Numerical studies of type 2 equatorial electrojet irregularity development
Numerical studies of type 2 equatorial electrojet irregularity development
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2型赤道电射流不规则发展的数值研究
DOI：
10.1029/rs010i003p00247
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发表时间：
1975
期刊：
影响因子：
--
通讯作者：
R. Sudan
中科院分区：
文献类型：
--
作者：
B. Mcdonald;T. Coffey;S. Ossakow;R. Sudan
流体运动方程的基础上的计算机模拟似乎占短波长2型（亚音速传播）电离不规则性赤道电射流的基本观测功能。短波长（小于28米的参数在这里）被激发后，只有长波长，水平传播波增长到足以触发二次垂直传播模式的非线性增长的幅度。其结果是一个复杂的二维湍流，对流元素以相当的垂直和水平速度移动。密度涨落功率谱近似服从幂律κ−3.5。这些结果与理论和观测相一致。
A computer simulation based on fluid equations of motion seems to account for basic observational features of short wavelength type 2 (subsonically propagating) ionization irregularities in the equatorial electrojet. The short wavelengths (less than 28 m for parameters taken here) are excited only after long wavelength, horizontally propagating waves grow to an amplitude sufficient to trigger the nonlinear growth of secondary vertically propagating modes. The result is a complicated two-dimensional turbulent flow, with convective elements moving with comparable vertical and horizontal velocities. The density fluctuation power spectrum obeys approximately a power law κ−3.5. These results agree with theory and observation.