Atmospheric Waves and Their Impacts on Ionospheric Dynamics
Summary
Atmospheric waves—encompassing gravity waves, planetary waves and tides—originate in the lower and middle atmosphere and propagate upward into the ionosphere, where they modulate winds, temperatures and electric fields. As these waves reach altitudes above 90 km they interact with the ionised medium, driving perturbations in electron density, currents and electrodynamic coupling. Sudden stratospheric warmings can amplify planetary wave activity, induce reversals in mean meridional circulation and alter tidal amplitudes. These processes influence the electrodynamic dynamo in the E-region and the distribution of plasma in the F-region, with consequences for radio propagation, satellite drag and space weather forecasting. Recent advances in global observations and high-resolution modelling have elucidated the mechanisms by which wave-driven momentum and energy fluxes shape ionospheric variability on timescales from hours to days. A detailed understanding of these couplings underpins improved prediction of ionospheric disturbances, benefiting navigation, communication and climate monitoring applications.
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Atmospheric Waves and Their Impacts on Ionospheric Dynamics publication trend
The graph below shows the total number of articles in atmospheric waves and their impacts on ionospheric dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Gravity wave: Buoyancy-driven oscillation in the atmosphere generated by airflow over topography, convection or jet instabilities, which transfers momentum upward.
Planetary wave: Large-scale wave in atmospheric pressure and wind patterns, with periods of days to weeks, influenced by Earth’s rotation and latitudinal gradients.
Tide: Periodic oscillation in atmospheric pressure, temperature and winds driven by solar heating, with diurnal and semidiurnal components.
Sudden stratospheric warming (SSW): A rapid temperature increase in the winter polar stratosphere accompanied by wind reversals, which alters wave propagation into the mesosphere and ionosphere.
Equatorial electrojet (EEJ): A narrow ribbon of enhanced eastward current flowing in the dayside equatorial E-region ionosphere, driven by tidal winds and the dynamo process.
References
- Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) On-Orbit Wind Observations: Data Analysis and Instrument Performance. Space Science Reviews (2023).
- September 2019 Antarctic Sudden Stratospheric Warming: Quasi‐6‐Day Wave Burst and Ionospheric Effects. Geophysical Research Letters (2020).
- Sq and EEJ—A Review on the Daily Variation of the Geomagnetic Field Caused by Ionospheric Dynamo Currents. Space Science Reviews (2016).
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