Articles | Volume 37, issue 5
https://doi.org/10.5194/angeo-37-943-2019
https://doi.org/10.5194/angeo-37-943-2019
Regular paper
 | 
10 Oct 2019
Regular paper |  | 10 Oct 2019

Nonlinear forcing mechanisms of the migrating terdiurnal solar tide and their impact on the zonal mean circulation

Friederike Lilienthal and Christoph Jacobi

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Latest update: 17 Jun 2024
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Short summary
We analyzed the forcing mechanisms of the migrating terdiurnal solar tide in the middle atmosphere, focusing the impact on the zonal mean circulation. We show that the primary solar forcing is the most dominant one but secondary wave–wave interactions also contribute in the lower thermosphere region. We further demonstrate that small-scale gravity waves can strongly and irregularly influence the amplitude of the terdiurnal tide as well as the background circulation in the thermosphere.