HAO Colloquium - Lunar Tide in the Thermosphere-Ionosphere

Speaker: Ruth Lieberman, NASA/GSFC
Atmospheric lunar tides are driven by the gravitational attraction between the Earth and the Moon. The lunar tide is an effective marker of vertical atmospheric coupling because it originates at Earth’s surface, propagates vertically, and is fully sampled in daytime-only and post-sunset satellite measurements. This presentation shows observations of the 12-hour lunar semidiurnal tide (denoted M2) in GOLD OI 135.6 nm emissions, and in ICON neutral winds and vertical ion drift. The appearance of M2 in the ionosphere is consistent with the paradigm of E x B plasma uplift due to the neutral wind-driven E-region dynamo.
Date and time: 
Wednesday, October 20, 2021 - 2:00pm to 3:00pm