【摘 要】
：
用约20年Dobson和TOMS资料来分析北京(39.93°N,116.40°E)和昆明(25.02°N,102.68°E)两地大气臭氧总量的变化特征,结果表明:(1)在1979-2000年间北京大气臭氧长期变化趋势是
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用约20年Dobson和TOMS资料来分析北京(39.93°N,116.40°E)和昆明(25.02°N,102.68°E)两地大气臭氧总量的变化特征,结果表明:(1)在1979-2000年间北京大气臭氧长期变化趋势是-0.642 DU/年,而昆明在1980-2000年间的趋势是-0.009 DU/年;(2)北京和昆明两地大气臭氧都有很强的季节内变化(尤其冬季更强),与季节性变化强度相当;(3)在北京和昆明,由记录较短的大气臭氧资料分析得到的长期变化趋势,与较长记录得到的结果有显著差异;(4)在北京(中纬度)和昆明(低纬度)大气臭氧都有显著的准两年振荡信号;(5)两个站点大气臭氧的年际变化主要由长期趋势项和准两年振荡信号组成;(6)Dobson仪测量得到的臭氧总量与TOMS资料非常一致.
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