Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

Influence o fHFpowerful waves on the ozone content in the Earth's atmosphere Possible nature o f the observed decreasing in the ozone number density It is well known that in the ionospheric D-region negative oxygen ions appear due to the following process: 6 + 2 О 2 —^ О 2 + О 2 ’ the rate of which is increased with electron temperature growth. One branch of transformation of 02 to others ions is 0-, 4- Оъ—>0} +О 2 , and further 03 + C02—>CO} + 02■ The last reaction goes for very short time. It is therefore concluded that both ozone number density and emission intensity for the ozone line have to decrease with electron temperature growth. Our estimations have shown that at used PW power of ~ 80 MW the value of electron temperature growth can be of (20- 40) % at altitudes of ~ 60 km. This is responsible for the increase of 02 number density by (15 - 30) % and, as a result of that, for the decrease of the ozone number density by like amount, which is close to its value obtained in our experiments. Following results were obtained during these experiments: 1. D-region HF pumping causes to the decrease of the content of the neutral ozone in 17% at a height of about of 60 km. After pump wave switches-off the ozone content is restored. 2. Averaged diumal variations of the mesospheric ozone content at a height o f about of 60 km, which are connected with sunrise and sunset phenomena, has the magnitude o f about o f 40%. A cknow ledgm en ts. This work was supported by RFBR grants 08-05-99047, 08-02-00171, 09-05-01041, 09-05-10033, and 09-05-97014. References 1. Krasilnikov A .A , Kulikov Y .Y , Ryskin V .G , Shchitov A .M , Microwave receivers for diagnostics small gas constituents terrestrial atmosphere, Izvestiya AN. Seriya Phisicheskaya, Vol. 67, P. 1791-1795, 2003. 2. Kulikov, Y .Y , Krasilnikov A .A , Ryskin V .G , Shanin V .N , Shchitov A .M , Ground-based microwave instrument to research of stratospheric ozone (some results of observations). «Physics of Auroral Phenomena», Proc. XXX Annual Seminar, Apatity, P. 218-221, 2008. 3. de la Noe J , Baudry A , Perault M , Dierich P , Monnanteuil N , and Colmont M , Measurements o f the vertical distribution of ozone by ground-based microwave techniques at the Bordeaux observatory during the June 1982 intercomparison campaign. Planet. Space Sci, Vol. 16, 7, P. 737-741, 1983. 4. Barnett J.J, Comey M , Middle atmosphere reference model derived from satellite data, Handbook for MAP, Vol. 16, P. 47-85, 1985. 177