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Type: Artigo de periódico
Title: Cloud-to-ground lightning observations over the eastern Amazon Region
Author: Almeida, AC
Rocha, BRP
Souza, JRS
Pissolato, JA
Abstract: Cloud-to-ground (CG) lightning variables, space and time distributions near the equator, over Eastern Amazon, were analyzed in this work. Over seven million lightning flash events of this type, detected by a VAISALA lightning detection network were processed. This data set was collected by the Brazilian Amazon Protection System between 2006 and 2008. The results showed the sub-areas of higher occurrence densities, polarity types, current peak intensity intervals, as well as, the hourly distributions of CG lightning, for this region. A considerable percentage (7%) of discharges with stroke current peaks above 100 kA, was observed. An attempt was made to compare the statistical results of this work with observations made elsewhere in Brazil and other regions of the world. The differences found suggest that, some regional peculiarities of the CG lightning parameter values should be taken into consideration, for electric and telecommunication systems protection against atmospheric electric discharges, in the Amazon Region. (C) 2011 Elsevier B.V. All rights reserved.
Subject: Amazon Region
Atmospheric discharges
CG lightning
Electric systems protection
Country: EUA
Editor: Elsevier Science Inc
Rights: fechado
Identifier DOI: 10.1016/j.atmosres.2011.08.015
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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