Two‐day oscillation of the equatorial ionization anomaly

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1992 English Publisher:American Geophysical Union (AGU)Journal:Journal of Geophysical Research: Space Physics, volume 97, pages 6,343-6,357 (issn: 0148-0227,

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Authors: Pei‐Ren Chen;

doi: 10.1029/91ja02445

Two‐day oscillation of the equatorial ionization anomaly

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Abstract

The day‐to‐day variability of the equatorial ionization anomaly (EIA), especially the 2‐day oscillation of the EIA, has recently been studied in China. We suggest that the main driving source of the 2‐day oscillation (or the day‐to‐day variation) of the EIA is a planetary wave with a 2‐day period (or the superposition of planetary waves with different periods). The planetary wave modulates the tidal wind, and this results in the 2‐day oscillation of the EIA via the dynamo effect and fountain effect. This suggestion, derived from the observational data, has been confirmed by numerical simulations.

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