 Recent studies have reviewed investigations on atmospheric gravity waves, AGW, and traveling ionospheric disturbances, TID, in the Earth's thermosphere and ionosphere. The first part of the review presents results from global model simulations and coordinated observation campaigns such as the Worldwide Atmospheric Gravity Wave Study, WAGs, while the second part describes progress towards understanding AGW slash TID characteristics, including their relationship and morphology slash climatology based on new observations. This article was authored by Kay Hock and Kay Schlegel.