
Abstract:
This study is concerned with the effects of a decrease in the air pollution concentration on the lightning characteristics of two large Brazilian cities. The decrease in air pollution happened from March 20, till April 02, 2020, and it was caused by the social distancing effort to contain the COVID-19 spread in the cities. In São Paulo, the ratio between cloud-to-ground to intracloud flashes and the average peak current of negative cloud-to-ground flashes significantly decreased; whereas in Belo Horizonte, the ratio between positive and negative cloud-to-ground flashes significantly increased with respect to the values in previous years.
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