| 黑潮入侵优化对南海北部中尺度涡旋模拟的影响 |
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| 引用本文： | 封宝鑫,刘海龙,林鹏飞.黑潮入侵优化对南海北部中尺度涡旋模拟的影响[J].海洋学报(英文版),2020,39(3):12-24. |
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| 作者姓名： | 封宝鑫 刘海龙 林鹏飞 |
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| 作者单位： | 广东海洋大学, 海洋与气象学院, 湛江, 524000,中国科学院大气物理研究所, 大气科学和地球流体力学数值模拟国家重点实验室, 北京, 100029;中国科学院大学, 地球与行星科学学院, 北京, 100049,中国科学院大气物理研究所, 大气科学和地球流体力学数值模拟国家重点实验室, 北京, 100029 |
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| 基金项目： | The National Key R&D Program for Developing Basic Sciences under contract Nos 2016YFC1401401 and 2016YFC1401601; the National Natural Science Foundation of China under contract Nos 41576025, 41576026 and 41776030. |
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| 摘 要： | 基于高分辨率海洋环流模式，通过比较吕宋海峡处地形优化后的黑潮入侵形态和强度不同的试验，我们研究了黑潮入侵优化后对南海中尺度涡模拟的影响。我们发现黑潮入侵的减弱导致了涡旋活动的减弱，这使得模式结果与观测结果更为相近。在这种情况下，模式模拟的吕宋海峡西部及北部陆坡区域的涡动动能明显减弱。模式涡动动能的减弱与模式反气旋式涡数量的减少和气旋式涡强度的减弱有关。涡动动能收支的分析进一步表明，黑潮入侵的优化将通过改变水平速度切变和温跃层斜率来改变涡动动能，而这两个参数分别与正压和斜压不稳定性有关。前者在模式涡动动能减弱中起着更为重要的作用，而黑潮入侵导致的涡动动能的水平输送对吕宋海峡西部区域的能量收支同样起着重要的作用。
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| 关 键 词： | 南海 中尺度涡旋 黑潮入侵 吕宋海峡 |
| 收稿时间： | 2019/7/10 0:00:00 |
Effects of Kuroshio intrusion optimization on the simulation of mesoscale eddies in the northern South China Sea |
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| Feng,Baoxin,Liu,Hailong,Lin,Pengfei.Effects of Kuroshio intrusion optimization on the simulation of mesoscale eddies in the northern South China Sea[J].Acta Oceanologica Sinica,2020,39(3):12-24. |
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| Authors: | Feng Baoxin Liu Hailong Lin Pengfei |
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| Institution: | 1.College of Ocean and Meteorology, Guangdong Ocean University, Zhanjiang 524000, China2.State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China3.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The impacts of Kuroshio intrusion (KI) optimization on the simulation of meso-scale eddies (MEs) in the northern South China Sea (SCS) were investigated based on an eddy-resolving ocean general circulation model by comparing two numerical experiments with differences in their form and intensity of KI due to the optimizing topography at Luzon Strait (LS). We found that a reduced KI reduces ME activities in the northern SCS, which is similar to the observations. In this case, the biases of the model related to simulating the eddy kinetic energy (EKE) west of the LS and along the northern slope are remarkably attenuated. The reduced EKE modeling bias is associated with both the reduced number of anti-cyclonic eddies (AEs) and the reduced amplitude of cyclonic eddies (CEs). The EKE budget analysis further suggests that the optimization of the KI will change the EKE by changing the horizontal velocity shear and the slope of the thermocline, which are related to barotropic and baroclinic instabilities, respectively. The former plays the key role in regulating the EKE in the northern SCS due to the changing of the KI. The EKE advection caused by the KI is also important for the EKE budget to the west of the LS. |
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| Keywords: | South China Sea meso-scale eddy Kuroshio intrusion Luzon Strait |
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