| FENG Baoxin,LIU Hailong,LIN Pengfei,WANG Qi. 2017. Meso-scale eddy in the South China Sea simulated by an eddy-resolving ocean model. Acta Oceanologica Sinica, 36(5):9－25 |
| Meso-scale eddy in the South China Sea simulated by an eddy-resolving ocean model |
| 涡分辨率模式模拟的南海中尺度涡旋 |
| Received:March 02, 2016 |
| DOI：10.1007/s13131-017-1058-3 |
| Key words:mesoscale eddy eddy-resolving ocean general circulation model South China Sea |
| 中文关键词: 中尺度涡旋 涡分辨率海洋环流模式 中国南海 |
| 基金项目:The National Key Program for Developing Basic Science of China under contract No. 2013CB956204; the National Natural Science Foundation of China under contract Nos 41275084 and 41575084; the Strategic Priority Research of the Chinese Academy of Science under contract No.XDA 11010304. |
| Author Name | Affiliation | E-mail | | FENG Baoxin | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China | | | LIU Hailong | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China | lhl@lasg.iap.ac.cn | | LIN Pengfei | State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China | | | WANG Qi | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China | |
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| Abstract: |
| Mesoscale eddies (MEs) in the South China Sea (SCS) simulated by a quasi-global eddy-resolving ocean general circulation model are evaluated against satellite data during 1993-2007. The modeled ocean data show more activity than shown by the satellite data and reproduces more eddies in the SCS. A total of 345 (428) cyclonic eddies (CEs) and 330 (371) anti-cyclonic eddies (AEs) generated for satellite (model) data are identified during the study period, showing increase of~24% and~12% for the model data, respectively. Compared with eddies in satellite, the simulated eddies tend to have smaller radii, larger amplitudes, a slightly longer lifetime, faster movement and rotation speed, a slightly larger nonlinear properties (U/c) in the model. However, the spatial distribution of generated eddies appears to be inhomogeneous, with more CEs in the northern part of SCS and fewer AEs in the southern part. This is attributed to the exaggerated Kuroshio intrusion in the model because the small islands in the Luzon Strait are still not well resolved although the horizontal resolution reaches (1/10)°. The seasonal variability in the number and the amplitude of eddies generated is also investigated. |
| 中文摘要: |
| 我们利用准全球的涡分辨率海洋环流模式对1993到2007年期间的模式模拟的和卫星资料的中尺度涡旋进行了评估。海洋模式中的涡旋活动要比卫星资料的涡旋活动更积极，并且模式模拟的涡旋数量要偏多一些。在我们研究的期间内，一共有345（428）个气旋式涡旋和330（371）个反气旋式涡旋被辨别出来，表明了模式要比观测多约24%的气旋式涡旋和约12%的反气旋式涡旋。与卫星资料中的涡旋相比，模式模拟的涡旋拥有偏小的半径、偏强的强度、略微长一些的生命史、较快的移动速度和旋转速度以及略微强一些的非线性性质。然而，模式模拟的涡旋在生成位置的空间分布方面具有着不均匀性：与卫星资料的涡旋相比，更多的气旋式涡旋生成在南海北部，而较少一些的反气旋式涡旋生成在南海南部。这可能是因为模式在南海北部有着较强的黑潮入侵。尽管海洋模式的精度已经提到到0.1度，但是吕宋海峡附近的地形依旧没有完全模拟好，在吕宋海峡处缺少一些岛屿。我们对中尺度涡旋的生成数量和强度的季节变化也进行了研究。 |
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