Extending the Parameterization of Gravity Waves into the Thermosphere and Modeling Their Effects
作者： Erdal Yiğit , Alexander S. Medvedev
DOI: 10.1007/978-94-007-4348-9_25
关键词:
摘要: Vertical coupling by gravity waves (GWs) between the lower atmosphere and thermosphere is studied with a general circulation model (GCM) extending from tropopause to upper atmosphere. A newly developed nonlinear spectral GW parameterization, which accounts for wave propagation in highly dissipative thermosphere, has been implemented into Coupled Middle Atmosphere-Thermosphere-2 (CMAT2) GCM. In addition saturation, extended scheme considers dissipation suitable thermosphere-ionosphere, such as molecular viscosity thermal conduction, ion drag, eddy diffusivity, radiative damping. The results of simulations June solstice show that dynamical effects GWs are strong cannot be neglected thermosphere. At F region heights, momentum deposition comparable drag GW-induced heating/cooling competes high-latitude Joule heating.
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