Abstract

The stability of a layer of moist air above a heated surface of land or ocean is studied under the sudden influence of internal sources of heat release, which depend on the pressure and density. A dispersion equation is obtained for small 3D perturbations in a rotating atmosphere. It contains the previously known waves (acoustic, internal waves, and Brunt–​​Väisälä waves) and makes it possible to obtain a modified criterion for the onset of convective instability. This dispersion equation also makes it possible to study the effect of internal heat release on the dynamics of perturbation in these waves, including the conditions for the occurrence of instability generated by an atmospheric electric discharge. Taking into account new considered effects can lead to the identification of new instabilities and the modification of the previously known ones. The proposed system of equations allows numerical calculations of vortex flows in moist air in the near-surface layer and a more detailed study of the mechanisms of the beginning of hurricanes and tornadoes.

中文翻译：

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地球潮湿大气中局部放热源引起的扰动动力学

摘要

在内部热量释放源的突然影响下，研究了陆地或海洋加热表面上方的潮湿空气层的稳定性，该热量取决于压力和密度。对于旋转环境中的3D微扰，可以获得色散方程。它包含先前已知的波（声波，内波和Brunt-Väisälä波），并有可能获得对流不稳定性发作的修改标准。该色散方程还可以研究内部热量释放对这些波中扰动动力学的影响，包括大气放电产生的不稳定性发生的条件。考虑到新的考虑到的影响可以导致新的不稳定性的识别和对先前已知的不稳定性的修改。拟议的方程组可以对近表层潮湿空气中的涡流进行数值计算，并可以更详细地研究飓风和龙卷风的发生机理。