Mesoscale and submesoscale turbulence in the Northwest Pacific Ocean revealed by numerical simulations

doi:10.1016/j.dsr2.2022.105221

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Mesoscale and submesoscale turbulence in the Northwest Pacific Ocean revealed by numerical simulations
	Wang, Shihong 3,4,5; Song, Zhenya 3,4,5; Ma, Weidong 1,2; Shu, Qi 3,4,5; Qiao, Fangli 3,4,5
刊名	DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
	2022-12-01
卷号	206 页码:10
ISSN号	0967-0645
DOI	10.1016/j.dsr2.2022.105221
通讯作者	Qiao, Fangli(qiaofl@fio.org.cn)
英文摘要	As the intermit between geostrophic-balanced mesoscale eddies and three-dimensional dissipation, submesoscale turbulence (1-50 km) plays a key role in the ocean energy cascade. Based on the output of 1/48 degrees MITgcm llc4320 simulation, mesoscale and submesoscale turbulence in the upper ocean and kinetic energy (KE) cascade between them are investigated in two different mesoscale dynamical regimes. When the timing of mesoscale seasonality varies with the mesoscale dynamical regimes, the timing of submesoscale seasonality is almost uniform. In this 1/48 degrees simulation, the inverse KE cascade, through which mesoscale KE is transferred from small scales to larger scales in altimeter observation, expands farther into the submesoscale range, with a minimum of about 15 km. The inversely transferred submesoscale KE is 1-2 orders of magnitude larger than that transferred forward. Both the inverse and forward KE cascades vary seasonally. While the amplitude of the forward KE cascade changes synchronously with the mixed layer depth, the amplitude of the inverse KE cascade lags behind them by similar to 1-month This is due to nonlinear interactions between submesoscale processes and more slowly evolving mesoscale eddies which takes a little longer than direct dissipation. The inverse KE cascade leads to the mesoscale seasonality in the Kuroshio Extension, which is invisible in conventional altimeter observation. In terms of depth dependency, both the eddy kinetic energy (EKE) and normalized vertical vorticity (xi/f) decrease rapidly with depth in the upper ocean, while the EKE-containing scale increases with depth and the xi-containing scale has a large core in the mixed layer. It indicates that the upper ocean is full of mesoscale eddies on a relatively small scale which are accompanied by active submesoscale turbulence. The submesoscale seasonality is still significant at 300-400 m, and shows vertically consistency in the whole upper ocean, so there may be downward development in the nonlinear evolution of submesoscale turbulence.
资助项目	National Natural Science Foundation of China[41806042] ; National Natural Science Foundation of China[41821004] ; National Natural Science Foundation of China[42276032] ; CAS Interdisciplinary Innovation Team[JCTD-2020-12]
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000901712400002
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181049]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Qiao, Fangli
作者单位	1.Univ Chinese Acad Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Shandong Key Lab Marine Sci & Numer Modeling, Qingdao, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China 5.Minist Nat Resources, Inst Oceanog 1, Key Lab Marine Sci & Numer Modeling, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shihong,Song, Zhenya,Ma, Weidong,et al. Mesoscale and submesoscale turbulence in the Northwest Pacific Ocean revealed by numerical simulations[J]. DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,2022,206:10.
APA	Wang, Shihong,Song, Zhenya,Ma, Weidong,Shu, Qi,&Qiao, Fangli.(2022).Mesoscale and submesoscale turbulence in the Northwest Pacific Ocean revealed by numerical simulations.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,206,10.
MLA	Wang, Shihong,et al."Mesoscale and submesoscale turbulence in the Northwest Pacific Ocean revealed by numerical simulations".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 206(2022):10.