| 摘要: |
| 基于HYCOM模式，以OFES资料为参考，分析了KPP、MY2.5、KT三种不同混合方案对北太平洋西边界流系的模拟能力的影响。结果表明：三种不同混合方案模拟的上层海洋平均流场与OFES资料相似，但在流向和流幅上略有差异，其中KPP方案模拟的流速同OFES资料最为接近，MY2.5方案次之，KT方案与其差别最大。通过选取代表断面对北赤道流，棉兰老流，棉兰老潜流，黑潮的模拟进行比较，就流场而言，KPP方案模拟的效果同前人的观测和研究要最为接近。分析了北赤道流，棉兰老流，棉兰老潜流，黑潮的流量的季节变化特征，其中KPP方案与OFES资料计算的棉兰老流和棉兰老潜流的季节变化特征与前人描述比较一致，表现为春强秋弱。KPP方案和OFES资料的计算结果表明北赤道流和棉兰老流大致上是同向变化的，而在冬季棉兰老流同黑潮的变化基本上是一致的。 |
| 关键词: 垂向混合方案 HYCOM 北太平洋西边界流系 流量 季节变化 |
| DOI：10.11759/hykx20160314003 |
| 分类号:P731.27 |
| 基金项目:国家重点基础研究发展计划（973计划）；教育部科学技术研究项目 |
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| Effects of three vertical mixing schemes on HYCOM simulations of the North Pacific Western Boundary Current System |
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Li Li,Wang Yan and Cui Fengjuan
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Ocean University of China,College of Oceanic and Atmospheric Sciences, Ocean University of China,North China Sea Data DdDd Information Service of the State Oceanic Administration
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| Abstract: |
| Based on OFES (OGCM for the Earth Simulator) and the simulations of the north Pacific western boundary current system via HYCOM, the performances of three different kinds of vertical mixing schemes are compared. They are the K-Profile Parameterization (KPP) scheme, the Kraus and Turner (KT) scheme and the Mellor-Yamada level 2.5 (MY2.5) scheme. The flow distributions of upper ocean that they simulate are all similar with OFES in the North Pacific, but there are slight mismatches in the flow direction and region. The KPP scheme simulates the best compared with OFES and the KT scheme simulates the worst. Compared the typical section of North Equatorial Current (NEC), Kuroshio Current (KC) and Mindanao Current (MC), the KPP scheme showed the best result, which are more similar to the previous research. Used the three simulation results of different mixing schemes and OFES data, the seasonal volume transport of NEC, KC, MC and MUC are estimated. Both the KPP scheme and OFES reflect the signal that the MC have a seasonal maximum transport in spring (March to May) and a minimum transport in fall (September to November), and the MUC has the homologous trend. Furthermore, both the KPP scheme and OFES demonstrate the signal that the MC and NEC vary in the same phase, while the KC and MC vary in the same phase only in winter. |
| Key words: vertical mixing scheme HYCOM north Pacific western boundary current system volume transport seasonal variation |