冬季北极涛动与行星波活动的关系  

Relationship between Arctic Oscillation and Planetary Waves in Winter

作　　者：熊光明[1] 陈权亮[1,2] 蒋玥[1] 罗娟[1] 

机构地区：[1]成都信息工程学院大气科学学院,高原大气与环境四川省重点实验室,四川成都610225 [2]中科院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室,北京100029

出　　处：《成都信息工程学院学报》2012年第3期273-278,共6页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(41005021;40830955)

摘　　要：为了进一步认识北极涛动与行星波之间的关系,利用NCEP/NCAR再分析资料并借助谐波分析、相关分析等方法讨论了北极涛动异常下行星波的活动情况。结果表明:在北极涛动指数强(弱)值年,纬向平均风场在中纬度明显减小(增大),在中高纬度明显增大(减小);行星波1波振幅在低纬度对流层中层和中纬度平流层明显增大(减小),在高纬度平流层明显减小(增大);2波振幅在中纬度对流层明显减小(增大),在高纬度平流层有所增大(减小)。E-P通量反映出在北极涛动强(弱)值年,行星波1波在中高纬度从地面向上传播显著增强(减弱),低纬度波导显著增强(减弱),极地波导显著减弱(增强);2波在中高纬度从地面向上传播显著减弱(增强),低纬度波导和极地波导变化不明显。In order to furtherly understand the relationship between the AO and planetary waves, by using the NCEP/ NCAR reanalysis data and with the help of some methods such as Harmonic Analysis and Correlation Analysis, Planetary Wave Activity in abnormal AO has been discussed. The Results are below： During the year of large （small） AO index, the mean field of zonal wind was reduced （increased） significantly in the middle latitude and increased （reduced） obviously in the middle and high latitude; The Amplitude of the wavenumber 1 was increased （reduced） obviously in the middle troposphere at low latitude and in stratosphere at mid-latitude. It reduced （increased） remarkably in high latitude at Stratosphere. The Amplitude of the wavenumber 2 was reduced （increased） obviously in troposphere at mid-latitude. It increases （reduces） in Stratosphere at high latitude. The E-P flux shows that during the year of large（small） AO index the spread of the wavenumber i was significantly enhanced （receded） from the ground to upward space in the middle and high latitude. The waveguide was increased （reduced） obviously in low latitude and reduced （increased） obviously in polar region; The spread of the wavenumber 2 was significantly receded （enhanced） from the ground to upward space in the middle and high latitude. There is no significant variation about the waveguide in low latitude, either in the polar region.

关 键 词：气象学 气候变化 北极涛动 行星波 E-P通量 

分 类 号：P461[天文地球—大气科学及气象学]