ON THE ORIGIN OF ATMOSPHERIC OSCILLATIONS WITH PERIODS OF 27.32 AND 13.78 DAYS

In the Earth's atmosphere, oscillations with periods of 27.32 and 13.78 days have been repeatedly detected, which were attributed to the lunar gravitational-tidal mechanism of origin. In the present paper, it is shown that at least three solar indices have also spectral maxima with such or very close periods, and a hypothesis on the solar origin of the considered atmospheric oscillations is suggested and discussed.