Connections between deep tropical clouds and the Earth's ionosphere

We report on a series of simulations with the National Center for Atmospheric Research (NCAR) thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (TIME-GCM) which were designed to replicate and facilitate the interpretation of the longitudinal structure discovered in IMAGE satellite airglow observations of the equatorial ionization anomaly (EIA) at the far-ultraviolet (FUV) 135.6-nm wavelength during March-April 2002 equinox. Our TIME-GCM results indicate that the four-peaked longitudinal variation in the EIA observed by IMAGE-FUV near 20:00 local solar time can be explained by the effects of an eastward propagating zonal wavenumber-3 diurnal tide (DE3) that is excited by latent heat release associated with raindrop formation in the tropical troposphere.

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An edited version of this paper was published by AGU. Copyright 2007 American Geophysical Union.
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Author Hagan, Maura
Maute, Astrid
Roble, Raymond G.
Richmond, Arthur D.
Immel, T.
England, S.
Publisher UCAR/NCAR - Library
Publication Date 2007-10-25T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-17T16:01:15.074812
Metadata Record Identifier edu.ucar.opensky::articles:6584
Metadata Language eng; USA
Suggested Citation Hagan, Maura, Maute, Astrid, Roble, Raymond G., Richmond, Arthur D., Immel, T., England, S.. (2007). Connections between deep tropical clouds and the Earth's ionosphere. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d7pk0gbg. Accessed 24 October 2025.

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