@Article{SabaPaiConWarSch:2020:OpObNe,
author = "Saba, Marcelo Magalh{\~a}es Fares and Paiva, Amanda Rom{\~a}o de
and Concollato, Luke C. and Warner, Tom A. and Schumann, Carina",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {University of Oxford}
and {ZT Research} and {University of the Witwatersrand}",
title = "Optical observation of needles in upward lightning flashes",
journal = "Scientific Reports",
year = "2020",
volume = "10",
number = "1",
pages = "e17460",
month = "Dec.",
abstract = "Why lightning sometimes has multiple discharges to ground is an
unanswered question. Recently, the observation of small plasma
structures on positive leaders re-ignited the search. These small
plasma structures were observed as pulsing radio sources along the
positive leader length and were named needles. Needles may be the
missing link in explaining why lightning flickers with multiple
discharges, but this requires further confirmation. In this work
we present the first optical observations of these intriguing
plasma structures. Our high-speed videos show needles blinking in
slow motion in a sequential mode. We show that they are formed at
unsuccessful leader branches, are as bright as the lightning
leaders, and report several other optical characteristics.",
doi = "10.1038/s41598-020-74597-6",
url = "http://dx.doi.org/10.1038/s41598-020-74597-6",
issn = "2045-2322",
language = "en",
targetfile = "saba_optical.pdf",
urlaccessdate = "10 maio 2024"
}