Longitudinal and seasonal variation of the equatorial flux tube integrated Rayleigh-Taylor instability growth rate

Using the National Center for Atmospheric Research Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM), the ionospheric Rayleigh-Taylor instability growth rate is calculated. The seasonal and longitudinal variations of the growth rate from the TIEGCM appear to match that of the spread F observed by various satellite missions. The growth rate is strongly dependent on the angle between the sunset terminator and the geomagnetic field line near the magnetic equator. The TIEGCM simulations with nonmigrating tides show the zonal wave number 4 structure in the Rayleigh-Taylor instability due to the inclusion of the nonmigrating diurnal eastward zonal wave number 3 and semidiurnal eastward zonal wave number 2 tides.

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Copyright 2015 American Geophysical Union.
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Author Wu, Qian
Publisher UCAR/NCAR - Library
Publication Date 2015-09-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T19:04:09.053366
Metadata Record Identifier edu.ucar.opensky::articles:17740
Metadata Language eng; USA
Suggested Citation Wu, Qian. (2015). Longitudinal and seasonal variation of the equatorial flux tube integrated Rayleigh-Taylor instability growth rate. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7377b6z. Accessed 19 July 2025.

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