Multi-instrument Observations of Transient Luminous Events Associated with a Small-scale Winter Thunderstorm

0484719 - ÚFA 2018 US eng A - Abstract
Kolmašová, Ivana - Santolík, Ondřej - Spurný, P. - Borovička, J. - Mlynarczyk, J. - Popek, Martin - Lán, Radek - Uhlíř, Luděk - Diendorfer, G. - Slošiar, R.
Multi-instrument Observations of Transient Luminous Events Associated with a Small-scale Winter Thunderstorm.
AGU Fall Meeting. s. l.: American Geophysical Union, 2017. AE21A-02.
[AGU Fall Meeting 2017. 11.12.2017-15.12.2017, New Orleans]
Institutional support: RVO:68378289
Keywords : transient luminous events * VLF * lightning
Subject RIV: DG - Athmosphere Sciences, Meteorology
https://agu.confex.com/agu/fm17/meetingapp.cgi/Paper/222573

We present observations of transient luminous events (TLEs) produced by a small-scale winter thunderstorm which occurred on 2 April 2017 in the southwest of Czechia. Elves, sprites and associated positive lightning strokes have been simultaneously recorded by different observational techniques. Optical data include video recordings of TLEs from Nydek (Czechia) and data recorded by high time-resolution photometers at several stations of the Czech fireball network which measured the all-sky brightness originating from lightning return strokes. Electromagnetic data sets include 3-component VLF measurements conducted in Rustrel (France), 2-component ELF measurements recorded at the Hylaty station (Poland) and signal intensity variations of a VLF transmitter (DHO38, Rhauderfehn, Germany) recorded in Bojnice (Slovakia). Optical and electromagnetic data are completed by positions and peak currents of all strokes recorded during the observed thunderstorm by the EUCLID lightning detection network. We focus our analysis on positive lightning discharges with high peak currents and we compare properties of those which produced TLE with properties of discharges for which TLE was not detected. The current moment waveforms and charge moment changes associated with the TLE events are reconstructed from the ELF electromagnetic signals. Obtained current moment waveforms show excellent agreement with high time-resolution optical data.
Permanent Link: http://hdl.handle.net/11104/0279853