BEHAVIOR OF TEMPERATURES AND GEOPOTENTIAL HEIGHTS IN THE LOWER STRATOSPHERE AT ANTARCTICA DURING WINTER AND THEIR ASSOCIATION WITH OZONE VARIABILITY

Using the monthly mean temperature and geopotential height data for 30 and 50 mbar and daily temperature and geopotential height data for 50 mbar at Syowa (69-degrees-S, 40-degrees-E) for a period of 10 years ( 1977-1982, 1984-1987), an attempt is made to investigate the dynamics of the lower stratosphere during the southern winter (September-Novemb er). Also considered is the monthly mean total ozone for the south pol e as derived from the Dobson spectrophotometer observations during Oct ober for the same 10-year period. The harmonic analysis of the daily d ata shows the presence of significant periodicities of 15, 40 and 60 d ays in the temperature and geopotential height of the Antarctic lower stratosphere. The 30-day periodicity dominates the scenario of the Ant arctic region during the southern winter. The analysis of monthly data has also suggested a direct relationship of temperature and geopotent ial height at 50 and 30 mbar (lower stratosphere) with the total ozone during winter.