低纬海气系统的年际振荡及其相互联系

INTERANNUAL OSCILLATIONS OF LOW LATITUDE AIR-SEA SYSTEMS AND THEIR INTERRELATIONSHIP

摘要:

本文从COADS资料中选取了低纬地区(主要是太平洋地IX)部分区域的海温(SST)、海平面气压(SLP)的逐月气候距平和南方涛动指数(SOI)等时间序列资料,分别对所得到的序列进行了最大熵谱分析,比较了不同区域的海气系统的年际变动的共同特征和彼此间的差异。同时,还利用多变量最大熵谱方法计算了在年际振荡的各主要周期上各海气系统之间的凝聚和位相差函数,并由此讨论了这些系统准周期振荡间的可能联系。

Abstract:

In this paper, time series data from CO ADS (monthly climatological anomalies of SST and sea level pressure and SOI for parts of low latitude Pacific) were selected to compare in MEM analyses the common characteristics of the interannual oscillations in air-sea systems and differences between individual regions. In addition, multivariable MEM is applied to derive functions of coagulation and phase difference for individual systems at principle periods of the interannual oscillations, on which discussions are based of possible links among the systems’ quasi-periodic oscillations.