Yosuke Yamzaki (IAP, Deutschland) Atmospheric tidal variability in the mesosphere and lower thermosphere: New insight from JAWARA

Yosuke Yamzaki (IAP, Deutschland) wird auf unserem IAP-Kolloquium einen Vortrag zum Thema "Atmospheric tidal variability in the mesosphere and lower thermosphere: New insight from JAWARA" halten.

Zusammenfassung:

Atmospheric tides are primarily generated in the troposphere and stratosphere through periodic solar heating. As they propagate vertically upward, their amplitudes increase with altitude due to the decreasing background density. These tides dominate the large-scale dynamics of the mesosphere and lower thermosphere (MLT), and they play a significant role in driving ionospheric variability. While tides in the MLT region are highly variable, the mechanisms driving this variability remain poorly understood. This study examines tidal variability in the MLT region using the recently developed JAGUAR-DAS Whole neutral Atmosphere Reanalysis (JAWARA). JAWARA is the first long-term reanalysis of the neutral atmosphere from the surface to the lower thermosphere. The analysis of JAWARA temperature and wind data reveals how tidal activity in the MLT region is controlled by the state of the lower atmosphere.