Vol. 21, issue 05, article # 6

pdf Mikhalev A. V., Medvedeva I. V., Kostyleva N. V., Stoeva P. V. Manifestation of solar activity in variations of atmospheric emissions at 557.7 and 630 nm in the 23rd solar cycle. // Atmospheric and oceanic optics. 2008. V. 21. No. 05. P. 369-374.
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We present the preliminary analysis of experimental data of nightglow observation of the atomic oxygen 557.7 nm (emitting layer heights are 85-115 km) and 630 nm (180-250 km) lines emissions in the current 23rd solar cycle. The experimental data were obtained at ISTP Geophysical observatory near Irkutsk (52°N, 103°E). The obtained data are compared with atmospheric, solar, and geophysical parameters. Generally, the 630 nm emission intensity in the 23rd solar cycle varied in phase with the solar cycle, increasing from the low to high solar activity periods. As for 557.7 nm emission, the difference in coefficients of correlation between its intensity and F10,7 solar activity index in different phases of solar cycle was noted. A negative correlation between monthly average 557.7 nm emission intensity and F10,7 was revealed in the phases of solar activity increase and maximum, which then changed into a positive correlation in the decay phase. The perturbation in the phase synchronism of 557.7 nm emission and F10,7 behavior during the phases of solar activity increase and maximum is preliminary explained by a high sensitivity of atmospheric parameters, determining the 557.7 nm emission intensity, to atmospheric dynamics and various disturbances (including the effects from below) at the emitting layer heights.