Using statistical methods, the relationship has been studied between total ozone and 100-mbar temperature stratospheric temperatures at Syowa Station, Antarctica (69¿S, 40¿E), based on data based obtained in 1961--1981 and 1982--1988, the time of ozone depletion in Antarctica. Results indicate a strong, positive correlation between total zone and 100-mbar stratospheric temperatures during September-March for all years, but lower ozone values at 100-mbar stratospheric temperature colder than about -60¿C during the 1982--1988 period. Ozone destruction by heterogeneous photochemical processes is the main cause of ozone depletion over Syowa during the 1980's, with a lesser contribution from a change in air dynamics (heat, ozone, and momentum transport to Antarctica during the austral spring) that increased polar vortex stability, thereby promoting photochemical ozone depression within the vortex. ¿American Geophysical Union 1993