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On the interaction of lightning upward connecting positive leaders with humans
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.
2009 (English)In: IEEE transactions on electromagnetic compatibility (Print), ISSN 0018-9375, E-ISSN 1558-187X, Vol. 51, no 4, 1001-1008 p.Article in journal (Refereed) Published
Abstract [en]

Upward connecting leaders can be initiated from humans under the influence of lightning downward stepped leaders, thereby causing severe injuries. In order to improve the scarce knowledge about the interaction of upward connecting leaders with humans, a self-consistent model based on the physics of leader discharges is used in this paper. Furthermore, a current-generation-type return-stroke model is applied to calculate the current pulse produced during the neutralization of unsuccessful aborted upward leaders. It is estimated that an upward connecting leader can be initiated even when the victim is located several tens of meters away from the lightning channel. However, the lightning exposure to a direct strike and to an aborted leader is found to be reduced by 50% and 70%, respectively, when an individual standing straight adopts the squat position. In the case of an aborted upward leader, it is estimated that a short-duration pulse of opposite polarity in the kiloampere range would be produced by the neutralization of the leader charge. Rough estimates of the total energy dissipated in the victim's body by the current of an aborted unsuccessful upward leader range between hundred and thousand joules.

Place, publisher, year, edition, pages
USA: IEEE , 2009. Vol. 51, no 4, 1001-1008 p.
Keyword [en]
biological effects of fields, lightning, safety, modeling
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-113134DOI: 10.1109/TEMC.2009.2033265ISI: 000271951600015ISBN: 0018-9375 (print)OAI: oai:DiVA.org:uu-113134DiVA: diva2:289918
Note

10978734 self-consistent model current-generation-type return-stroke model current pulse lightning channel short-duration pulse rough estimation lightning upward connecting positive leaders lightning downward stepped leaders

Available from: 2010-01-25 Created: 2010-01-25 Last updated: 2017-12-12Bibliographically approved

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