@Article{SabaSchWarHelOrv:2015:HiViEl,
author = "Saba, Marcelo Magalh{\~a}es Fares and Schumann, Carina and
Warner, Tom A. and Helsdon, John H. and Orville, Richard E.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {South Dakota School
of Mines and Technology} and {South Dakota School of Mines and
Technology} and {Texas A\&M University}",
title = "High-speed video and electric field observation of a negative
upward leader connecting a downward positive leader in a positive
cloud-to-ground flash",
journal = "Electric Power Systems Research",
year = "2015",
volume = "118",
pages = "89--92",
keywords = "Positive lightning, positive leader, stepped leader, high-speed
video, electric field, connect leader.",
abstract = "It has been discussed in past papers if a positive leader
propagates in a stepped fashion or not. Some studies state that,
in some positive cloud-to-ground flashes, the electric field
pulses observed just before the connection of the positive leader
to ground could be a manifestation of the stepping of the leader.
Some authors say, however, that it may be due to the stepping of
the negative upward connecting leader during its ascension toward
the downward positive leader. In this work we present a
well-documented case of a positive cloud-to-ground flash that
shows that the pulses observed in the electric field preceding the
return stroke are due solely to the upward propagation of a
negative connecting leader. This flash was recorded simultaneously
by a fast electric field sensor and a high-speed camera in July
2012 in the Black Hills area of South Dakota.",
doi = "10.1016/j.epsr.2014.06.002",
url = "http://dx.doi.org/10.1016/j.epsr.2014.06.002",
issn = "0378-7796 and 1873-2046",
label = "lattes: 5746446930759722 2 SabaSchWarHelOrv:2014:HiViEl",
language = "en",
targetfile = "High speed.pdf",
url = "http://www.sciencedirect.com/science/article/pii/S0378779614002119",
urlaccessdate = "27 abr. 2024"
}