ANALYTICAL SOLUTION FOR WAVES IN PLANETS WITH ATMOSPHERIC SUPERROTATION. I. ACOUSTIC AND INERTIA-GRAVITY WAVES
ANALYTICAL SOLUTION FOR WAVES IN PLANETS WITH ATMOSPHERIC SUPERROTATION. I. ACOUSTIC AND INERTIA-GRAVITY WAVES
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大气超自转行星中波的分析解。
DOI：
10.1088/0067-0049/213/1/17
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. López‐Valverde
中科院分区：
文献类型：
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作者：
Javier Peralta;Takeshi Imamura;Peter L. Read;David Luz;A. Piccialli;M. López‐Valverde
这篇论文是一个由两部分组成的研究的第一部分，该研究致力于开发工具，对具有大气超自转的缓慢自转行星上预期的各种大气波进行系统分类。我们从旋转区的原始方程出发，导出了可能的波动的解析解，同时考虑了离心力和背景风的经向切变度规的影响。在满足高度多尺度法条件的情况下，当背景风的垂直切变存在时，这些波解也是有效的。共发现了六种类型的波，并根据相应的频散关系和波结构表征了它们的性质。在第一部分中，只研究作为一般色散关系的直接解的波-声波和惯性重力波。对于惯性重力波，我们发现，在水平波长较短、背景风为零或在赤道区传播的情况下，只有纯重力波是可能的，而对于水平波长较大和/或静稳定度为零的情况，波是惯性的。我们还研究了经典大气近似和波滤波之间的对应关系，并对金星大气不同垂直高度的云中发现的中尺度波进行了分类。最后，我们讨论了系外行星中波的分类，并提供了一个可能的具有回旋制度的候选者名单。
This paper is the first of a two-part study devoted to developing tools for a systematic classification of the wide variety of atmospheric waves expected on slowly rotating planets with atmospheric superrotation. Starting with the primitive equations for a cyclostrophic regime, we have deduced the analytical solution for the possible waves, simultaneously including the effect of the metric terms for the centrifugal force and the meridional shear of the background wind. In those cases when the conditions for the method of the multiple scales in height are met, these wave solutions are also valid when vertical shear of the background wind is present. A total of six types of waves have been found and their properties were characterized in terms of the corresponding dispersion relations and wave structures. In this first part, only waves that are direct solutions of the generic dispersion relation are studied—acoustic and inertia-gravity waves. Concerning inertia-gravity waves, we found that in the cases of short horizontal wavelengths, null background wind, or propagation in the equatorial region, only pure gravity waves are possible, while for the limit of large horizontal wavelengths and/or null static stability, the waves are inertial. The correspondence between classical atmospheric approximations and wave filtering has been examined too, and we carried out a classification of the mesoscale waves found in the clouds of Venus at different vertical levels of its atmosphere. Finally, the classification of waves in exoplanets is discussed and we provide a list of possible candidates with cyclostrophic regimes.