Proposed Wave Momentum Source for Generating the 22-Year Solar Cycle

作     者：Hans G. Mayr Hans G. Mayr

作者机构：NASA Goddard Space Flight Center Greenbelt USA 

出 版 物：《International Journal of Astronomy and Astrophysics》 (天文学与天体物理学国际期刊（英文）)

年 卷 期：2023年第13卷第2期

页      面：74-88页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Dynamo Models Apply Artificial Nonlinearity Wave Generated Nonlinear Terrestrial 2-Year Oscillation Model-Analogue Example Helioseismology Wave Source Proposed for Solar Cycle Mechanism 

摘      要：For the 22-year solar cycle oscillation there is no external time dependent source. A nonlinear oscillation, the solar cycle must be generated internally, and Babcock-Leighton models apply an artificial nonlinear source term that can simulate the observations—which leaves open the question of the actual source mechanism for the solar cycle. Addressing this question, we propose to take guidance from the wave mechanism that generates the 2-year Quasi-biennial Oscillation (QBO) in the Earth atmosphere. Upward propagating gravity waves, eastward and westward, deposit momentum to generate the observed zonal wind oscillation. On the Sun, helioseismology has provided a thorough understanding of the acoustic p-waves, which propagate down into the convective envelope guided by the increasing temperature and related propagation velocity. Near the tachocline with low turbulent viscosity, the waves propagating eastward and westward can produce an axisymmetric 22-year oscillation of the zonal flow velocities that can generate the magnetic solar dynamo. Following the Earth model, waves in opposite directions can generate in the Sun wind and magnetic field oscillations in opposite directions, the proposition of a potential solar cycle mechanism.