Hydraulics and Mixing of the Deep Overflow in the Lifamatola Passage of the Indonesian Seas

doi:10.1175/JPO-D-19-0326.1

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

	Hydraulics and Mixing of the Deep Overflow in the Lifamatola Passage of the Indonesian Seas
	Tan, Shuwen 1,4,5,6; Pratt, Larry J.3; Yuan, Dongliang 1,4,5,6; Li, Xiang 1,5,6; Wang, Zheng 1,5,6; Li, Yao 1,5,6; Corvianawatie, Corry 1,2,4,5,6; Surinati, Dewi 2; Budiman, Asep S.2; Bayhaqi, Ahmad 2
刊名	JOURNAL OF PHYSICAL OCEANOGRAPHY
	2020-09-01
卷号	50 期号:9 页码:2797-2814
ISSN号	0022-3670
DOI	10.1175/JPO-D-19-0326.1
通讯作者	Yuan, Dongliang(dyuan@qdio.ac.cn)
英文摘要	Hydrographic measurements recently acquired along the thalweg of the Lifamatola Passage combined with historical moored velocity measurements immediately downstream of the sill are used to study the hydraulics, transport, mixing, and entrainment in the dense overflow. The observations suggest that the mean overflow is nearly critical at the mooring site, suggesting that a weir formula may be appropriate for estimating the overflow transport. Our assessment suggests that the weir formulas corresponding to a rectangular, triangular, or parabolic cross section all result in transports very close to the observation, suggesting their potential usage in long-term monitoring of the overflow transport or parameterizing the transport in numerical models. Analyses also suggest that deep signals within the overflow layer are blocked by the shear flow from propagating upstream, whereas the shallow wave modes of the full-depth continuously stratified flow are able to propagate upstream from the Banda Sea into the Maluku Sea. Strong mixing is found immediately downstream of the sill crest, with Thorpe-scale-based estimates of the mean dissipation rate within the overflow up to 1.1 x 10(-7) W kg(-1) and the region-averaged diapycnal diffusivity within the downstream overflow in the range of 2.3 x 10(-3) to 10.1 x 10(-3) m(2) s(-1). Mixing in the Lifamatola Passage results in 0.6-1.2-Sv (1 Sv = 10(6) m(3) s(-1)) entrainment transport added to the overflow, enhancing the deep-water renewal in the Banda Sea. A bulk diffusivity coefficient estimated in the deep Banda Sea yields 1.6 x 10(-3) +/- 5 x 10(-4) m(2) s(-1), with an associated downward turbulent heat flux of 9 W m(-2).
资助项目	NSFC[91858204] ; NSFC[41720104008] ; NSFC[41421005] ; NSFC[41876025] ; CAS Strategic Priority Research Program[XDB42000000] ; QMSNL[2018SDKJ0104-02] ; Shandong Provincial projects[U1606402] ; U.S. NSF[OCE-1657870] ; Chinese Scholarship Council
WOS研究方向	Oceanography
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000608257600001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169944]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Yuan, Dongliang
作者单位	1.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 2.Indonesian Inst Sci, Res Ctr Oceanog, Jakarta, Indonesia 3.Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA USA 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 6.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Tan, Shuwen,Pratt, Larry J.,Yuan, Dongliang,et al. Hydraulics and Mixing of the Deep Overflow in the Lifamatola Passage of the Indonesian Seas[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2020,50(9):2797-2814.
APA	Tan, Shuwen.,Pratt, Larry J..,Yuan, Dongliang.,Li, Xiang.,Wang, Zheng.,...&Bayhaqi, Ahmad.(2020).Hydraulics and Mixing of the Deep Overflow in the Lifamatola Passage of the Indonesian Seas.JOURNAL OF PHYSICAL OCEANOGRAPHY,50(9),2797-2814.
MLA	Tan, Shuwen,et al."Hydraulics and Mixing of the Deep Overflow in the Lifamatola Passage of the Indonesian Seas".JOURNAL OF PHYSICAL OCEANOGRAPHY 50.9(2020):2797-2814.