| Wind-Driven Ocean Circulation in Shallow Water Lattice Boltzmann Model |
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| 作者姓名： | ZHONG Linhao FENG Shide GAO Shouting |
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| 作者单位： | [1]DepartmentofAtmosphericandOceanicScience,OceanUniversityofChina,Qingdao266003 [3]LaboratoryofCloud-PrecipitationPhysicsandSevereStorms（LACS），InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing1000293 [4]LaboratoryofCloud-PrecipitationPhysicsandSevereStorms（LACS）,InstituteofAtmosphericPhysics,ChineseAcademyofSciences,Beijing100029 |
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| 基金项目： | the One Hundred Talents Project of the Chinese Academy of Sciences，the Impacts of OceanLand-Atmosphere Interactions over the East Asian Monsoon Region on the Climate in China (EAMOLA)，国家杰出青年科学基金 |
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| 摘 要： | A lattice Boltzmann (LB) model with overall second-order accuracy is applied to the 1.5-layer shallow water equation for a wind-driven double-gyre ocean circulation. By introducing the second-order integral approximation for the collision operator, the model becomes fully explicit. In this case, any iterative technique is not needed. The Coriolis force and other external forces are included in the model with second-order accuracy, which is consistent with the discretized accuracy of the LB equation. The numerical results show correct physics of the ocean circulation driven by the double-gyre wind stress with different Reynolds numbers and different spatial resolutions. An intrinsic low-frequency variability of the shallow water model is also found. The wind-driven ocean circulation exhibits subannual and interannual oscillations, which are comparable to those of models in which the conventional numerical methods are used.
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| 关 键 词： | 玻尔兹曼点阵模型 二阶精确度 浅水函数 风-驱动海洋环流 雷诺兹数 |
Wind-driven ocean circulation in shallow water lattice Boltzmann model |
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| ZHONG Linhao,FENG Shide,GAO Shouting.Wind-Driven Ocean Circulation in Shallow Water Lattice Boltzmann Model[J].Advances in Atmospheric Sciences,2005,22(3):349-358. |
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| Authors: | Zhong Linhao Feng Shide Gao Shouting |
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| Institution: | Department of Atmospheric and Oceanic Science, Ocean University of China, Qingdao 266003,Laboratory of Cloud-Precipitation Physics and Severe Storms LACS,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029,Laboratory of Cloud-Precipitation Physics and Severe Storms LACS,Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029 |
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| Abstract: | A lattice Boltzmann (LB) model with overall second-order accuracy is applied to the 1.5-layer shallow water equation for a wind-driven double-gyre ocean circulation. By introducing the second-order integral approximation for the collision operator, the model becomes fully explicit. In this case, any iterative technique is not needed. The Coriolis force and other external forces are included in the model with second-order accuracy, which is consistent with the discretized accuracy of the LB equation. The numerical results show correct physics of the ocean circulation driven by the double-gyre wind stress with different Reynolds numbers and different spatial resolutions. An intrinsic low-frequency variability of the shallow water model is also found. The wind-driven ocean circulation exhibits subannual and interannual oscillations, which are comparable to those of models in which the conventional numerical methods are used. |
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| Keywords: | lattice Boltzmann shallow water equation wind-driven ocean circulation Reynolds number spatial resolution low-frequency variability |
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