摘要
讨论了给定的南极春季臭氧洞(取自1979—1985年臭氧减少的观测结果)对二维平流层—对流层模式中温度和环流的影响。11月份,南极上空约17km处,温度最多可降低6℃。这种温度变化引起的平均经向环流对臭氧洞起填塞作用,不过,这种影响很小,每年仅产生14DU的变化。观测事实表明,近年来10月份,南半球波活动减弱。为此,我们作了南半球波作用全年都减少一半,并考虑了臭氧洞的数值试验。结果表明,臭氧柱在11月份76°S减少了44DU,在赤道却增加了12DU。
The effect of a prescribed Antarctic spring ozone hole(based on the observed ozone decrease from 1979 to 1985) on the temperature and circulation fields of a two—dimensional stratosphere—troposphere model is discussed. The temperature fell by a maximum of 6 degrees in November at about 17 km at the south pole. The mean meridional circulation induced by this temperature change acted to fill in the hole,though the effect was small,producing a change of 14 DU one year. Since observations suggest a fall in the southern hemisphere wave activity in October in recent years,a version of the model in which the southern hemisphere wave driving is reduced by 50% throughout the year,and in which the ozone hole is also present,is run. The ozone column falls by up to 44 DU at 76°S in November but rises by 12 DU near the equator.
出处
《南京气象学院学报》
CSCD
1993年第1期13-21,共9页
Journal of Nanjing Institute of Meteorology
关键词
臭氧
平流层
动力学
数值试验
ozone,dynamics in the stratosphere, wave activity, numerical experiment
