Observations of Elves and Radio Wave Perturbations by Intense Lightning
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F23%3A00571821" target="_blank" >RIV/68378289:_____/23:00571821 - isvavai.cz</a>
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JD036541" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JD036541</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022JD036541" target="_blank" >10.1029/2022JD036541</a>
Alternative languages
Result language
angličtina
Original language name
Observations of Elves and Radio Wave Perturbations by Intense Lightning
Original language description
Electromagnetic pulses (EMPs) and quasi-static electric fields (QE) from powerful lightning heat and ionize the lower ionosphere. The EMP disturbance may appear as an elve at ∼80–95 km altitude, and the QE field as a halo or a sprite at ∼60–80 km altitude. Both are thought to perturb crossing radio signals because of changes to the electrical conductivity of the regions. Here we present an analysis of 63 elves and corresponding radio signal perturbations from an almost stationary thunderstorm system that allows us to untangle some of the dependencies of perturbations on the lightning characteristics. The amplitude perturbations of a VLF-transmitter signal are characterized as either long-recovery, early events (LOREs) or as early events. We find that LOREs are related to lightning with high peak currents and bright elves, and that their sign (amplitude increase or decrease) depends on the relative locations of the transmitter, disturbance and receiver. Based on a subset of strokes, lightning with elves has on average ∼3 times the impulse charge-moment-change and power in broadband as lightning of similar peak currents without elves. The early events occur without observed elves, sprites or halos. They recover in ∼10–100 s and are observed for both polarities of cloud-to-ground lightning and for intracloud flashes. It is proposed that these observations may relate to regions of reduced conductivity caused by an electron attachment/detachment process at lower heights, or by electron enhancements associated with TLEs that are too dim to be detected by the camera.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GA20-09671S" target="_blank" >GA20-09671S: Investigation of lightning discharges at different scales</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Atmospheres
ISSN
2169-897X
e-ISSN
2169-8996
Volume of the periodical
128
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
20
Pages from-to
e2022JD036541
UT code for WoS article
001000215500001
EID of the result in the Scopus database
2-s2.0-85160445377