@Article{SchumannSaWaFeHeThOr:2019:TrMeUp,
author = "Schumann, Carina and Saba, Marcelo Magalh{\~a}es Fares and
Warner, Tom A. and Ferro, Marco A. S. and Helsdon Junior, John H.
and Thomas, Ron and Orville, Richard E.",
affiliation = "{University of the Witwatersrand Johannesburg} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {South Dakota School
of Mines and Technology} and {Instituto de Aeron{\'u}atica e
Espa{\c{c}}o (IAE)} and {South Dakota School of Mines and
Technology} and {New Mexico Tech} and {Texas A\&M University}",
title = "On the triggering mechanisms of upward lightning",
journal = "Scientific Reports",
year = "2019",
volume = "9",
pages = "e9576",
month = "July",
abstract = "Upward lightning studies took place in Rapid City, South Dakota,
USA and S. Paulo, Brazil during the summer thunderstorm seasons
from 2011 to 2016. One of the main objectives of these campaigns
was to evaluate and characterize the triggering of upward positive
leaders from tall objects due to preceding nearby flash activity.
110 upward flashes were observed with a combination of high-and
standard-speed video and digital still cameras, electric field
meters, fast electric-field antenna systems, and for two seasons,
a Lightning Mapping Array. These data were analyzed, along with
correlated lightning location system data, to determine the
triggering flash type responsible for the initiation of upward
leaders from towers. In this paper, we describe the various
processes during flash activity that can trigger upward leaders
from tall objects in the USA and in Brazil. We conclude that the
most effective triggering component is the propagation of the
in-cloud negative leader during the continuing current that
follows a positive return stroke.",
doi = "10.1038/s41598-019-46122-x",
url = "http://dx.doi.org/10.1038/s41598-019-46122-x",
issn = "2045-2322",
language = "en",
targetfile = "2019 B - Nature Scientific Reports Upward Triggering Mechanisms
Schumann et al.pdf",
urlaccessdate = "03 maio 2024"
}