On ion acoustic turbulence and the nonlinear evolution of kinetic Alfven waves in aurora

Journal Article · Mon Aug 15 04:00:00 EDT 1994 · Geophysical Research Letters

DOI:https://doi.org/10.1029/94GL01289· OSTI ID:28541

Wahlund, J E; Louarn, P; Chust, T; Feraudy, H de; Roux, A ^[1]; Holback, B; Dovner, P O; Holmgren, G ^[2]

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1. Centre de Recherches en Physique de l`Environnement Terrestre et Planetaire, Velizy (France)
2. Swedish Institute of Space Physics, Uppsala (Sweden)

Here the authors discuss wave measurements made by the Freja satellite of small scale structures in the auroral regions with enhanced Alfven wave activity, and in some cases broadband electrostatic turbulence. They argue that this turbulence is characteristics of ion acoustic wave activity. The joint existence of these two waves can rapidly damp the Alfven wave energy, providing significant energy deposition, which may relate to energization mechanisms for the auroral phenomena.

• OSTI ID: 28541
• Journal Information: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 17 Vol. 21; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALFVEN WAVES
AURORAL ZONES
DAMPING
ENERGY LOSSES
ION ACOUSTIC WAVES
IONOSPHERE