The vortex splitting process from interaction between a mesoscale vortex and two islands

IF 1.9 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Dynamics of Atmospheres and Oceans Pub Date : 2024-11-03 DOI:10.1016/j.dynatmoce.2024.101506

Mingze Ji , Xiongbo Zheng , Fangli Qiao , Jingyi Lu , He Liu , Xiaole Li

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Abstract

Mesoscale vortices are major carriers of oceanic material and energy transfer, transporting large amounts of high-energy, temperature-anomalous water bodies during their movement. This significantly impacts both the ocean and the atmosphere. Based on the distribution of the North Brazil Curren rings and the Lesser Antilles in the eastern Caribbean Sea, we use the Regional Ocean Model System ocean circulation model to construct an idealized vortex. Simulations are conducted by varying the distances between the two islands and the scales of the islands to analyze how different parameters affect the vortex path and structural evolution. Using theoretical derivation and numerical simulation results, we construct a dimensionless parameter involving vortex diameter, island diameter, and the distance between the islands to determine the conditions under which vortex splitting occurs. The reliability of this dimensionless parameter is verified using experimental data and satellite data from St. Vincent and Barbados from April 6 to May 6, 2000.

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中尺度涡旋与两个岛屿相互作用产生的涡旋分裂过程

中尺度涡是海洋物质和能量转移的主要载体，在其运动过程中会输送大量高能量、温度反常的水体。这对海洋和大气都有重大影响。根据加勒比海东部北巴西库伦环和小安的列斯群岛的分布情况，我们利用区域海洋模式系统海洋环流模式构建了一个理想化的漩涡。通过改变两岛之间的距离和岛屿的尺度进行模拟，分析不同参数对涡旋路径和结构演变的影响。利用理论推导和数值模拟结果，我们构建了一个涉及涡旋直径、岛直径和岛间距离的无量纲参数，以确定涡旋分裂发生的条件。利用 2000 年 4 月 6 日至 5 月 6 日圣文森特和巴巴多斯的实验数据和卫星数据验证了这一无量纲参数的可靠性。

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来源期刊

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

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.