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.

У.У. Kulikov at al. 02 : 15 - 02:30 07 : 15 - 07:30 12 : 15 - 12:30 17 : 15 - 17:30 22 : 15 - 22:30 04 : 45 - 05:00 09 : 45 - 10:00 14 : 45 - 15:00 10 : 45 - 20:00 T im e , m s k Fig. 3. Variations o f the ozone line emission intensities obtained on March 14, 2009. Fig. 3 demonstrates results o f microwave measurements for the ozone line emission intensities carried out on March 14. Each point in the figure is average for 30 min o f integral intensity near the line center. Black rectangles are related to measurements under HF-pumping conditions, whereas white rectangles are related to cases when PW was switch-off. When the atmosphere was HF-pumped, the decrease in emission intensity by approximately 10% is clearly seen here. Besides, in the figure horizontal bold lines show time-averaged intensities obtained during day and night hours o f measurements. Data presented in the table below summarize measured ozone number densities at altitudes o f ~ 60 km retrieved from spectral data obtained under different conditions. The effect o f the decrease of the ozone number density during atmosphere pumping is clearly visible. The value o f such decreasing, obtained by data averaging over all days of measurements, is, on average, of ~ 17%. It should be mentioned that the diurnal variation o f the ozone number density, additionally obtained during our measurements, is, on average, o f ~ 42%, which is close to its commonly observed magnitude. Date 14.03.2009 15.03.2009 16.03.2009 17.03.2009 Time, msk 0 3number density 09 :10 - 10:59 (9.37±0.48)-109 DAY 11:34 - 15:00 (8.03±0.38)109 HF PUMPING 15:05 - 17:30 (9.09±0.42)-109 DAY 18:20- 00:01 (1.28±0.06)-10'° NIGHT 00 :16 - 06:18 (1.21±0.07)-10'° NIGHT 06:18 - 12:14 (9.60±0.50)-109 DAY 12:18 - 14:48 (8.31±0.29)109 HF PUMPING 14:48 - 17:56 (9.2310.21)-109 DAY 17:56 - 23:56 (1.44±0.07)-1&° NIGHT 0 0 :11 - 05:05 (1.36±0.07)10w NIGHT 0 6 :20 - 12:15 (9.55±0.40)-109 DAY 12:19 - 14:33 (7.32±0.47)109 HF PUMPING 14:33 - 17:56 (9.01±0.24)-109 DAY 17:56 - 23:47 (1.19±0.06)-10w NIGHT . 00:01 - 05:15 (1.36±0.05)-10w NIGHT 06:13 - 11:43 (9.82±0.35)-109 DAY 11:43 - 13:13 (8.97±0.49)109 HF PUMPING 13:28 - 17:59 (9.67±0.30)'109 DAY 18:02 - 23:45 (1.22±0.05)10w NIGHT Conclusion: HF-induced decreasing in the ozone number density at altitudes o f ~ 60 km is, on average, (1.1710.03) 176