摘要
利用卫星观测臭氧总含量ＴＯＭＳ（第７版）资料，在剔除季节变化后对全球６０°Ｓ－６０°Ｎ范围首先进行了沿纬度分布的线性趋势和周期分析。结果表明：自本世纪７０年代末，各纬带上的臭氧总量都呈下降趋势，强度随纬度升高而加剧，并发现总体上北半球臭氧的下降趋势较南半球更加明显；同时证实了准两年振荡是臭氧变化中除年周期外最显著的周期。并对臭氧变化中的准两年振荡作了遥相关分析；发现准两年振荡在强度和位相上基本呈纬向分布并主要表现出赤道对称的特征。１３５～１７０°Ｅ地区臭氧总量变化所表现出的不同于其它地区的原因可能是这一地区常年频繁出现的对流活动；
ased 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 quasibiennial oscillation is the most significant period in the changes of ozone except the annual variation.Secondly,teleconnection analysis for the quasibiennial oscillation has been done,and the result shows that zonal distribution and equatorial symmetry in intensity and phase are the main characters in the quasibiennial oscillation in the changes of ozone.
出处
《气象学报》
CSCD
北大核心
1998年第4期485-492,共8页
Acta Meteorologica Sinica
基金
自然科学重大项目
96-908-04-02-4课题
