全球平均经圈环流的基本特征及其与臭氧关系研究

本文利用1957年9月到2002年8月,共540个月的ERA-40的经向风和臭氧质量混合比月平均资料,分析研究了平均经圈环流(MMC)和Hadley环流强弱特征变化及其与臭氧变化的关系.分析指出:(1)平均经圈环流与臭氧分布在垂直方向上有很好的对应和相关关系,平均经圈环流是形成臭氧水平、垂直的气候平均态分布,季节变化,年代际变化的重要因素;(2)垂直方向上北半球臭氧浓度的变化比南半球的变化更明显;(3)典型相关分析表明平均经圈环流与臭氧浓度变化在不同的高度和纬度上有不同的相关关系,臭氧与Hadley和Ferrel环流存在密切的相关关系,特别是Hadley环流,这表明Hadley环流在全球大气臭氧的变化中起重要作用.

Basic State of MMC and Its Correlation with Atmospheric Ozone Variation

The correlativity of mean meridional circulation (MMC)-ozone and the evolving relationship between Hadley circulation character and ozone are presented in this paper. Analysis on the basis of the European Centre for Medium-Range Weather Forecasts (ECMWF) ERA-40 meridional wind and ozone mass mixing ratio month averaged global data for 540 months from September 1957 to August 2002 revealed that correspondence and correlativity between MMC and ozone are strong in the vertical direction. MMC is a major factor in the formation of the average state distribution of horizontal and vertical ozone and seasonal and interdecadal change. In addition, the change in ozone concentration over the Northern Hemisphere in the vertical direction is more obvious than that in the Southern Hemisphere. Moreover, correlativity differs between MMC and ozone concentration at various altitudes and latitudes. Such close correlativity between ozone and Hadley circulation indicates that Hadley circulation plays an important role in global atmospheric ozone changes.