Southern ozone variations induced by solar particle events during 15 January - 5 February 2005

A preliminary analysis of effects induced on the high-latitude Southern ozone layer by the enhanced Space Weather storms of January 2005 is presented. Data from Earth Probe TOMS V.8 and SAGE II suggest short- (hours) and medium-term (days) ozone depletions induced by the outstanding solar activity. Such ozone variabilities seem to concern not only the so-called polar cap but also its external environment.