Evaluation of atmospheric 3-day waves as a source of day-to-day variation of the ionospheric longitudinal structure

We report for the first time the day-to-day variation of the longitudinal structure in height of the F-2 layer (h(m)F(2)) in the equatorial ionosphere using multi-satellite observations of electron density profiles by the Constellation Observing System for Meteorology, Ionosphere and Climate-2 (COSMIC-2). These observations reveal a similar to 3-day modulation of the h(m)F(2) wavenumber-4 structure viewed in a fixed local time frame during January 30-February 14, 2021. Simultaneously, similar to 3-day planetary wave activity is discerned from zonal wind observations at similar to 100 km by the Ionospheric Connection Explorer (ICON) Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI). This signature is not observed at similar to 180-250 km altitudes, suggesting the dissipation of this wave below the F-region. We propose that the 3-day variation identified in h(m)F(2) is likely caused by the planetary wave-tide interaction through the E-region dynamo.

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Author Liu, G.
England, S. L.
Lin, C. S.
Pedatella, Nicholas M.
Klenzing, J. H.
Englert, C. R.
Harding, B. J.
Immel, T. J.
Rowland, D. E.
Publisher UCAR/NCAR - Library
Publication Date 2021-08-01T00:00:00
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Topic Category geoscientificInformation
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Metadata Date 2025-07-11T16:13:32.168985
Metadata Record Identifier edu.ucar.opensky::articles:24683
Metadata Language eng; USA
Suggested Citation Liu, G., England, S. L., Lin, C. S., Pedatella, Nicholas M., Klenzing, J. H., Englert, C. R., Harding, B. J., Immel, T. J., Rowland, D. E.. (2021). Evaluation of atmospheric 3-day waves as a source of day-to-day variation of the ionospheric longitudinal structure. UCAR/NCAR - Library. https://n2t.org/ark:/85065/d76q21pc. Accessed 06 November 2025.

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