Geophysical Research Letters· 2026Q1
Chorus Wave‐Induced Ionospheric Variability
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- Q1SCImago
- 2026year
Short summary
Chorus waves trigger electron microbursts that cause altitude-dependent ionospheric density changes and varying auroral emissions, with green and blue light responses differing based on wave repetition and radiative timescales.
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Key points
- Chorus waves induce electron microbursts, leading to ionospheric density variability and auroral emission production.
- Ionospheric density response is altitude-dependent due to varying timescales of chemical recovery, microburst duration, and chorus wave repetition.
- Green and blue auroral line radiation show different temporal behaviors.
- The study couples Wave-Particle Interaction, Geant4, and ionospheric chemistry models to investigate these effects.
AI-generated from the title and abstract; the full text is not read.
Abstract
Abstract Electron microbursts are short‐lived but intense electron precipitation and constitute a significant source of electron losses into the ionosphere and lower atmosphere. They are primarily produced by wave‐particle interaction with chorus waves in the magnetosphere. We investigate the effect of chorus wave‐induced electron precipitation on the ionospheric density variability and auroral emission production. The effect of individual microbursts on ionospheric changes is investigated by coupling the Wave‐Particle Interaction model, Geant4 Energetic Particle Precipitation model/Auroral Transport Model, and ionospheric chemistry model. It is found that the response in the ionospheric density is highly dependent on altitude, due to various time scales of different processes involved, including chemistry recovery timescale, individual microburst time duration, and repetition period of chorus waves. Different temporal behaviors are found for green and blue line radiation due to competition of chorus repetition period and radiative timescales.
The authors' abstract, as published at the source. Geophysical Research Letters, 2026 · DOI ↗
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Field: Astronomy and Astrophysics
Astronomy and AstrophysicsPhysics and Astronomy