Cautionary tales from the mesoscale eddy transport tensor
Cautionary tales from the mesoscale eddy transport tensor
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DOI：
10.1016/j.ocemod.2023.102172
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发表时间：
2023-02
期刊：
影响因子：
3.2
通讯作者：
T. Uchida;D. Balwada;Q. Jamet;W. Dewar;B. Deremble;T. Penduff;J. Sommer
中科院分区：
文献类型：
--
作者：
T. Uchida;D. Balwada;Q. Jamet;W. Dewar;B. Deremble;T. Penduff;J. Sommer
诊断各向异性中尺度涡动输送张量使用被动示踪剂平流在线在一个理想的101个成员的中尺度分辨准地转（QG）的双环流系综，和一个现实的24个成员的涡动（1/1 2涡）集合的北大西洋。我们断言，沿系综维度，而不是空间或时间维度的分解沿着，使我们能够捕捉到的平均流量和涡流的内在时空变化。张量表现出良好的性能在重建被动示踪剂的涡动通量，这里定义为波动的集合厚度加权平均（TWA）的平均值。然而，张量无法重建涡通量QG位涡，其中封装的涡平均流相互作用，和其他活跃的示踪剂提出了一个问题：在何种程度上可以诊断张量被应用到通知参数化的中尺度动力学？
The anisotropic mesoscale eddy transport tensor is diagnosed using passive tracers advected online in both an idealized 101-member mesoscale-resolving quasi-geostrophic (QG) double-gyre ensemble, and a realistic 24-member eddying (1/1 2∘) ensemble of the North Atlantic. We assert that the Reynold’s decomposition along the ensemble dimension, rather than the spatial or temporal dimension, allows us to capture the intrinsic spatiotemporal variability of the mean flow and eddies. The tensor exhibits good performance in reconstructing the eddy fluxes of passive tracers, here defined as fluctuations about the ensemble thickness-weighted averaged (TWA) mean. However, the inability of the tensor to reconstruct eddy fluxes of QG potential vorticity, which encapsulates the eddy-mean flow interaction, and other active tracers raises the question: To what extent can the diagnosed tensor be applied to inform the parametrization of mesoscale dynamics?