| 摘要: |
| 给出了3个通量矢量,从而将非线性平流项表示为3个通量矢量的旋度和散度,它们分别对纬向风和经向风的低频加速产生贡献。经过卷积运算,还建立了低频变化的动力学模型。给出了通量矢量B·、G1·、G2·等的空间分布及其相应的流函数与势函数的水平分布和时间演变,从而指出,瞬变扰动间的相互作用对流动具有低频加速作用。 |
| 关键词: 扰动间相互作用 通量矢量 低频加速 |
| DOI： |
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| THE INTERACTIONS BETWEEN DISTURBANCES, FLUX VECTORS AND LOW FREQUENCY ACCELERATION OF AIR FLOW |
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Guan Zhaoyong, Xu Jianjun
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Nanjing Institute of Meteorology, Nanjing, 210044
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| Abstract: |
| By defining three flux vectors, the nonlinear advection terms in momentum equations are written into vorticity and divergence terms of the three vectors, which indicates that the vorticity or divergence can cause zonal or meridional wind to accelerate at the low frequency time scale. By convolving the momentum equations, the dynamical model is given to describe the low frequency oscillations. The low frequency flux vectors and the stream function and potential function of them are computed, which show us the interesting features of their spatial distribution and time variation. |
| Key words: Interactions between disturbances Flux vectors Low frequency acceleration |
