冬季Hadley环流活动与大气臭氧变化的关系研究

Activity of the Hadley circulation and its correlations with the atmospheric ozone variation during the winter season

利用1957年9月到2002年8月,共540个月的ECMWF的经向风和臭氧质量混合比资料,分析研究了冬季Hadley环流强弱特征的变化对臭氧变化的影响.分析指出在冬季伴随Hadley环流的增强,其中心南移,高度升高,臭氧在对流层增加,平流层减少,臭氧总量呈现出减少的趋势.Hadley环流的增强,中心南移,高度升高以及臭氧在对流层的增加对全球变暖是正反馈,而平流层臭氧减少,臭氧总量减少对全球变暖是负反馈.因此Hadley环流的强弱对臭氧的影响明显.

Based on the ECMWF meridional wind and ozone mass mixing ratio data over the global for 540 months, the basic state of the Hadley Circulation （HC） during the period of 1957 to 2002 and its correlations with the atmospheric ozone variation have been studied. The results show that, （1） with the strengthening of the HC in winter, the central latitude of the HC moves southward and its vertical position is getting higher, at the same time, the tropospheric O3 amount will increase and the stratospheric O3 will decrease; （2） there exits a negative correlation between HC intensity and total ozone in the studied region, and （3） the HC strengthening and tropospheric O3 increasing will give a positive feedback mechanism on the global warming, while the decreasing for stratospheric O3 or total ozone amount will give a positive one.