Tropical cyclone (TC) intensification under sheared environmental conditions has garnered significant attention in recent studies. The alignment of TC vortices in the vertical is recognized as a critical factor in the rapid intensification process. However, the mechanisms responsible for vortex alignment remain elusive. In this study, we utilize the high-resolution simulation of Super Typhoon Rammasun (2014) to investigate the evolution of vertical tilt, with a specific focus on the role of asymmetric convection. Our results reveal a structural transition from a misaligned vortex before the onset of rapid intensification to an aligned structure afterward. It is found that the diabatic heating, driven by the asymmetric convection, plays a pivotal role in counteracting the steering effect and offsetting the vertical tilt. We also demonstrate that asymmetric convection in the upshear quadrant significantly enhances the reduction of vertical tilt. Our findings highlight the importance of the direct effect of diabatic heating on the tilt reduction of the simulated TC.

中文翻译：

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模拟台风 Rammasun（2014）在中等垂直切变下快速增强期间的涡旋排列

剪切环境条件下的热带气旋（TC）增强在最近的研究中引起了人们的广泛关注。 TC 涡流的垂直排列被认为是快速强化过程的关键因素。然而，负责涡旋排列的机制仍然难以捉摸。在这项研究中，我们利用超强台风拉马森（2014）的高分辨率模拟来研究垂直倾斜的演变，特别关注不对称对流的作用。我们的结果揭示了从快速增强开始之前的错位涡旋到之后的对齐结构的结构转变。研究发现，由不对称对流驱动的非绝热加热在抵消转向效应和抵消垂直倾斜方面起着关键作用。我们还证明，上剪切象限中的不对称对流显着增强了垂直倾斜的减少。我们的研究结果强调了非绝热加热对模拟 TC 倾斜减少的直接影响的重要性。