中文摘要：

扇子(2007 ) 最近在南的冬季记录了南极摆动(AAO ) 的带的不对称现象。在这研究，北环形的模式的带的不对称现象，或北极摆动(AO ) ，在里面内部年度可变性被学习北方的冬季。也有 AO 的带的不对称现象，这被显示出，类似于南极摆动(AAO ) 的盒子。然而， AO 的带的不对称现象比 AAO 的更加弱。这在推测以外是远的，自从地理的带的不对称现象比南部的半球在北半球是更大的。AO 的西方、东方的半球部分在 0.54 点被相关为 1959 1998，为 AAO 的盒子与 0.23 作比较。作者也为这内部半球的差别讨论了物理原因，并且部分把它归因于 El Niño 和可以被 SO 索引代表的南部的摆动(ENSO ) 周期。那么联系的海平面的压力(SLP ) 模式是更多，这被显示带在北半球的高纬度对称比南部的半球。

英文摘要：

Fan （2007） recently documented the zonal asymmetry of the Antarctic oscillation （AAO） in the austral winter. In this research, the zonal asymmetry of the northern annular mode, or the Arctic oscillation （AO）, in the interannual variability is studied for the boreal winter. It is shown that there is zonal asymmetry of the AO as well, similar to the case of the Antarctic oscillation （AAO）. However, the zonal asymmetry of the AO is considerably weaker than that of the AAO. This is far beyond the speculation, since the zonal asymmetry of the geography is larger in the Northern Hemisphere than the Southern Hemisphere. The Western and Eastern Hemispheres portions of the AO are correlated at 0.54 for 1959-1998, comparing with 0.23 for the case of the AAO. The authors also discussed the physical reason for this inter-hemispheric difference, and partly attributed it to the El Ni~o and Southern Oscillation （ENSO） cycle which may be represented by the SO index. It is indicated that the SO associated sea-level pressure （SLP） patterns are more zonal symmetric in the high latitudes of the Northern Hemisphere than the Southern Hemisphere.