Submicrosecond structure of magnetic-field waveforms of different types of return strokes

0434196 - ÚFA 2015 RIV US eng C - Conference Paper (international conference)
Kolmašová, Ivana - Santolík, Ondřej - Lán, Radek - Uhlíř, Luděk
Submicrosecond structure of magnetic-field waveforms of different types of return strokes.
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI. New York: IEEE, 2014, s. 1-2. ISBN 978-1-4673-5225-3.
[URSI General Assembly and Scientific Symposium (URSI GASS). Beijing (CN), 16.08.2014-23.08.2014]
R&D Projects: GA ČR(CZ) GA14-31899S
Grant - others:Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M100421206
Institutional support: RVO:68378289
Keywords : cloud-to-ground lightning * lightning channel geometries * lightning currents * optical observations * return stroke * stroke channel * sub-microsecond * temporal change
Subject RIV: BL - Plasma and Gas Discharge Physics
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6929564&url=http%3A%2F%2Fieeexplore.ieee.org%2Fstamp%2Fstamp.jsp%3Ftp%3D%26arnumber%3D6929564

Optical observations show that the geometries of the lightning current channels belonging to different types of cloud-to-ground (CG) lightning strokes substantially differ [1, 2, 3]. The positive CG stroke channels are quite smooth [4, 5]. The lightning channel geometry of negative CG strokes depends primarily on the order of the stroke in the flash. The channels of first negative CG strokes are branched. Subsequent negative CG strokes copying the channel of the first stroke are similar to that of the first stroke but without branches. The newly created subsequent stroke channels are usually also branched. The channels of other subsequent strokes belonging to the same flash and sharing the same channel sometimes slightly differ, probably due to temporal changes of the lightning channel geometry during the development of the flash [6].
Permanent Link: http://hdl.handle.net/11104/0238321