海洋天气的大气风能量

IF 15.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES
Shikhar Rai, J. Thomas Farrar, Hussein Aluie
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引用次数: 0

摘要

海洋天气包括垂直和紧张的中尺度运动,它们在海洋环流和气候系统中起着根本不同的作用。涡度决定了主要洋流和环流的运动。应变有助于锋生和水团的变形,推动了上层海洋的大部分混合和垂直运输。虽然最近的研究表明,与大气的相互作用使海洋的中尺度涡旋大小为0(100)公里,但风对张力运动的影响仍未被探索。在这里,我们推导了一个关于海洋涡度和应变的风功理论。利用卫星和模式数据,我们发现风在全球范围内以相同的速率阻尼应变和涡度,并揭示了基于它们的极性的惊人不对称性。副热带风使海洋气旋潮湿,并使强流区域外的反气旋活跃,而次极地风则起到相反的作用。在海洋应变中也出现了类似的模式,副热带辐合流沿西赤道向东极方向减弱,沿东赤道向西极方向增强。这些发现揭示了大气影响海洋天气的能量途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Atmospheric wind energization of ocean weather

Atmospheric wind energization of ocean weather

Ocean weather comprises vortical and straining mesoscale motions, which play fundamentally different roles in the ocean circulation and climate system. Vorticity determines the movement of major ocean currents and gyres. Strain contributes to frontogenesis and the deformation of water masses, driving much of the mixing and vertical transport in the upper ocean. While recent studies have shown that interactions with the atmosphere damp the ocean’s mesoscale vortices O(100) km in size, the effect of winds on straining motions remains unexplored. Here, we derive a theory for wind work on the ocean’s vorticity and strain. Using satellite and model data, we discover that wind damps strain and vorticity at an equal rate globally, and unveil striking asymmetries based on their polarity. Subtropical winds damp oceanic cyclones and energize anticyclones outside strong current regions, while subpolar winds have the opposite effect. A similar pattern emerges for oceanic strain, where subtropical convergent flow is damped along the west-equatorward east-poleward direction and energized along the east-equatorward west-poleward direction. These findings reveal energy pathways through which the atmosphere shapes ocean weather.

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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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