斜压强迫驱动的太阳较差自转
Solar differential rotation driven by baroclinic forcing
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中文总结 AI 辅助
研究太阳较差自转起源，针对对流难题，通过对旋转球壳进行流体动力学模拟，发现各种热分层下能产生类似太阳的较差自转，提出了太阳较差自转起源的替代方案，以解释此前差异。
中文摘要 AI 辅助
近期观测与数值模拟的结合对太阳内部是否以强烈的湍流对流为特征这一问题提出了质疑，即所谓的对流难题。鉴于可能不存在剧烈对流运动，我们研究了太阳较差自转，此前认为它与雷诺应力紧密相关，现在考虑它是否可能由热成风平衡中背景纬度熵梯度的存在来维持。通过对代表太阳对流区主体的旋转球壳进行全球流体动力学模拟，我们证明了在各种热分层条件下都能产生类似太阳的较差自转。这项工作为太阳较差自转的起源提出了一种替代方案，以适应先前报道的差异。
英文摘要
A combination of recent observations and numerical simulations has called into question whether Sun's interior is characterized by strong turbulent convection, a problem known as convective conundrum. In light of a possible absence of vigorous convective motions, we examine whether the Sun's differential rotation, previously assumed to be tightly coupled to Reynolds stresses, may instead be sustained by the presence of a background latitudinal entropy gradient in thermal wind balance. By performing global hydrodynamical simulations of a rotating spherical shell representing the bulk of the solar convection zone, we demonstrate that solar-like differential rotation can be generated under a variety of thermal stratifications. This work proposes an alternative scenario for the origin of solar differential rotation that accommodates the previously reported discrepancies.
