TY - JOUR A1 - Mironova, I. A. A1 - Usoskin, I. G. A1 - Kovaltsov, G. A. A1 - Petelina, S. V. T1 - Possible effect of extreme solar energetic particle event of 20 January 2005 on polar stratospheric aerosols: direct observational evidence JO - Atmos. Chem. Phys. J1 - ACP VL - 12 IS - 2 SP - 769 EP - 778 Y1 - 2012/01/17 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/12/769/2012/ L1 - http://www.atmos-chem-phys.net/12/769/2012/acp-12-769-2012.pdf DO - 10.5194/acp-12-769-2012 ER -