Mesospheric, lower thermospheric dynamics and external forcing effects: A review

A review is presented on some of the most important experimental results and models obtained by international scientific community during last decade for the mesospheric and lower thermospheric dynamics (mean winds, planetary waves, tides and internal gravity waves). In addition to climatological features, the external forcing - the coupling from below (stratosphere) and possible influence of solar and geomagnetic activity on the dynamical processes at this region are presented.