Number of the records: 1

Whistler intensities above thunderstorms

SYSNO ASEP	0340437
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Whistler intensities above thunderstorms
Author(s)	Fišer, Jiří (UFA-U)_{RID, ORCID} Chum, Jaroslav (UFA-U)_{RID, ORCID} Diendorfer, G. (AT) Parrot, M. (FR) Santolík, Ondřej (UFA-U)_{RID, ORCID}
Source Title	Annales Geophysicae. - : Copernicus - ISSN 0992-7689 Roč. 28, č. 1 (2010), s. 37-46
Number of pages	10 s.
Publication form	web - web
Language	eng - English
Country	US - United States
Keywords	Ionosphere (Wave propagation) ; Meteorology and atmospheric dynamics (Lightning) ; Radio science (Waves in plasma)
Subject RIV	BL - Plasma and Gas Discharge Physics
R&D Projects	GA205/09/1253 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z30420517 - UFA-U, BC-A (2005-2011)
UT WOS	000274136900005
DOI	10.5194/angeo-28-37-2010
Annotation	We report a study of penetration of the VLF electromagnetic waves induced by lightning to the ionosphere. We compare the fractional hop whistlers recorded onboard the DEMETER satellite with lightning detected by the EUCLID network. We have developed software for automatic detection of the fractional hop whistlers in the VLF spectrograms. We obtain a map of mean amplitudes of whistler electric field as a function of latitudinal and longitudinal difference between the location of the causative lightning and satellite magnetic footprint. The mean whistler amplitude monotonically decreases with horizontal distance up to ~1000 km from the lightning. The maximum of whistler intensities is shifted from the satellite magnetic footprint ~1° owing to the oblique propagation. The average amplitude of whistlers increases with the lightning current. At nighttime, the average amplitude of whistlers is about three times higher than during the daytime.
Workplace	Institute of Atmospheric Physics
Contact	Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
Year of Publishing	2010

Number of the records: 1