Abstract
AbstractKislovodsk sets of observations (1957.5-1991.0) of the corona in the line Fe XIV 5303 Å have been processed. Half annual intensities of corona have been approximated with the polynoms of the m-degree in dependence on latitude. The coefficients of these sets have been found using the least square solution method. The zone of zero values of the second derivation of the coronal intensity on latitude has been determined. It is shown that this zone emerges after the magnetic field reversal at the latitudes near 80° then migrates equatorward during 22 years with a velocity of 2 m/s. The obtained data were compared with a pattern of torsional oscillations plotted on the basis of the velocity field. A possible reason for 22 year pole to equator variations in the corona is considered.
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