STUDY ON CHANGES OF OZONE OVER THE GLOBE DURING THE PAST 15 YEARS

Based on global TOMS (Total Ozone Mapping Spectrometer) data during Nov.,1978-Apr.,1993,after rejecting the annual variation,the study aimed at the linear trend,the periodic variation of the zonal mean total ozone over 60°S-60°N.The results show that since the end of 1970's,total ozone decrease at all latitudes with bigger trends at higher latitudes,while the trend in the Northern Hemisphere is bigger than that in the Southern Hemisphere at same latitude.Meanwhile,it is discovered that quasi-bienni-aloscillation is the most significant period in the changes of ozone except the annual variation.Secondly,teleconnection analysis for the quasi-biennial oscillation has been done,and the result shows that zonal distribution and equatorial sym metry in intensity and phase are the main characters in the quasi-biennial oscillation in the changes of ozone.