电离层e区非线性孤立波

A.A Arykov, Yu.P Maltsev
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引用次数: 3

摘要

研究了一维孤立非均匀性的非线性波动方程。它类似于扩散方程,扩散系数取决于相速度。相速度反过来又取决于电子密度。微弱的不均匀性以接近电漂移的速度移动。如果该速度超过离子声速,则有效扩散为负,不均匀性增大和收缩。非均匀性增长的速度变小。它从背面吸收更弱和更快的移动不均匀性。在静止状态下,电离层将充满罕见但强烈的背面尖锐的不均匀性。
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Nonlinear solitary wave in the ionospheric E-region

A nonlinear wave equation for a solitary one-dimensional inhomogeneity is studied. It is similar to the diffusion equation with the diffusion coefficient depending on the phase velocity. The phase velocity depends, in turn, on the electron density. A weak inhomogeneity moves with the velocity close to that of the electric drift. If this velocity exceeds the ion acoustic speed the effective diffusion is negative, and the inhomogeneity grows and contracts. The velocity of the growing inhomogeneity becomes smaller. It absorbs weaker and faster moving inhomogeneities from the back side. In a stationary regime, the ionosphere will be filled with rare but strong inhomogeneities with sharp back sides.

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