The ubiquitous zonal jets in the atmospheres of giant planets and Earth's oceans
The ubiquitous zonal jets in the atmospheres of giant planets and Earth's oceans
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DOI：
10.1029/2004gl019691
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发表时间：
2004-07-01
影响因子：
5.2
通讯作者：
Sukoriansky, S
中科院分区：
文献类型：
--
作者：
Galperin, B;Nakano, H;Sukoriansky, S
最近对北太平洋进行的允许涡旋的模拟揭示了多个纬向喷流的强大模式，这些模式在视觉上与巨行星上的纬向喷流相似。我们认为，这种相似性不仅仅是视觉上的，因为海洋喷流的能谱遵循一个幂律，与外行星上的纬向流的能谱相吻合。值得注意的是，即使是非量纲比例系数C-Z，由该谱律下的数据决定，似乎在所有情况下都是恒定的，大约等于0.5。这些结果表明，海洋和巨行星大气中的多重喷流具有相同的各向异性逆能量级联动力学特征，即能量从各向同性小尺度涡旋流向各向异性大尺度结构，并具有独特的各向异性谱。讨论了这些结果对气候研究和未来观测任务设计的意义。
Recent eddy-permitting simulations of the North Pacific Ocean have revealed robust patterns of multiple zonal jets that visually resemble the zonal jets on giant planets. We argue that this resemblance is more than just visual because the energy spectrum of the oceanic jets obeys a power law that fits spectra of zonal flows on the outer planets. Remarkably, even the non-dimensional proportionality coefficient, C-Z, determined by data under that spectral law, appears to be constant for all cases and approximately equal to 0.5. These results indicate that the multiple jet sets in the ocean and in the atmospheres of giant planets are governed by the same dynamics characterized by an anisotropic inverse energy cascade, i.e., the flow of energy from isotropic small-scale eddies to anisotropic large-scales structures, as well as the unique anisotropic spectrum. Implications of these results for climate research and future designs of observational missions are discussed.