Characteristics of subsurface mesoscale eddies in the northwestern tropical Pacific Ocean from an eddy-resolving model

doi:10.1007/s00343-020-9313-4

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

	Characteristics of subsurface mesoscale eddies in the northwestern tropical Pacific Ocean from an eddy-resolving model
	Xu Anqi 2,3,4; Yu Fei 1,2,3,4,5; Nan Feng 1,3,4,5; Ren Qiang 2,3,4
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2020-09-01
卷号	38 期号:5 页码:1421-1434
关键词	the northwestern tropical Pacific Ocean subsurface eddies composite structures heat transport energy source
ISSN号	2096-5508
DOI	10.1007/s00343-020-9313-4
通讯作者	Yu Fei(yuf@qdio.ac.cn)
英文摘要	Subsurface eddies (SSEs) are common features of the ocean interior. They are particularly abundant in oceanic basins and the vicinity of major intermediate water outflows. They are responsible for subsurface transport of mass, heat, and salt. Analysis of high-resolution general circulation model data has revealed the existence of subsurface anticyclonic eddies (SSAEs) and subsurface cyclonic eddies (SSCEs) in the northwestern tropical Pacific Ocean. SSEs are abundant east of the Philippines (0 degrees-22 degrees N, 120 degrees E-140 degrees E) and in latitude bands between 9 degrees N-17 degrees N east of 140 degrees E. The composite structure of SSEs was investigated. SSEs had a core at about 400-m water depth and their maximum meridional velocity exceeded 10 cm/s. They exhibited two cores with different salinity polarities in the surface and subsurface. Additionally, spatial distributions of heat transport induced by SSEs in the northwestern tropical Pacific were presented for the first time. A net equatorward heat flux toward a temperature up-gradient was observed. The analysis of eddy-mean flow interactions revealed that the circulation is baroclinically and barotropically unstable at different depths and to differing degrees. The energy conversions suggest that both barotropic and baroclinic instabilities are responsible for SSE generation east of the Philippines, whereas baroclinic instability caused by a horizontal density gradient and vertical eddy heat flux are important between 9 degrees N and 17 degrees N east of 140 degrees E. Meridional movement of the north equatorial current and the north equatorial undercurrent can contribute to SSE generation in our study region.
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000584398800007
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169090]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Yu Fei
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Xu Anqi,Yu Fei,Nan Feng,et al. Characteristics of subsurface mesoscale eddies in the northwestern tropical Pacific Ocean from an eddy-resolving model[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2020,38(5):1421-1434.
APA	Xu Anqi,Yu Fei,Nan Feng,&Ren Qiang.(2020).Characteristics of subsurface mesoscale eddies in the northwestern tropical Pacific Ocean from an eddy-resolving model.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,38(5),1421-1434.
MLA	Xu Anqi,et al."Characteristics of subsurface mesoscale eddies in the northwestern tropical Pacific Ocean from an eddy-resolving model".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 38.5(2020):1421-1434.