The relationship between first and subsequent stroke electric field peak in negative cloud-to-ground lightning

摘要

In this paper we show details about the relationship between first and subsequent stroke electric field peak in negative cloud-to-ground lightning in Brazil. A field measurement campaign during summer 2006 in Brazil collected electric field data with a GPS synchronized fast electric field flat-plate antenna. The data analysis shows that the ratio between first stroke fields and subsequent stroke fields in Brazil and in Austria is smaller than in Florida and that the ratio which is including single strokes, differs significantly even between Austria and Brazil. We further found that 38.2% of the flashes in Brazil had at least one subsequent stroke peak field greater than the first stroke peak field.