中文摘要：

在华南海(SCS-SSH ) 的海表面高度的时间空间的可变性模式用 Cyclostationary 实验直角的功能(CSEOF ) 方法被获得，并且他们到和平的盆的关系放大摆动被检验。SCS-SSH 的第一个 CSEOF 模式是被一个慢慢地变化的主要部件(PC ) 调制的一个强烈锁阶段的年度周期；这个年度周期的力量变得在 El Ni 期间减少了 ? o 事件(在 30% 最逍遥法外离开在 1997/98 ) 并且在 La 期间提高了 Ni ? 一事件。第二个模式在十的时间规模上将近是低频率摆动，与它展出阴暗月依赖的空间结构；相应 PC 高度与和平的十的摆动(PDO ) 索引被相关。五独立摆动在和平被使用独立部件(IC ) 孤立 SCS-SSH 上的分析(集成通信适配器) 方法，和他们的效果被检验。这被揭示纯 ENSO 模式(它类似于东方太平洋 ENSO ) 当时，在 SCS-SSH 的低频率可变性上有小效果使红的 ENSO 模式(它类似于中央和平的 ENSO ) 清楚的效果。作为使红的 ENSO，模式是 PDO 的重要成分，这解释 PDO 为什么是比在 modulating 的 ENSO 更重要的 SCS-SSH 的低频率可变性。象摆动模式，温暖模式的自台湾东面的菲律宾海流向日本的暖流延期，和赤道的冷却模式一样的南方的僵绳被 ICA 成功地也检测，但是他们在 SCS-SSH 的低频率可变性上有小效果。进一步的分析建议和平的摆动可能以在 SCS 与海表面温度(SST ) 的不同的方法正在影响 SCS-SSH 的可变性。

英文摘要：

The spatio-temporal variability modes of the sea surface height in the South China Sea（SCS-SSH） are obtained using the Cyclostationary Empirical Orthogonal Function（CSEOF） method, and their relationships to the Pacific basin scale oscillations are examined. The first CSEOF mode of the SCS-SSH is a strongly phase-locked annual cycle that is modulated by a slowly varying principal component（PC）; the strength of this annual cycle becomes reduced during El Ni？o events（at largest by 30% off in 1997/98） and enhanced during La Ni？a events. The second mode is a low frequency oscillation nearly on decadal time scale, with its spatial structure exhibiting an obscure month-dependence; the corresponding PC is highly correlated with the Pacific Decadal Oscillation（PDO） index.Five independent oscillations in the Pacific are isolated by using the independent component（IC） analysis（ICA）method, and their effects on the SCS-SSH are examined. It is revealed that the pure ENSO mode（which resembles the east Pacific ENSO） has little effect on the low frequency variability of the SCS-SSH while the ENSO reddening mode（which resembles the central Pacific ENSO） has clear effect. As the ENSO reddening mode is an important constituent of the PDO, this explains why the PDO is more important than ENSO in modulating the low frequency variability of SCS-SSH. Meridional saddle like oscillation mode, the Kuroshio extension warming mode, and the equatorial cooling mode are also successfully detected by the ICA, but they have little effect on the low frequency variability of the SCS-SSH. Further analyses suggest the Pacific oscillations are probably influencing the variability of the SCS-SSH in ways that are different from that of the sea surface temperature（SST） in the SCS.