论文标题
旋转对太阳对流的影响
The rotational influence on solar convection
论文作者
论文摘要
本文考虑了太阳对流区域内的主要动态，热和旋转平衡。原因是：科里奥利强迫压力梯度平衡。背景涡流拉伸，斜压扭矩和非线性对流平衡。湍流传达了辐射扩散不能的太阳光度的哪一部分。这四个关系确定了严格地对已知物理量的主要长度尺度和动态振幅的估计值。我们预测，对流的动态rossby数小于近表面剪切层以下的统一数，表明旋转约束强。我们还预测整个对流区域的特征对流长度大约为30毫米。这些推论有助于解释最近的观察结果，这些观察结果揭示了100-200毫米尺度下的流动幅度较弱。
This paper considers the dominant dynamical, thermal and rotational balances within the solar convection zone. The reasoning is such that: Coriolis forces balance pressure gradients. Background vortex stretching, baroclinic torques and nonlinear advection balance jointly. Turbulent fluxes convey what part of the solar luminosity that radiative diffusion cannot. These four relations determine estimates for the dominant length scales and dynamical amplitudes strictly in terms of known physical quantities. We predict that the dynamical Rossby number for convection is less than unity below the near-surface shear layer, indicating strong rotational constraint. We also predict a characteristic convection length scale of roughly 30 Mm throughout much of the convection zone. These inferences help explain recent observations that reveal weak flow amplitudes at 100-200 Mm scales.
