Comparison of Very Low Frequency Wave Intensities Measured by a Low-Altitude Spacecraft and on the Ground
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10485206" target="_blank" >RIV/00216208:11320/24:10485206 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=3yvQ2blGCY" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=3yvQ2blGCY</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2024JA032655" target="_blank" >10.1029/2024JA032655</a>
Alternative languages
Result language
angličtina
Original language name
Comparison of Very Low Frequency Wave Intensities Measured by a Low-Altitude Spacecraft and on the Ground
Original language description
We evaluate average wave intensities at frequencies up to 10 kHz measured by two ground stations in Canada and two others in Finland at auroral and subauroral latitudes over a full year, as well as by the low-altitude DEMETER spacecraft during the years 2004-2010. Lightning location and energy data obtained by the World Wide Lightning Location Network, along with geomagnetic activity characterized by the Kp index, are further used. Latitudinal, diurnal, and annual variations are analyzed, and the global intensities measured on the ground and by the spacecraft are systematically compared for the first time. We show that lightning-generated waves often dominate the measured wave intensities, particularly during the night, in summer, and at higher frequencies. DEMETER observations, supported by ray-tracing analysis, reveal a significant role of nonducted lightning-generated whistler propagation between the hemispheres. Finally, the wave intensity response to geomagnetic activity variations is quite different on the ground compared to in space. While spacecraft-measured wave intensities are considerably larger during periods of enhanced geomagnetic activity, the ground-based intensities are only sporadically enhanced during geomagnetically active periods. A global comparison of wave intensities measured by the DEMETER satellite and the Kannuslehto/PWING ground stations is performed Lightning-generated waves often dominate both DEMETER and ground observations, especially at night, in summer, and at higher frequencies Daytime intensities measured by DEMETER are larger during active periods, while on the ground they are only sporadically enhanced
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/GA21-01813S" target="_blank" >GA21-01813S: Anthropogenic electromagnetic emissions and their effects on the Earth’s inner magnetosphere</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
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. Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
129
Issue of the periodical within the volume
7
Country of publishing house
US - UNITED STATES
Number of pages
16
Pages from-to
e2024JA032655
UT code for WoS article
001263098500001
EID of the result in the Scopus database
2-s2.0-85197687434