Non-Migrating Atmospheric Tides As A Driver Of Variability In The Nightside Martian Ionosphere
S. A. Thaller, Laboratory For Atmospheric And Space Physics, University Of Colorado Boulder, Boulder, Co,
Usa (Scott.Thaller@Lasp.Colorado,Edu), L. Andersson, Laboratory For Atmospheric And Space Physics, University Of Colorado Boulder, Boulder, Co, Usa.

Understanding The Dynamics Of The Nightside Ionosphere Of
Mars Has Presented More Of A Challenge Than Those On The
Dayside Due To The Nightside Being More Difficult To Characterize As A Result Of The Plasma Density Being Lower And
More Variable There [E.G., Girazian Et Al., 2017; Nemnec Et
Al., 2010]. Causes Of This Enhanced Electron Density Variability Are Not Yet Fully Understood, But Have Been Studied In
The Context Of Ionizing Electron Precipitation [E.G., Fowler
Et Al., 2015; Lillis Et Al., 2018], Combination Of Ionizing
Electron Precipitation And Horizontal Transport From The
Dayside [E.G., Adams Et Al., 2018], Composition And Chemistry [Girazian Et Al., 2017], And Solar Flare Events [Harada,
Et Al., 2018]. One Possible Source Of Nightside Variability Is
Nonmigrating Tides In The Neutral Atmosphere. It Had Been
Shown That Nonmigrating Tides Do Play A Role In The Dayside
Ionospheric Variability [E.G., Bougher Et. Al 2001;
Mendillo Et Al., 2017; Fang Et Al 2021; Thaller Et Al., 2020;
2021]. Altitude Profiles Of The Amplitude Of The Normalized
Longitudinal Electron Density Variations On The Night Side