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Geographical distribution and anisotropy of the inverse kinetic energy cascade, and its role in the eddy equilibrium processes
Wang, Shihong1,2; Liu, Zhiliang1; Pang, Chongguang1
2015-07-01
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号120期号:7页码:4891-4906
文章类型Article
摘要The geographic character of the inverse cascade is analyzed based on the spectral kinetic energy flux calculated in the global ocean, using sea surface height (SSH) data from satellites, reanalysis data, and model outputs. It is shown that the strongest inverse cascade occurs mostly in high-energy eastward-flowing currents, such as the Antarctic Circumpolar Current (ACC), the Kuroshio Extension, and the Gulf Stream, which matches the global distribution pattern of the eddy kinetic energy (EKE). Hence, the eddy scales predicted by the local linear baroclinic instability L-bci and from the altimeter observation L-eddy are mapped out and compared with the energy injection scale L-inj and the arrest-start scale Larrest-start of the inverse cascade, respectively. Generally, Lbci agrees well with Linj in the midlatitude and high-latitude oceans, especially in the Northern Hemisphere. Leddy falls within the arrest ranges of the inverse cascade and is quite close to Larrest-start. Finally, the depth dependence and the anisotropy of the inverse kinetic energy cascade are also diagnosed in the global ocean. We have found that the strength of the inverse cascades decreases with increasing depth, but the global pattern of the strength is nearly invariable. Meanwhile, the variations in depth hardly affect the Linj and Larrest-start. After considering the anisotropy in the spectral flux calculation, a possible inertial range for the zonal spectral kinetic energy flux is expected, where the cascade magnitude will keep a nearly constant negative value associated with the oceanic zonal jets.
DOI10.1002/2014JC010476
收录类别SCI
语种英语
WOS记录号WOS:000359776000015
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/50107
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China
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Wang, Shihong,Liu, Zhiliang,Pang, Chongguang. Geographical distribution and anisotropy of the inverse kinetic energy cascade, and its role in the eddy equilibrium processes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2015,120(7):4891-4906.
APA Wang, Shihong,Liu, Zhiliang,&Pang, Chongguang.(2015).Geographical distribution and anisotropy of the inverse kinetic energy cascade, and its role in the eddy equilibrium processes.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,120(7),4891-4906.
MLA Wang, Shihong,et al."Geographical distribution and anisotropy of the inverse kinetic energy cascade, and its role in the eddy equilibrium processes".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 120.7(2015):4891-4906.
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