The Effect of Initial Vortex Asymmetric Structure on Tropical Cyclone Intensity Change in Response to an Imposed Environmental Vertical Wind Shear
The Effect of Initial Vortex Asymmetric Structure on Tropical Cyclone Intensity Change in Response to an Imposed Environmental Vertical Wind Shear
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DOI：
10.1029/2023gl104222
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发表时间：
2023-08
影响因子：
5.2
通讯作者：
Qingze Gao;Yuqing Wang
中科院分区：
文献类型：
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作者：
Qingze Gao;Yuqing Wang
以往的研究探讨了环境垂直风切变（VWS）如何触发初始轴对称热带气旋（TC）涡旋的非对称结构以及TC强度如何响应。在这项研究中，初始涡不对称结构对TC强度变化的可能影响，以响应于强加的环境VWS基于理想化的全物理模型模拟进行了研究。结果表明，初始TC涡旋的非对称结构效应可以增强或抑制TC对环境VWS的初始减弱。当初始非对称结构与VWS诱导的非对称结构同相时，TC减弱将增强，反之亦然。我们的研究结果要求在数值天气预报模式和观测中真实地表示TC的初始非对称结构，以更好地解决TC中的非对称结构。
Previous studies have investigated how the environmental vertical wind shear (VWS) may trigger the asymmetric structure in an initially axisymmetric tropical cyclone (TC) vortex and how TC intensity changes in response. In this study, the possible effect of the initial vortex asymmetric structure on the TC intensity change in response to an imposed environmental VWS is investigated based on idealized full‐physics model simulations. Results show that the effect of the asymmetric structure in the initial TC vortex can either enhance or suppress the initial weakening of the TC in response to the imposed environmental VWS. When the initial asymmetric structure is in phase of the VWS‐induced asymmetric structure, the TC weakening will be enhanced and vice versa. Our finding calls for realistic representation of initial TC asymmetric structure in numerical weather prediction models and observations to better resolve the asymmetric structure in TCs.