摘要
本文构造了一个３４层球坐标原始方程波－流相互耦合谱模式，利用此模式从拉格朗日平均环流的观点研究了在常定流下行星波对臭氧的输运作用。研究结果表明，行星波对臭氧的输运有明显的季节变化，在北半球冬季，由于行星波上传到平流层而大大增强了中高纬地区向极地向下的Ｏ３输运；并且还表明，热带纬向风的ＱＢＯ不仅通过影响东、西风切变而引起热带Ｏ３分布的年际变化，而且通过影响行星波的传播引起了行星波对Ｏ３输运的年际变化，这表现为当热带纬向风处于东风位相时，中高纬地区行星波对Ｏ３的输运比西风位相时强。
A 34-level coupled planetary wave-zonal flow, mechanistic global primitive equation model is constructed. And the effects of planetary wave transport on ozone are studied with the Lagrangian mean circulation forced by planetary waves while the flows are steady.The results show that there is an obvious seasonal variation of ozone due to planetary wave transport and the transport is largest during the winter over the Northern Hemisphere; The results also show that the QBO of tropical winds may cause interannual variation of ozone not only in the tropical regions through the secondary meridional circulation in the westerly or easterly shear zones, but also in the middle and high latitudes area through planetary wave transport. When tropical winds are the easterly, the effects of planetary wave transport on ozone are stronger at the middle and high latitudes than that during the westerly phase.
出处
《大气科学》
CSCD
北大核心
1996年第5期513-523,共11页
Chinese Journal of Atmospheric Sciences
关键词
臭氧
行星波输运
年际变化
中层大气
常定流
ozone planetary and wave transport interannual variability lagrangian mean circulation
