| Texto completo | |
| Autor(es): |
Cruz, Ivan T.
;
Saba, Marcelo M. F.
;
Silva, Jose Claudio O.
;
Abbasi, Rasha U.
;
Hunt, Hugh G. P.
;
Schumann, Carina
;
da Silva, Diego R. R.
;
da Silva, Tagianne P.
;
Lauria, Paola B.
;
Kieu, Ny T.
Número total de Autores: 10
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Geophysical Research Letters; v. 52, n. 2, p. 9-pg., 2025-01-28. |
| Resumo | |
This study analyzes the two-dimensional speed profiles of 107 stepped leaders and 93 dart leaders recorded by high-speed cameras in Utah (USA), together with data from lightning location system. The results shows that the final and average speed of the stepped leader has a very strong (R = 0.82) and strong (R = 0.71) correlation with the peak current of the return stroke. It also shows that 91% of the stepped leaders increased their speed near the ground (average increase of 69%). The same analysis for dart leaders shows weak correlation with the peak current of the prospective return stroke (R = 0.39 to average speed and R = 0.28 to final speed). This paper briefly discusses why peak current is better correlated with final speed than with the average speed, and why stepped leaders exhibit a significant correlation, while dart leaders do not. (AU) | |
| Processo FAPESP: | 23/03908-5 - Estudo das correntes de longa duração em descargas atmosféricas |
| Beneficiário: | Marcelo Magalhães Fares Saba |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 23/15336-6 - Instrumentação, análise de dados e publicações |
| Beneficiário: | José Claudio de Oliveira e Silva |
| Modalidade de apoio: | Bolsas no Brasil - Programa Capacitação - Treinamento Técnico |
| Processo FAPESP: | 22/10808-4 - Caracterização dos pulsos de raios gama terrestre a partir de observações ópticas |
| Beneficiário: | Ivan Toucedo Cruz |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |