elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

Emission Heights of Energetic Lightning Pulses in Thunderstorm Clouds

Betz, Hand-Dieter and Marshall , Thomas and Stolzenburg, Maribeth and Höller, Hartmut and Schmidt, Kersten (2011) Emission Heights of Energetic Lightning Pulses in Thunderstorm Clouds.

Full text not available from this repository.

Abstract

Since 2004 the newly developed 3D lightning detection network LINET utilizes VLF/LF techniques for measurements of distinct pulses with waveforms and amplitudes that often resemble the ones typical for return strokes but occur inside thunder-clouds and do not connect to ground. For simplicity, these distinct signals are termed ‘IC-strokes’. The determined emission heights represent a new data source and call for further explanation. In a first attempt to understand the nature of these IC-strokes, 3D scans from polarimetric high-resolution radar of DLR (POLDIRAD) have been used for comparison, giving verification that the heights coincide with regions of graupel and ice aloft. A more specific IC-stroke analysis was carried out in 2010: a 7-sensor LINET system was set up at Kennedy Space Center (Florida) enabling a comparison with 3D lightning data from 4DLSS (also called LDAR2), the high-resolution VHF network operated by NASA. It turned out that the emission heights of LINET IC-strokes fit perfectly into channels defined by radio source points from 4DLSS, no matter whether these channels were located in lower (<7 km) or higher (>10 km) altitudes, and independent of whether the discharge was a ground- or a cloud flash. In fact, the accuracy of LINET heights was mostly better than ~10%. Furthermore, earlier observations [Betz et al., 2008] from comparisons with 2D VHF (Safir type) systems in Europe have been confirmed: in a substantial fraction of discharges the first measurable signal is an IC-stroke, whereby the VHF system does not record any prior electric activity.

Document Type:Proceedings
Title:Emission Heights of Energetic Lightning Pulses in Thunderstorm Clouds
Authors:
AuthorsInstitution or Email of Authors
Betz, Hand-DieterUNSPECIFIED
Marshall , ThomasUNSPECIFIED
Stolzenburg, MaribethUNSPECIFIED
Höller, HartmutUNSPECIFIED
Schmidt, KerstenUNSPECIFIED
Date:2011
Status:Published
Keywords:Lightning, Thunderstorms, Radar
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Dr.rer.nat. Hartmut Höller
Deposited On:29 Dec 2011 14:19
Last Modified:29 Dec 2011 14:19

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.