In the Earth's atmosphere, a zonal flow oscillation is observed with periods between 20 and 32 months, the Quasi Biennial Oscillation. This oscillation does not require an external time dependent source but is maintained by nonlinear wave momentum forcing. We propose that such a mechanism also drives long-period oscillations in planetary and stellar interiors, and we apply it here to generate a flow oscillation for the 22-year solar cycle. The oscillation would occur just below the convective envelope - in a region where gravity waves can propagate. We present results from a simplified analytical modal that incorporates Hines' gravity wave parameterization. Wave amplitudes <10 m/s can produce reversing zonal flows of 20 m/s that should be sufficient to generate a corresponding oscillation in the poloidal magnetic field. The low buoyancy frequency and associated increase in turbulence help produce the desired oscillation period of the flow and should help generate the currents for the reversing magnetic field. [References: 21]
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机译：在地球大气层中，观察到区域流振荡，周期为20到32个月，即准两年一次振荡。该振荡不需要外部时间相关源，而是通过非线性波动量强迫来保持。我们提出，这种机制还可以驱动行星和恒星内部的长期振荡，因此我们将其应用于此处，以产生22年太阳周期的流动振荡。振荡将发生在对流包络线的正下方-在重力波可以传播的区域。我们提出了一种简化的分析模型的结果，该模型结合了海因斯的重力波参数化。幅度小于10 m / s的波会产生20 m / s的反向纬向流，这应该足以在极向磁场中产生相应的振荡。低浮力频率和相关的湍流增加有助于产生所需的气流振荡周期，并应有助于产生用于反向磁场的电流。 [参考：21]
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