中文摘要：

根据到 2004 年 1 月的从 1992 年 10 月的海平面异例数据集的地图，有大约 500 d 的时期的显著低频率变化从 160 ° W 在 20 ° N 附近在区域被检测到 130 ° E。一个线性二层的模特儿被雇用解释机制。在在西北太平洋的 20 ° N 的第一模式的长 baroclinic Rossby 波浪以大约 10 的速度在免费波浪形式向西宣传，这被发现。3 cm/s。当 baroclinic Rossby 飘动，这证实观察低频率可变性出现。它进一步证明在在西北太平洋的 20 ° N 附近的这些低频率可变性能潜在地被预言与一 lead up to 900 d。

英文摘要：

On the basis of maps of sea level anomalies data set from October 1992 to January 2004, pronounced low frequency variations with periods of about 500 d are detected in the area near 20°N from 160°W to 130°E. A linear two-layer model is employed to explain the mechanism. It is found that the first-mode long baroclinic Rossby waves at 20°N in the northwest Pacific propagate westward in the form of free waves at a speed of about 10.3 cm/s. This confirms that the observed low frequency variabilities appear as baroclinic Rossby waves. It further shows that these low frequency variabilities around 20°N in the northwest Pacific can potentially be predicted with a lead up to 900 d.