Seasonal near-surface dynamics and thermodynamics of the Indian Ocean and Indonesian Throughflow in a global Ocean general circulation Model
Seasonal near-surface dynamics and thermodynamics of the Indian Ocean and Indonesian Throughflow in a global Ocean general circulation Model
复制标题
全球大洋环流模型中印度洋和印度尼西亚穿流的季节近地表动力学和热力学
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Wijffels
中科院分区：
文献类型：
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作者：
A. Schiller;J. S. Godfrey;P. McIntosh;G. Meyers;S. Wijffels
摘要利用一个具有增强热带分辨率的全球海洋环流模式（OGCM），对印度洋的近地表动力学和热力学进行了研究。该模式使用了西格尔型热通量公式（弱松弛对一个固定的SST，通量校正对季节观测值）。由此产生的季节性模式的表面热通量，混合层深度，和表面立体高度都比较好，在印度洋的观测，远离西部边界。在顶部700 m处，印度尼西亚平均海流中的流量分布得到了很好的模拟。印度尼西亚模式的通流平均从太平洋输送到印度洋的流量为16.3 × 106 m3 s-1，其量级可以通过瞬时的Sverdrup版本的“岛屿规则”很好地预测。模型地转运输相对于700米是相当小的，具有不同的季节性周期。虽然模式模拟的结果与实际情况相符，但实际观测的地转输送比模式模拟的要小。
Abstract The near-surface dynamics and thermodynamics of the Indian Ocean are examined in a global ocean general circulation model (OGCM) with enhanced tropical resolution. The model uses a Seager-type heat flux formulation (weak relaxation toward a fixed SST, flux-corrected toward seasonal observed values). Resulting seasonal patterns of surface heat flux, mixed layer depth, and surface steric height all compare quite well with observations in the Indian Ocean, away from western boundaries. Distribution of flow in the mean Indonesian Throughflow is quite well simulated in the top 700 m. The model Indonesian throughflow transports, on average, 16.3 × 106 m3 s−1 from the Pacific to the Indian Ocean, and its magnitude is fairly well predicted seasonally by the instantaneous Sverdrup version of the “Island Rule.” Model geostrophic transports relative to 700 m are substantially smaller, with a different seasonal cycle. Observed geostrophic transports are smaller than those in the model, though the model repro...