Abstract

We present the results of our numerical simulations of the general circulation in the atmosphere of a hypothetical super-Earth within a model based on the solution of the complete system of hydrodynamic equations. The MIPT/PGI GCM model used for our computations has already been successfully adopted to describe the general circulation of the atmosphere of Venus. The model features high resolution and the absence of linear viscosity. The atmospheric gas is a mixture of gases in some constant proportion and the influence of the aerosol component on the equation of state may be neglected. The Newtonian relaxation scheme is used to describe the processes related to heat transfer. We have found that the westerly zonal superrotation, which can manifest itself in the form of equatorial and two mid-latitude jets, is the main mechanism of circulation in the atmosphere. The positions and intensities of the mid-latitude jets are largely determined by the molecular weight of the atmosphere and the equator–pole temperature contrast. We show the trends reflecting these changes. In the case of a tidally locked super-Earth we also detect a stable equatorial jet perturbed by a Kelvin wave. The intensity of the perturbations has been found to increase with decreasing molecular weight of the atmosphere. We perform our simulations in the framework of a simple greenhouse model.

中文翻译：

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使用非静水一般环流模型模拟潮汐锁定的超地球绕低质量的主恒星运行

摘要

我们在一个完整的流体动力学方程组解的基础上，给出了一个模型中一个假设的超地球大气中一般环流的数值模拟结果。用于我们计算的MIPT / PGI GCM模型已经成功地用于描述金星大气的总体循环。该模型具有高分辨率，并且没有线性粘度。大气气体是某种恒定比例的气体混合物，可以忽略气溶胶成分对状态方程的影响。牛顿松弛方案用于描述与传热有关的过程。我们发现西风带超旋以赤道和两个中纬度射流的形式表现出来，是大气中循环的主要机制。中纬度射流的位置和强度在很大程度上取决于大气的分子量和赤道与极点的温度对比。我们展示了反映这些变化的趋势。在潮汐锁定的超级地球的情况下，我们还检测到开尔文波扰动的稳定赤道射流。已经发现扰动的强度随着大气分子量的降低而增加。我们在一个简单的温室模型框架内进行仿真。在潮汐锁定的超级地球的情况下，我们还检测到开尔文波扰动的稳定赤道射流。已经发现扰动的强度随着大气分子量的降低而增加。我们在一个简单的温室模型框架内进行仿真。在潮汐锁定的超级地球的情况下，我们还检测到开尔文波扰动的稳定赤道射流。已经发现扰动的强度随着大气分子量的降低而增加。我们在一个简单的温室模型框架内进行仿真。