On the Catalytic Role of High Baroclinic Modes in Eddy-driven Large-Scale Circulations
On the Catalytic Role of High Baroclinic Modes in Eddy-driven Large-Scale Circulations
复制标题
论高斜斜模式在涡驱动大尺度环流中的催化作用
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
B. Hua
中科院分区：
文献类型：
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作者：
B. Barnier;C. Provost;B. Hua
本文研究了大尺度流动模拟中涡尺度分辨率的三维一致性问题。本文用一个多层准地转模式研究了典型的风强迫涡驱动双涡旋环流的产生。在垂直方向上选择了六层来保证斜压不稳定的辐合。重点是高斜压模态的分辨率及其对中纬度急流动力学的影响。几个涡分辨实验，除了水平分辨率相同，这可以是低（20公里）或高（10公里），进行了比较。在每一个实验中，与第一和第二斜压模态有关的尺度都得到了很好的分辨，但与第三和更高的斜压模态有关的尺度只有在10公里的实验中才能分辨。为了更好地说明高垂直模态的重要性，进行了具有与六层实验相当的配置的三层实验。注意th.
Abstract This paper investigates the tridimensional consistency of the resolution of eddy scales in simulating large-scale flows. The generation of classical wind-forced, eddy-driven double-gyre circulation is investigated with a multilayered quasi-geostrophic model. Six-layers on the vertical have been chosen to assure the convergence of the baroclinic instability. Emphasis is on the resolution of the high baroclinic modes and its effects on the dynamics of the midlatitude jet. Several eddy-resolving experiments, identical except for the horizontal resolution, which can be low (20 km) or high (10 km), are compared. In every experiment, the scales associated with the first and second baroclinic modes are well resolved, but those associated with the third and higher baroclinic modes are so only in 10-km experiments For a better illustration of the importance of the high vertical modes, three-layer experiments having configurations equivalent to that of the six-layer experiments have been conducted. Note th...