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根据三年卫星高度计（ＴＯＰＥＸ／ＰＯＳＥＩＤＯＮ）资料和涡分辨率的海洋环流（ＰＯＰ）模式模拟计算的海平面高度资料，利用功率谱和最大熵谱的方法，揭示了热带太平洋海平面高度季节内振荡的空间分布特征。研究表明：准３０ｄ 周期的振荡集中出现在东太平洋（１６０°Ｗ 以东）赤道两侧，分别以５°Ｓ和５°Ｎ 为中心的纬向带状域中；准９０ｄ 振荡出现在分别以２０°Ｓ和２０°Ｎ为中心的南北二个纬向带状域中，北太平洋西部振荡最明显；准６０ｄ 振荡集中出现在分别以１０°Ｎ和１０°Ｓ为中心的带状海域中，北太平洋比南太平洋更明显，但比准９０ｄ 振荡信号弱；从ＴＯＰＥＸ资料分析还发现在赤道中太平洋（５°Ｎ～５°Ｓ，１７０°Ｗ～１２０°Ｗ），准６０ｄ 振荡也较明显
Based on the three-year satellite altimetry (TOPEX / POSEIDON) data and the eddy-resolution ocean circulation (POP) model, we calculated the sea level data by using the power spectrum and the maximum entropy spectrum, revealing the intraseasonal oscillation of the tropical Pacific sea level The spatial distribution characteristics. The results show that quasi-90d oscillations occur in zonal bands centered on 5◦S and 5◦N respectively on both sides of the equator in the eastern Pacific (east of 160◦W) In the two north and south latitudinal zonal domains centered on 20 ° S and 20 ° N, the western part of the North Pacific oscillates the most obviously. The quasi-60d oscillations are concentrated in the banded sea areas centered at 10 ° N and 10 ° S respectively, The North Pacific is more obvious than the South Pacific, but weaker than the 90d oscillation signal. From the TOPEX data analysis, it is also found that in the mid-equatorial Pacific (5 ° N ~ 5 ° S, 170 ° W ~ 120 ° W)