LONG-TERM TRENDS OF SOME CHARACTERISTICS OF THE EARTHS ATMOSPHERE - EXPERIMENTAL RESULTS

Long-term linear trends of the following parameters were estimated usi ng rocket, optical, and radiophysical measurements performed over the last 3-5 decades: stratospheric and mesospheric temperatures, hydroxyl emission and rotational temperature in the mesopause, atomic oxygen e mission in the thermosphere and electron density in the E and F2 regio n of the ionosphere. The results of investigations performed by a numb er of research groups with the use of different techniques point to gl obal changes in the middle and upper atmosphere.