Plausible effect of atmospheric tides on the equatorial ionosphere observed by the FORMOSAT-3/COSMIC: Three-dimensional electron density structures

The plausible effect of atmospheric tides on the longitudinal structure of the equatorial ionosphere is observed by the FORMOSAT-3/COSMIC (F3/C) constellation during September Equinox, 2006, near solar minimum. The longitudinal structure was first reported in IMAGE satellite airglow observations at the far-ultraviolet (FUV) 135.6-nm wavelength during March Equinox, 2002, near solar maximum. The global three-dimensional ionospheric electron density observed by F3/C shows a prominent four-peaked wave-like longitudinal enhancement in the equatorial ionization anomaly (EIA). The vertical electron density structures observed by F3/C reveal that the feature exists mainly above 250 km altitude indicating that the feature is an F-region phenomenon. The four longitudinal F-region enhancements of the EIA peaks may result from a stronger equatorial plasma fountain at each longitude region produced by a stronger F-region eastward electric field transmitted along the magnetic field lines from E-region where longitudinal variations in atmospheric tides affect the ionospheric dynamo process.

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An edited version of this paper was published by AGU. Copyright 2006 American Geophysical Union.
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Author Lin, C.
Wang, Wenbin
Hagan, Maura
Hsiao, C.
Immel, T.
Hsu, M.
Liu, J.
Paxton, L.
Fang, Tzu-Wei
Liu, C.
Publisher UCAR/NCAR - Library
Publication Date 2007-06-14T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-17T17:01:31.555189
Metadata Record Identifier edu.ucar.opensky::articles:6587
Metadata Language eng; USA
Suggested Citation Lin, C., Wang, Wenbin, Hagan, Maura, Hsiao, C., Immel, T., Hsu, M., Liu, J., Paxton, L., Fang, Tzu-Wei, Liu, C.. (2007). Plausible effect of atmospheric tides on the equatorial ionosphere observed by the FORMOSAT-3/COSMIC: Three-dimensional electron density structures. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d798877r. Accessed 02 August 2025.

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