Observed Ocean Variability in the Mindanao Dome Region
Observed Ocean Variability in the Mindanao Dome Region
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DOI：
10.1175/2010jpo4329.1
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发表时间：
2011-02
影响因子：
3.5
通讯作者：
Y. Kashino;A. Ishida;S. Hosoda
中科院分区：
文献类型：
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作者：
Y. Kashino;A. Ishida;S. Hosoda
摘要利用三角跨洋浮标网（TRITON）浮标在8°N，137°E; 5°N，137 °E和8°N，130°E的水下传感器数据，研究了菲律宾海南部棉兰老岛穹（MD）地区半年、一年和年际时间尺度的海洋变化。年信号在MD区域300米深度以上占主导地位。在5°N，137°E，从冬季到春季，在100-200 m深度观测到超过35 psu的盐水，这似乎与北赤道逆流在这些季节的纬向迁移有关。温跃层上升，可能与MD，也观察到从北方冬季到春季。过去的研究表明，局地风的年变是5°N MD年变的一个重要机制。然而，8°N的年变率似乎是源于150°W以西的Rossby波，而不是当地风的影响。同时也观察到了半年变化，其幅度可达全年的40%~ 70%。
Abstract Ocean variations at semiannual, annual, and interannual time scales in the Mindanao Dome (MD) region of the southern Philippine Sea were examined using data derived from underwater sensors on Triangle Trans-Ocean Buoy Network (TRITON) buoys at 8°N, 137°E; 5°N, 137°E; and 8°N, 130°E. Annual signal dominated above 300-m depth in the MD region. At 5°N, 137°E, saline water exceeding 35 psu was observed at 100–200-m depth from boreal winter to spring, seemingly associated with the meridional migration of the North Equatorial Countercurrent during these seasons. Thermocline ascent, probably related to the MD, was also observed from boreal winter to spring. An important mechanism of the annual variation of the MD at 5°N seems to be the annual variability of local wind, as mentioned in past studies. However, annual variability at 8°N seems to be due to Rossby waves originating west of 150°W rather than to local wind effects. Semiannual variation was also observed, with its amplitude reaching 40%–70% of t...