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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Publication Date 2021-08-01T00:00:00
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Metadata Date 2025-07-11T16:13:32.168985
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Suggested Citation . (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 30 December 2025.

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