For six winters, planetary waves and associated meridional fluxes of momentum and heat have been analyzed up to mesospheric heights. The December monthly mean of planetary wave amplitude one (two) reaches its maximum at 40 km (30 km) of 700 gpm (300 gpm) at 60 ¿N. Further, the reflection of planetary waves in the stratosphere has been discussed by model results as well as by analyzed data. It was shown that the stationay wave-one amplitude and phase in the upper troposphere strongly depend on stratospheric wind conditions. Especially, the evidence of this dependence in the analyzed data supports the idea that extraterrestrial or anthropogenic influences on the stratosphere can lead to consequences in tropospheric heights.