Role of submesoscale processes in the isopycnal mixing associated with subthermocline eddies in the Philippine Sea

doi:10.1016/j.dsr2.2022.105148

IOCAS-IR > 海洋环流与波动重点实验室

	Role of submesoscale processes in the isopycnal mixing associated with subthermocline eddies in the Philippine Sea
	Wang, Qingye 1,2,3; Pang, Chongguang 1,2,3; Dong, Changming 4
	2022-08-01
发表期刊	DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
ISSN	0967-0645
卷号	202 页码:9
通讯作者	Wang, Qingye(wangqy@qdio.ac.cn)
摘要	Submesoscale processes are very typical in the ocean interior with a front formed by mesoscale eddies, and contribute to ocean mixing. However, the role of submesoscale processes in the isopycnal mixing associated with ocean eddies has never been explored from observations. Based on hourly velocity and temperature data from the mooring at 8.5??N, 130??E between 26 September 2015 and 22 December 2016, this study provides the horizontal eddy diffusivity using a mixing-length framework and a parameterization related to the Rhines scale, and estimates the contribution of submesoscale processes to isopycnal mixing for the first time. The subthermocline eddies in the Philippine Sea exist between 200 m and 800 m depth, have characteristic speeds of 0.1???0.5 m/s with a typical period of 40???100 days, and can cause the temperature fluctuation of -0.5 ??C. The horizontal diffusivity due to subthermocline eddies is about 4000???11,000 m2/s, and has a significant maximum near -400 m depth but the horizontal diffusivity associated with mixing length gradually increases below -700 m. The submesoscale processes can change the current velocity and temperature by -5 cm/s and -0.1 ??C, respectively. The submesoscale processes in the ocean interior can increase the isopycnal mixing associated with subthermocline eddies by about 6???7%. The profile of horizontal eddy diffusivity derived in this study is useful for parameterization of ocean eddies and submesoscale processes in the Philippine Sea in coarse-resolution ocean models.
关键词	Submesoscale process Isopycnal mixing Subthermocline eddies Philippine sea
DOI	10.1016/j.dsr2.2022.105148
收录类别	SCI
语种	英语
资助项目	National Key Research andDevelopment Program of China[2017YFA0604102] ; National Natural Science Foundation of China[41976011] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42010102]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000840332800003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/179932
专题	海洋环流与波动重点实验室
通讯作者	Wang, Qingye
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266237, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing 210044, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Wang, Qingye,Pang, Chongguang,Dong, Changming. Role of submesoscale processes in the isopycnal mixing associated with subthermocline eddies in the Philippine Sea[J]. DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,2022,202:9.
APA	Wang, Qingye,Pang, Chongguang,&Dong, Changming.(2022).Role of submesoscale processes in the isopycnal mixing associated with subthermocline eddies in the Philippine Sea.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,202,9.
MLA	Wang, Qingye,et al."Role of submesoscale processes in the isopycnal mixing associated with subthermocline eddies in the Philippine Sea".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 202(2022):9.