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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
Abstract：Based on the Sea Surface Height (SSH) data from TOPEX/POSEIDON mission data and eddy resolving global ocean model POP output data during 3 years, the power spectrum and the maximum entropy methods are used in the analysis. The results reveal that, the quasi-30 day oscillation appears on both sides of the equator of the East Pacific (the east of 160°W) and in the zonal zones centering on 5°N and 5°S respectively; the quasi 90 and quasi 60 oscillations appear in the off equator region of the west and middle of the tropical Pacific (120°E~150°W), and the quasi 90 oscillations appear in both zonal zones, which center on 20°N and 20°S respectively and the oscillation is distinct in the west Pacific; quasi 60 oscillations appear in the off equator regions, which center on 10°N and 10°S respectively, and are more distinct in the North than the South. From the TOPEX/POSEIDON data, the quasi-60 oscillations appear in the middle equatoral Pacific(5°N5°S,170°W~120°W).
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基本信息:
DOI：10.16441/j.cnki.hdxb.1999.04.003
中图分类号:P731.23
引用信息:
[1]刘秦玉,王启.热带太平洋海平面高度季节内振荡的空间分布特征[J].青岛海洋大学学报(自然科学版),1999(04):549-555.DOI:10.16441/j.cnki.hdxb.1999.04.003.
基金信息:
国家自然科学基金
1999-10-15
1999-10-15