Model studies of gravity wave influences on the atmospheric sodium layer

Abstract:

A time-dependent nonlinear chemical-dynamical model is used for investigating the sodium chemistry and dynamical characteristics of gravity waves in the mesopause region. From the observations by Na lidar, we know that gravity waves play an important role in the vertical transport of atmospheric constituents. However, the transport induced by the chemical reactions is poorly known and it might also affect the distribution of mesospheric constituents a lot. It is important to fully understand the dynamical and chemical influences by the gravity waves. Besides, Lidar also observed some Na layers in the lower thermosphere extended to 150km. By developing this nonlinear model, more atmospheric processes can be simulated and explained.