Magnetically Quiet-Time Traveling Ionospheric Disturbances Over Mid-Latitude Eastern Europe Observed by the Kharkiv Incoherent Scatter Radar During the 24th Solar Cycle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00619007" target="_blank" >RIV/68378289:_____/25:00619007 - isvavai.cz</a>

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033583" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JA033583</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024JA033583" target="_blank" >10.1029/2024JA033583</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetically Quiet-Time Traveling Ionospheric Disturbances Over Mid-Latitude Eastern Europe Observed by the Kharkiv Incoherent Scatter Radar During the 24th Solar Cycle

Popis výsledku v původním jazyce

We have detected and characterize traveling ionospheric disturbances (TIDs) in the mid-latitude ionosphere over Europe using data from the Kharkiv incoherent scatter (IS) radar. The study focused on observations near solstices and equinoxes during solar cycle 24 under magnetically quiet conditions. We examined the diurnal, seasonal, and solar activity dependencies of both large-scale (LS) and medium-scale (MS) TIDs, evaluating 140 TID events. Key estimated characteristics included energetic (relative amplitudes), temporal (dominant periods, frequency of occurrence), and spatial (heights of maximum relative amplitudes, vertical and horizontal phase velocities, and wavelengths) parameters. Our findings suggest that moving solar terminators are the primary generation mechanism for magnetically quiet-time LS TIDs, though a contribution from auroral activity cannot be excluded. In contrast, MS TIDs under magnetically quiet conditions are likely initiated from a broader range of sources, including gravity wave dissipation, severe tropospheric convection, coupling processes between the Es-layer and F-region, polarization electric fields, and Perkins instability. We found a positive correlation between the heights of the maximum relative TID amplitudes and the solar activity for LSTIDs. The TID characteristics obtained during extremely quiet conditions provide a useful context for analyzing the possible TID response to localized energy releases including those of anthropogenic origin. Additionally, they enable improvements in global and regional ionospheric models by clarifying the contribution of wave processes to the overall energy budget of the atmosphere and ionosphere.

Název v anglickém jazyce

Magnetically Quiet-Time Traveling Ionospheric Disturbances Over Mid-Latitude Eastern Europe Observed by the Kharkiv Incoherent Scatter Radar During the 24th Solar Cycle

Popis výsledku anglicky

We have detected and characterize traveling ionospheric disturbances (TIDs) in the mid-latitude ionosphere over Europe using data from the Kharkiv incoherent scatter (IS) radar. The study focused on observations near solstices and equinoxes during solar cycle 24 under magnetically quiet conditions. We examined the diurnal, seasonal, and solar activity dependencies of both large-scale (LS) and medium-scale (MS) TIDs, evaluating 140 TID events. Key estimated characteristics included energetic (relative amplitudes), temporal (dominant periods, frequency of occurrence), and spatial (heights of maximum relative amplitudes, vertical and horizontal phase velocities, and wavelengths) parameters. Our findings suggest that moving solar terminators are the primary generation mechanism for magnetically quiet-time LS TIDs, though a contribution from auroral activity cannot be excluded. In contrast, MS TIDs under magnetically quiet conditions are likely initiated from a broader range of sources, including gravity wave dissipation, severe tropospheric convection, coupling processes between the Es-layer and F-region, polarization electric fields, and Perkins instability. We found a positive correlation between the heights of the maximum relative TID amplitudes and the solar activity for LSTIDs. The TID characteristics obtained during extremely quiet conditions provide a useful context for analyzing the possible TID response to localized energy releases including those of anthropogenic origin. Additionally, they enable improvements in global and regional ionospheric models by clarifying the contribution of wave processes to the overall energy budget of the atmosphere and ionosphere.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Geophysical Research-Space Physics

ISSN

2169-9380

e-ISSN

2169-9402

Svazek periodika

130

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

e2024JA033583

Kód UT WoS článku

001460530200001

EID výsledku v databázi Scopus

2-s2.0-105002149907