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Cloud Lightning: Detection and Utilization for Total Lightning Measured in the VLF/LF Regime

Betz, Hans Dieter and Schmidt, Kersten and Fuchs, Brigitte and Oettinger, Wolf Peter and Höller, Hartmut (2007) Cloud Lightning: Detection and Utilization for Total Lightning Measured in the VLF/LF Regime. Journal of Lightning Research, 2, pp. 1-17.

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Official URL: http://www.jolr.org/

Abstract

Lightning detection networks operating in the VLF/LF-regime have been traditionally designed to report cloud-to-ground (CG) strokes with currents above ~5 kA while they suppress recording of all types of cloud discharges (IC) by special methods. Efficient detection and reporting of IC emission has been achieved mainly with VHF arrays. The Munich group studies VLF/LF radiation with methods equally sensitive to CG and IC signals and utilized a new 21-sensor network (LINET, lightning detection network) to obtain total lightning data by means of a single technique. Three important network features are i) the measurement of estimated currents as low as ~1 kA, a range which has attracted little experimental attention in the past, ii) discrimination of IC events from CG strokes by means of a special 3D-feature in the location algorithm, and (iii) the reporting of IC emission heights. In accordance with general expectations, high IC event rates have been found at low amplitudes. Typical IC’s exhibit multi-polar pulse-trains which defy assignment of a clear-cut sign for the amplitude; however, there is also a large portion of IC events which are sufficiently mono-polar to allow classification as having positive or negative polarity. In most storm cells an excess of positive polarity IC (IC+) events is found; together with negative polarity IC (IC-) events promising information is obtained about discharge types, identification of storm cells and of the onset of super-cell storms and severe weather conditions.

Document Type:Article
Title:Cloud Lightning: Detection and Utilization for Total Lightning Measured in the VLF/LF Regime
Authors:
AuthorsInstitution or Email of Authors
Betz, Hans DieterUniv. of Munich, München
Schmidt, KerstenUniv. of Munich, München
Fuchs, BrigitteUniv. of Munich, München
Oettinger, Wolf PeterUniv. of Munich, München
Höller, HartmutUNSPECIFIED
Date:August 2007
Journal or Publication Title:Journal of Lightning Research
Volume:2
Page Range:pp. 1-17
Status:Published
Keywords:Lightning, Thunderstorms
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Dr.rer.nat. Hartmut Höller
Deposited On:07 Sep 2007
Last Modified:12 Dec 2013 20:27

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