| 湍流动能闭合方法在区域气候模式中的应用 |
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| 引用本文： | 郑益群,苗曼倩,钱永甫.湍流动能闭合方法在区域气候模式中的应用[J].气象学报,1999,57(6):641-650. |
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| 作者姓名： | 郑益群 苗曼倩 钱永甫 |
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| 作者单位： | 南京大学大气科学系!南京２１００９３ |
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| 基金项目： | 国家科技攻关项目！96—908—02—04—04 |
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| 摘 要： | 利用湍流动能闭合方法改进了区域气候模式（ＲｅｇＣＭ２）中边界层的参数化过程，并用资料进行了数值试验。结果表明．采用该方法可以较好地描述边界层的物理过程，温度、位势高度、比湿等物理量场的模拟均有不同程度的改善，提高了边界层计算的精度。该工作还对模式中边界层高度的计算作了改进，使边界层高度的日变化及高度极值都更符合实际情况。
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| 关 键 词： | 湍流动能闭合 边界层 区域气候模式 |
| 收稿时间： | 1998/8/26 0:00:00 |
| 修稿时间： | 1999/4/26 0:00:00 |
TURBULENCE KINETIC ENERGY CLOSURE SCHEME APPLIED INTO REGIONAL CLIMATE MODELING |
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| Zheng Yiqun,Miao Manqian and Qian Yongfu.TURBULENCE KINETIC ENERGY CLOSURE SCHEME APPLIED INTO REGIONAL CLIMATE MODELING[J].Acta Meteorologica Sinica,1999,57(6):641-650. |
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| Authors: | Zheng Yiqun Miao Manqian and Qian Yongfu |
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| Institution: | Department of Atmospheric Sciences. Nanjing Uniuersity, Nanjing 210093;Department of Atmospheric Sciences. Nanjing Uniuersity, Nanjing 210093;Department of Atmospheric Sciences. Nanjing Uniuersity, Nanjing 210093 |
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| Abstract: | The boundary layer parameterization scheme in regional climate model (RegCM2) is improved by applying turbulence kinetic energy (TKE) closure scheme. The NCEP/NCARreanalysis data of 1991 is employed to test the effects of the TKE closure scheme on regionalclimate modeling. The results show :After employing TKE closure scheme, the physical process in boundary layer can bedescribed more realistically. The simulation of the geo-potential height field and temperaturefield etc. are obviously improved, especially. the more distinct improvements occurs in thetemperature field and specific humidity field of lower levels that are directly effect by boundary layer parameterization scheme.An improving can also be made on calculating the height of boundary layer, the resultshows that the diurnal variation and the diurnal extreme of boundary layer height can be described more reasonable. |
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| Keywords: | Turbulence kinetic energy closure scheme Boundary layer Regional climate simulation |
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