| Sub-seasonal variability of Luzon Strait Transport in a high resolution global model |
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| 作者姓名： | ZHANG Zhengguang ZHAO Wei LIU Qinyu |
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| 作者单位： | Physical Oceanography Laboratory, Ocean University of China Qingdao 266100, China |
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| 基金项目： | The Ministry of Science and Technology of China (National Key Program for Developing Basic Science) under contract No. 2007CB411803; the National 863 High-tech Program under contract No. 2008AA09A402. |
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| 摘 要： | The Luzon Strait is the main impact pathway of the Kuroshio on the circulation in South China Sea (SCS). Based on the analysis of the 1997–2007 altimeter data and 2005–2006 output data from a high resolution global HYCOM model, the total Luzon Strait Transport (LST) has remarkable subseasonal oscillations with a typical period of 90 to 120 days, and an average value of 1.9 Sv into SCS. Further spectrum analysis shows that the temporal variability of the LST at different depth is remarkable different. In the upper layer (0–300 m), westward inflow has significant seasonal and subseasonal variability. In the bottom layer (below 1 200 m), eastward outflow exhibits remarkable seasonal variability, while subseasonal variability is also clear. In the intermediate layer, the westward inflow is slightly bigger than the eastward outflow, and both of them have obvious seasonal and subseasonal variability. Because the seasonal variation of westward inflow and eastward outflow is opposite, the total transport of intermediate layer exhibits significant 50–150 days variation, without obvious seasonal signals. The westward Rossby waves with a period of 90 to 120 days in the Western Pacific have very clear correlationship with the Luzon Strait Transport, this indicates that the interaction between these westward Rossby waves and Kuroshio might be the possible mechanism of the subseasonal variation of the LST.
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| 关 键 词： | 季节性变化 吕宋海峡 高分辨率 运输 全球模式 变异 Rossby波 地表温度 |
| 收稿时间： | 25 June 2010 |
| 修稿时间： | 2009/12/18 0:00:00 |
Sub-seasonal variability of Luzon Strait Transport in a high resolution global model |
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| ZHANG Zhengguang,ZHAO Wei,LIU Qinyu.Sub-seasonal variability of Luzon Strait Transport in a high resolution global model[J].Acta Oceanologica Sinica,2010,29(3):9-17. |
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| Authors: | ZHANG Zhengguang ZHAO Wei and LIU Qinyu |
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| Institution: | Physical Oceanography Laboratory, Ocean University of China Qingdao 266100, China |
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| Abstract: | The Luzon Strait is the main impact pathway of the Kuroshio on the circulation in South China Sea (SCS). Based on the analysis of the 1997-2007 altimeter data and 2005-2006 output data from a high resolution global HYCOM model, the total Luzon Strait Transport (LST) has remarkable subseasonal oscillations with a typical period of 90 to 120 days, and an average value of 1.9 Sv into SCS. Further spectrum analysis shows that the temporal variability of the LST at different depth is remarkable different. In the upper layer (0-300 m), westward inflow has significant seasonal and subseasonal variability. In the bottom layer (below 1 200 m), eastward outflow exhibits remarkable seasonal variability, while subseasonal variability is also clear. In the intermediate layer, the westward inflow is slightly bigger than the eastward outflow, and both of them have obvious seasonal and subseasonal variability. Because the seasonal variation of westward inflow and eastward outflow is opposite, the total transport of intermediate layer exhibits significant 50-150 days variation, without obvious seasonal signals. The westward Rossby waves with a period of 90 to 120 days in the Western Pacific have very clear correlationship with the Luzon Strait Transport, this indicates that the interaction between these westward Rossby waves and Kuroshio might be the possible mechanism of the subseasonal variation of the LST. |
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| Keywords: | Luzon Strait Transport subseasonal variability Rossby waves |
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