Causes of Observed Long-Periodic Variations of the Polarization at Polar   Regions of Jupiter
  Data of 23-years of Jupiter polarimetric observations (1981- 2004) have been reprocessed using new improved technique. The data from other observers have been added to the analysis (1971-74). Anticorrelation between asymmetry of polarization and insolation has been found. The mechanism of influence of seasons changing (through temperature variations) on north-south asymmetry of polarization formation has been proposed. Also a possibility of existence of influence of solar cosmic rays flux on polarization value is noted. 
O. S. Shalygina, V. V. Korokhin, E. V. Shalygin, G. P. Marchenko, Yu.   I. Velikodsky, L. A. Akimov, O. M. Starodubtseva