涡旋合并在维持准永久郁陵涡旋中的作用

IF 2.3 3区地球科学 Q2 OCEANOGRAPHY

Deep-Sea Research Part I-Oceanographic Research Papers Pub Date : 2025-06-09 DOI:10.1016/j.dsr.2025.104542

Guoqing Han , Wang Zhu , Yaofeng Wang , Xiayan Lin , Juncheng Xie , Yu Liu

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引用次数: 0

摘要

涡旋合并对维持准永久涡旋的寿命起着至关重要的作用。本研究利用卫星观测和三维再分析资料，研究了日本海郁陵盆地（UB）准永久涡旋郁陵涡旋的涡旋合并过程。结果表明：日本海的气旋涡旋数量大于反气旋涡旋数量；而长寿命涡旋（>；360天）多分布在UB，反气旋涡旋数量多于气旋涡旋数量。涡旋合并过程有利于郁陵涡旋的强化和准永久状态的维持。通过对三维再分析数据的实例分析，发现郁陵涡旋合并过程中存在相当大的不稳定性。在涡旋合并过程中，与斜压不稳定相关的能量转换占主导地位。其中，95.8%的涡旋合并过程表现出平均势能向涡旋势能的转化，而83.3%的涡旋合并过程表现出平均动能向涡旋动能的转化。郁陵涡旋的合并有利于郁陵涡旋的维护和发展。

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The role of eddy merging in maintaining the quasi-permanent Ulleung Eddy

Eddy merging plays a crucial role in maintaining the lifetimes of quasi-permanent eddies. This study used satellite observations and 3D reanalysis data to investigate the eddy merging process of a quasi-permanent eddy, known as the Ulleung Eddy, in the Ulleung Basin (UB) of the Sea of Japan. The results showed that the number of cyclonic eddies in the Sea of Japan was greater than that of anticyclonic eddies. However, regarding long-lived eddies (>360 days), which were mostly distributed in UB, the number of anticyclonic eddies was greater than that of cyclonic eddies. The eddy merging process is beneficial for strengthening the Ulleung Eddy and maintaining its quasi-permanent state. Through a case analysis of 3D reanalysis data, considerable instability was observed during the merging of the Ulleung Eddy. During the eddy merging process, energy conversion associated with baroclinic instability is dominant. In particular, 95.8 % of the eddy merging processes exhibited a conversion from mean potential energy to eddy potential energy, whereas 83.3 % of the eddy merging processes demonstrated a conversion from mean kinetic energy to eddy kinetic energy. The merging of the Ulleung Eddy is conducive to its maintenance and development.

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来源期刊

Deep-Sea Research Part I-Oceanographic Research Papers 地学-海洋学

CiteScore

4.60

自引率

4.20%

发文量

144

审稿时长

18.3 weeks

期刊介绍： Deep-Sea Research Part I: Oceanographic Research Papers is devoted to the publication of the results of original scientific research, including theoretical work of evident oceanographic applicability; and the solution of instrumental or methodological problems with evidence of successful use. The journal is distinguished by its interdisciplinary nature and its breadth, covering the geological, physical, chemical and biological aspects of the ocean and its boundaries with the sea floor and the atmosphere. In addition to regular "Research Papers" and "Instruments and Methods" papers, briefer communications may be published as "Notes". Supplemental matter, such as extensive data tables or graphs and multimedia content, may be published as electronic appendices.