Seasonal variations of eddy kinetic energy flux in the South Indian Countercurrent region

IOCAS-IR

	Seasonal variations of eddy kinetic energy flux in the South Indian Countercurrent region
	CHEN Zhongqian ; WANG Faming ; ZHENG Jian ; YANG Yuxing
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2020-09-15
出版年	2020
卷号	v.38 期号:05 页码:123-134
文献类型	CNKI期刊论文
摘要	The inverse cascade flux of kinetic energy(KE) and its length scale in the South Indian Countercurrent(SICC) region were investigated using 24-year satellite altimeter daily data from 1993–2016. The evolution of the eddy life cycle in the SICC was presented systemically. It was found that the arrest and inject scales of inverse cascade were within the baroclinic most unstable scale and observed energy-containing eddy scale. The seasonal cycle of the arrest scale, inject scale, and amplitude of the inverse cascade were compared with the eddy kinetic energy seasonal cycle, which revealed a 1.5-month lag of the eddy kinetic energy to the vertical shear of zonal velocity, implying the existence of nonlinear processes during the eddy growth phase. Meanwhile, the anisotropy of the inverse cascade indicated that kinetic energy might be transferred from meridional motions to zonal motions, which is probably caused by β effect. These results would be beneficial for a better understanding of the KE transfer processes in the SICC region.
关键词	mesoscale eddies spectral kinetic energy fl ux inverse cascade South Indian Countercurrent(SICC)
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;A010;
CNKI专题名称	气象学;海洋学;
分类号	P732
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the National Natural Science Foundation of China (Nos. 41776035 ; 41676007) ; the Funds for Creative Research Groups of China (No. 41421005)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/188012
专题	中国科学院海洋研究所
作者单位	1.KeyLaboratoryofOceanCirculationandWaves,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.FunctionLaboratoryforOceanDynamicsandClimate,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 4.CenterforOceanMega-Science,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	CHEN Zhongqian,WANG Faming,ZHENG Jian,et al. Seasonal variations of eddy kinetic energy flux in the South Indian Countercurrent region. 2020.