元海洋响应对热带气旋加强的作用:陶克泰气旋和雅斯气旋的比较分析

IF 1.9 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Amit Kumar Jena , Manasa Ranjan Behera , Sachiko Mohanty , Srineash VK
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引用次数: 0

摘要

本研究利用多平台数据集调查了热带气旋陶克泰(Tauktae)(5 月 14-19 日)和雅斯(Yaas)(5 月 23-28 日)分别在阿拉伯海东部和孟加拉湾西部发生期间表层气象海洋变量的物理响应。这项研究综合了对热带气旋、海洋热浪(MHWs)和垂直风切变之间复杂相互作用的科学认识,并侧重于它们对海洋动力学的综合影响。热带气旋陶克泰(Tauktae)在没有遇到任何海洋热浪的情况下发展并迅速增强,需要较长的生命周期(∼3 天)才能达到极严重气旋风暴(ESCS)的峰值。相反,持续时间长达五倍(26 天)的 MHW 事件对 TC Yaas 在较短时间(∼1.5 天)内增强为极严重气旋风暴(VSCS)有显著影响。热带气旋雅斯的增强是由于垂直风切变从阿拉伯海输送热量和水汽,为其生长和发展创造了有利环境。此外,雅斯之前的低垂直风切变为 MHW 事件的持续提供了有利条件。沿路径出现的反气旋涡旋对热带气旋陶克泰和雅斯的加强起了关键作用。与TC Tauktae不同的是,在TC Yaas登陆之前,短波辐射的增加和长波辐射的减少对MHW事件的持续起了重要作用。在雅斯风暴登陆后,阻挡层厚度和混合层热含量仍然较高,而陶克泰风暴的阻挡层厚度和混合层热含量较低。这表明,相对于陶克泰,TC Yaas 的平移速度较高,导致海洋内的搅动效应减弱,使大量热量保留在混合层内。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Role of met-oceanic response to the intensification of tropical cyclones: A comparative analysis on cyclone Tauktae and Yaas
The present study investigates the physical response of surface met-ocean variables during the tropical cyclones (TCs) Tauktae (14–19 May) and Yaas (23–28 May) along the eastern Arabian Sea and western Bay of Bengal respectively using multi-platform datasets. This study synthesizes scientific understanding of the complex interplay between TCs, Marine heat waves (MHWs), and vertical wind shear; and focuses on their combined effects on ocean dynamics. The TC Tauktae developed and rapidly intensified without encountering any MHW event and required longer lifespan (∼3 days) to reach its peak as an Extremely Severe Cyclonic Storm (ESCS). Conversely, prolonged MHW event, persisting for five-fold duration (26 days), significantly influenced the intensification of TC Yaas into a Very Severe Cyclonic Storm (VSCS) within a shorter duration (∼1.5 days). TC Yaas intensified due to vertical wind shear, which transported heat and moisture from the Arabian Sea, creating favorable environment for its growth and development. Furthermore, the low vertical wind shear preceding Yaas provides favorable conditions for the persistence of MHW events. The presence of an anticyclonic eddy along the track played a crucial role in the intensification of TC Tauktae and Yaas. Before TC Yaas, elevated shortwave radiation and reduced longwave radiation played a significant role in sustaining the MHW event, unlike TC Tauktae. After the landfall of TC Yaas, the barrier layer thickness and mixed layer heat content were still high, whereas these were low in case of Tauktae. This signifies that higher translational speed of TC Yaas, relative to Tauktae, leads to reduced churning effects within the ocean, allowing for the retention of a substantial amount of heat within the mixed layer.
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来源期刊
Dynamics of Atmospheres and Oceans
Dynamics of Atmospheres and Oceans 地学-地球化学与地球物理
CiteScore
3.10
自引率
5.90%
发文量
43
审稿时长
>12 weeks
期刊介绍: Dynamics of Atmospheres and Oceans is an international journal for research related to the dynamical and physical processes governing atmospheres, oceans and climate. Authors are invited to submit articles, short contributions or scholarly reviews in the following areas: •Dynamic meteorology •Physical oceanography •Geophysical fluid dynamics •Climate variability and climate change •Atmosphere-ocean-biosphere-cryosphere interactions •Prediction and predictability •Scale interactions Papers of theoretical, computational, experimental and observational investigations are invited, particularly those that explore the fundamental nature - or bring together the interdisciplinary and multidisciplinary aspects - of dynamical and physical processes at all scales. Papers that explore air-sea interactions and the coupling between atmospheres, oceans, and other components of the climate system are particularly welcome.
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