Barotropic and Baroclinic Inverse Kinetic Energy Cascade in the Antarctic Circumpolar Current

doi:10.1175/JPO-D-20-0053.1

IOCAS-IR

	Barotropic and Baroclinic Inverse Kinetic Energy Cascade in the Antarctic Circumpolar Current
	Xu YS(徐永生)
	2021
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	51 期号:3 页码:809-824
通讯作者	Xu, Yongsheng(yongsheng.xu@alumni.caltech.edu)
摘要	Stratifified geostrophic turbulence theory predicts an inverse energy cascade for the barotropic (BT) mode. Satellite altimetry has revealed a net inverse cascade in the baroclinic (BC) mode. Here the spatial variabilities of BT and BC kinetic energy flfluxes in the Antarctic Circumpolar Current (ACC) were investigated using ECCO2 data, which synthesize satellite data and in situ measurements with an eddy-permitting general circulation model containing realistic bathymetry and wind forcing. The BT and BC inverse kinetic energy cascades both reveal complex spatial variations that could not be explained fully by classical arguments. For example, the BC injection scales match better with most unstable scales than with the fifirst-mode deformation scales, but the opposite is true for the BT mode. In addition, the BT and BC arrest scales do not follow the Rhines scale well in terms of spatial variation, but show better consistency with their own energy-containing scales. The reverse cascade of the BT and BC modes was found related to their EKE, and better correlation was found between the BT inverse cascade and barotropization. Speculations of the fifindings were proposed; however, further observations and modeling experiments are needed to test these in terpretations. Spectral flflux anisotropy exhibits a feature associated with oceanic jets that is consistent with classical expectations. Specififically, the spectral flflux along the along-stream direction remains negative at scales up to that of the studied domain (;2000 km), while that in the perpendicular direction becomes positive close to the scale of the width of a typical jet.
关键词	Baroclinic flows Barotropic flows Antarctica Energy transport Fluxes Jets
DOI	10.1175/JPO-D-20-0053.1
收录类别	SCI
语种	英语
资助项目	National Key Research andDevelopment Program[2016YFC1401004] ; National Key Research andDevelopment Program[2019YFC1509102] ; National Natural Science Foundation of China[41421005] ; National Natural Science Foundation of China[41676168] ; National Natural Science Foundation of China[41376028] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[2018SDKJ0102-7] ; Open Fund of Key Laboratory ofOcean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences[2018HX020] ; NSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000646380100010
出版者	AMER METEOROLOGICAL SOC
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
版本	出版稿
条目标识符	http://ir.qdio.ac.cn/handle/337002/170558
专题	中国科学院海洋研究所
作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Xu YS. Barotropic and Baroclinic Inverse Kinetic Energy Cascade in the Antarctic Circumpolar Current[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2021,51(3):809-824.
APA	Xu YS.(2021).Barotropic and Baroclinic Inverse Kinetic Energy Cascade in the Antarctic Circumpolar Current.JOURNAL OF PHYSICAL OCEANOGRAPHY,51(3),809-824.
MLA	Xu YS."Barotropic and Baroclinic Inverse Kinetic Energy Cascade in the Antarctic Circumpolar Current".JOURNAL OF PHYSICAL OCEANOGRAPHY 51.3(2021):809-824.

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