Propagation Features of Diurnal Internal Tides West of the Luzon Strait Revealed by a Large PIES Array

doi:10.1175/JPO-D-22-0206.1

IOCAS-IR > 海洋环流与波动重点实验室

	Propagation Features of Diurnal Internal Tides West of the Luzon Strait Revealed by a Large PIES Array
	Wang, Min 1,2; Zhu, Xiao-Hua 1,2,3; Zheng, Hua 1,2; Chen, Juntian 2; Zhao, Ruixiang 2; Liu, Zhao-Jun 2; Ren, Qiang4,5 ; Liu, Yansong 4,5,6; Nan, Feng 4,5,6; Yu, Fei 4,5,6,7; Wang, Jianfeng 4,5,6; Li, Qiang 8
	2023-12-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	53 期号:12 页码:2823-2846
通讯作者	Zhu, Xiao-Hua(xhzhu@sio.org.cn)
摘要	Energetic internal tides (ITs) are generated from the Luzon Strait (LS) and propagate westward into the South China Sea (SCS). Owing to the lack of large-scale synchronous measurements, the propagation features and seasonal variations of diurnal ITs remain unclear. From 2018 to 2019, mode-1 diurnal ITs west of the LS were continuously observed using a large-scale moored array of 27 pressure-recording inverted echo sounders (PIESs) and a thermistor chain. Measurements confirmed that diurnal ITs radiate from the LS with a north-south asymmetrical pattern, with the most energetic channel located in the middle and south of the LS. The total energy radiated into the SCS across 1208E is 2.67 GW for the K1 ITs and 1.54 GW for the O1 ITs, approximately 2 times larger than those inferred from satellite observations. K1 dominates among the diurnal ITs, with its maximum isopycnal displacement (amplitude) and energy input to the SCS being the strongest in summer (i.e., 16.3 m and 2.81 GW, respectively). The propagation speed of K1 is higher in summer and autumn along the main channel (i.e., 4.33and 4.36 m s21, respectively). Seasonal stratification and circulation play important roles in the seasonal variation of amplitude and propagation speed of the K1 ITs. The seasonal variability of diurnal-band ITs, which includes all diurnal constituents, is location-dependent and primarily results from the superposition of the K1 and P1 ITs. In particular, vertical displacement is strong in summer and winter along the main channel of the K1 and P1 ITs. The seasonal amplitude of K1 can modulate this seasonal feature.SIGNIFICANCE STATEMENT: Internal tides (ITs) are internal waves at tidal frequencies. The Luzon Strait (LS) is one of the most energetic sites to generate large-amplitude ITs. The ITs propagate into the South China Sea (SCS), interact with mesoscale eddies, large-scale circulations, etc., and influence local hydrodynamics as well as ecosystem and sediment transport. This motivated an observation plan to investigate the ITs at the western entrance of the LS. From June 2018 to August 2019, an array of 28 PIESs was deployed in the northeastern SCS, almost covering the western entrance of the LS, to investigate the propagation properties of ITs including their amplitude, phase speed, wavelength, propagation direction, and energy fluxes and their annual and seasonal variations. Here, we primarily focus on the mode-1 diurnal ITs. The new insights enrich our understanding of IT dynamics and seasonal variations and support further improvements in numerical simulations.
关键词	Ocean Internal waves In situ oceanic observations Seasonal variability
DOI	10.1175/JPO-D-22-0206.1
收录类别	SCI
语种	英语
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001122243000002
出版者	AMER METEOROLOGICAL SOC
WOS关键词	SOUTH CHINA SEA ; TOPOGRAPHIC ROSSBY WAVES ; LONG-RANGE PROPAGATION ; SEASONAL VARIABILITY ; BAROCLINIC TIDES ; ABYSSAL CURRENT ; INERTIAL WAVES ; DEEP BASIN ; GENERATION ; ATLANTIC
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184213
专题	海洋环流与波动重点实验室
通讯作者	Zhu, Xiao-Hua
作者单位	1.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China 2.Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou, Peoples R China 3.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 6.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 7.Univ Chinese Acad Sci, Beijing, Peoples R China 8.Tsinghua Univ, Grad Sch Shenzhen, Shenzhen, Peoples R China
推荐引用方式 GB/T 7714	Wang, Min,Zhu, Xiao-Hua,Zheng, Hua,et al. Propagation Features of Diurnal Internal Tides West of the Luzon Strait Revealed by a Large PIES Array[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2023,53(12):2823-2846.
APA	Wang, Min.,Zhu, Xiao-Hua.,Zheng, Hua.,Chen, Juntian.,Zhao, Ruixiang.,...&Li, Qiang.(2023).Propagation Features of Diurnal Internal Tides West of the Luzon Strait Revealed by a Large PIES Array.JOURNAL OF PHYSICAL OCEANOGRAPHY,53(12),2823-2846.
MLA	Wang, Min,et al."Propagation Features of Diurnal Internal Tides West of the Luzon Strait Revealed by a Large PIES Array".JOURNAL OF PHYSICAL OCEANOGRAPHY 53.12(2023):2823-2846.

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