土星大气层全球气候建模,第五部分:大尺度涡旋

IF 2.5 2区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
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引用次数: 0

摘要

本文分析了气体巨行星大气中的大尺度涡旋,重点是利用土星-DYNAMICO 全球气候模式(GCM)进行的详细研究。大尺度涡旋是气态巨行星大气的一个显著特征,在其大气动力学中起着至关重要的作用。通过采用三种不同的方法--人工检测、通过人工神经网络(ANN)进行机器学习以及使用自动涡流检测算法(AMEDA)进行动态检测--我们描述了土星-DYNAMICO 全球气候模型中这些涡流的空间、时间和动态特性。我们的研究结果表明,由于涡流与平均流之间的相互作用得到了很好的解决,涡流的产生是一致的,其大小和强度分布与观测数据基本一致。然而,涡旋位置、大小和浓度方面的显著差异凸显了模型的局限性,并提出了有待进一步完善的领域。分析强调了带风条件在影响涡旋特征方面的重要性,并表明要对巨行星涡旋进行更精确的建模,可能需要改进对湿对流和喷流结构的表示。这项研究不仅使人们深入了解了全球大气环流模型模拟的土星大气动力学,还为比较行星大气观测数据和模型的涡旋特征提供了一个框架。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Global climate modelling of Saturn’s atmosphere, Part V: Large-scale vortices

This paper presents an analysis of large-scale vortices in the atmospheres of gas giants, focusing on a detailed study conducted using the Saturn-DYNAMICO global climate model (GCM). Large-scale vortices, a prominent feature of gas giant atmospheres, play a critical role in their atmospheric dynamics. By employing three distinct methods – manual detection, machine learning via artificial neural networks (ANN), and dynamical detection using the Automated Eddy-Detection Algorithm (AMEDA) – we characterise the spatial, temporal, and dynamical properties of these vortices within the Saturn-DYNAMICO GCM. Our findings reveal a consistent production of vortices due to well-resolved eddy-to-mean flow interactions, exhibiting size and intensity distributions broadly in agreement with observational data. However, notable differences in vortex location, size, and concentration highlight the model’s limitations and suggest areas for further refinement. The analysis underscores the importance of zonal wind conditions in influencing vortex characteristics and suggests that more accurate modelling of giant planet vortices may require improved representation of moist convection and jet structure. This study not only provides insights into the dynamics of Saturn’s atmosphere as simulated by the GCM but also offers a framework for comparing vortex characteristics across observations and models of planetary atmospheres.

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来源期刊
Icarus
Icarus 地学天文-天文与天体物理
CiteScore
6.30
自引率
18.80%
发文量
356
审稿时长
2-4 weeks
期刊介绍: Icarus is devoted to the publication of original contributions in the field of Solar System studies. Manuscripts reporting the results of new research - observational, experimental, or theoretical - concerning the astronomy, geology, meteorology, physics, chemistry, biology, and other scientific aspects of our Solar System or extrasolar systems are welcome. The journal generally does not publish papers devoted exclusively to the Sun, the Earth, celestial mechanics, meteoritics, or astrophysics. Icarus does not publish papers that provide "improved" versions of Bode''s law, or other numerical relations, without a sound physical basis. Icarus does not publish meeting announcements or general notices. Reviews, historical papers, and manuscripts describing spacecraft instrumentation may be considered, but only with prior approval of the editor. An entire issue of the journal is occasionally devoted to a single subject, usually arising from a conference on the same topic. The language of publication is English. American or British usage is accepted, but not a mixture of these.
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