Observation of Luzon Strait transport

Tian, Jiwei; Yang, Qingxuan; Liang, Xinfeng; Xie, Lingling; Hu, Dunxin; Wang, Fan; Qu, Tangdong

doi:10.1029/2006gl026272

Cited by 266 publications

(215 citation statements)

References 13 publications

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“…The Luzon Strait deep overflow is maximum in winter and minimal in spring. The unassimilated OCCAM and all four assimilated datasets show that the net transport of Luzon Strait deep overflow is westward in July and October, which is consistent with the results of Tian et al [12] and Yang et al [14]. From the above analysis, we conclude that these models' ability to simulate the Luzon Strait deep overflow needs improvement.…”

Section: Luzon Strait Deep Overflowsupporting

confidence: 80%

“…As shown in Table 2, estimates of the net Luzon Strait transport are consistent with previous studies [16]. The transport of Luzon deep overflow is about 0.5 Sv except for JPL-R, obviously weaker compared with estimates of Tian et al [12] and Yang et al [14]. The multi-model mean of the Luzon Strait deep overflow is 0.36 Sv, and the corresponding multi-model mean of standard deviation is 0.22 Sv.…”

Section: Luzon Strait Deep Overflowsupporting

confidence: 78%

“…Some other results of this study include (1) a residence time of less than 30 years in the deep SCS, (2) a mean diapycnal diffusivity as large as 10 3 m 2 s 1 , and (3) an abyssal upwelling rate of about 310 6 ms 1 . Tian et al [12] confirmed that the Luzon Strait transport has a sandwiched vertical structure. The net westward volume transport (into the SCS) in the deep (>1500 m) layer of the Luzon Strait reaches 2 Sv.…”

Section: Luzon Strait Deep Overflowsupporting

confidence: 51%

“…So, the Luzon Strait deep overflow forces the SCS deep circulation. Based on hydrological data, the transport of the Luzon Strait deep overflow is from 1 to 3 Sv [6][7][8][9][10][11][12][13][14][15][16]. Moreover, reflection seismic profiles show that drift sediments occur in the depth range of 1200-2800 m on the continental margin off Southeast China.…”

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confidence: 99%

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Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs

et al. 2013

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This study is a preliminary analysis of the South China Sea (SCS) deep circulations using eight quasi-global high-resolution ocean model outputs. The goal is to assess models' ability to simulate these deep circulations. The analysis reveals that models' deep temperatures are colder than the observations in the World Ocean Atlas, while most models' deep salinity values are higher than the observations, indicating models' deep water is generally colder and saltier than the reality. Moreover, there are long-term trends in both temperature and salinity simulations. The Luzon Strait transport below 1500 m is 0.36 Sv when averaged for all models, smaller compared with the observation, which is about 2.5 Sv. Four assimilated models and one unassimilated (OCCAM) display that the Luzon deep-layer overflow reaches its minimum in spring and its maximum in winter. The vertically integrated streamfunctions below 2400 m from these models show a deep cyclonic circulation in the SCS on a large scale, but the pattern is different from the diagnostic streamfunction from the U.S Navy Generalized Digital Environment Model (GDEM-Version 3.0, GDEMv3). The meridional overturning structure above 1000 m is similar in all models, but the spatial distribution and intensity below 1500 m are quite different from model to model. Moreover, the meridional overturning below 2400 m in these models is weaker than that of the GDEMv3, which indicates a deep vertical mixing process in these models is biased weak. Based on the above evaluation, this paper discusses the impacts of T/S initial value, topography, and mixing scheme on the SCS deep circulations, which may provide a reference for future model improvement. quasi-global ocean model, deep-layer and bottom SCS circulations, model evaluation Citation:Xie Q, Xiao J G, Wang D X, et al. Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs.

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Section: Luzon Strait Deep Overflowsupporting

confidence: 80%

Section: Luzon Strait Deep Overflowsupporting

confidence: 78%

Section: Luzon Strait Deep Overflowsupporting

confidence: 51%

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confidence: 99%

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Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs

et al. 2013

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“…The incoming Pacific water enters the SCS through the Bashi Strait over the 2600 m deep sill, and the deep water overflow gradually gets mixed with ambient and then returns back to the Pacific in intermediate layers [89]. Consequently, the SCS deep waters below 2000 m are uniform and stable in terms of density and dissolved oxygen [90].…”

Section: Evolution Of Deep-water Circulation In Sediment Recordmentioning

confidence: 99%

Tracing the life history of a marginal sea—On “The South China Sea Deep” Research Program

Wang

2012

Chin. Sci. Bull.

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the first large-scale basic-research program in ocean science in the country aiming to reconstruct the life history of a marginal sea. The overall scientific objective of the program is to dissect this typical marginal sea by studying its history of evolution and its modern processes, including the following three major components: (1) Development of the deep basin: utilizing new techniques to re-measure magnetic anomaly lineations, to explore the deep tectonic features, to drill the oceanic crust, and to study volcanic seamount chains; (2) deep-water sediments: observing the modern processes to reveal the patterns of deep-water circulations and sedimentation, analyzing deep-sea sediments to recognize paleoceanographic response to basin evolution, and subsequently to bridge the modern and paleo-studies of the deep-sea processes; and (3) biogeochemical processes: using a variety of techniques including deploying submarine observation and deep-water diving device to investigate the distribution patterns and environmental impacts of deepwater seepages and subbottom circulation, and to reveal the role of microbes in deep-sea carbon cycling. As compared with the open ocean and other marginal seas, the South China Sea enjoys many more advantages as a marine basin for reconstructing the life history. Meanwhile, the South China Sea Deep Program provides unique opportunities in studying the evolution and variations of the sea-land interactions between the Pacific and Asia.the South China Sea Deep, marginal sea, deep-sea process, life history, tectonic evolution, sedimentological response, biogeochemistry Citation:Wang P X. Tracing the life history of a marginal

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On the dynamics of the seasonal variation in the South China Sea throughflow transport

Yang

Lin

2013

JGR Oceans

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[1] The Luzon Strait transport (LST) of water mass from the Pacific Ocean to the South China Sea (SCS) varies significantly with seasons. The mechanisms for this large variability are still not well understood. The steady-state island rule, which is derived from a steadystate model, is not applicable to seasonal time scale variations in a large basin like the Pacific Ocean. In this paper, we will use a theoretical model that is based on the circulation integral around the Philippines. The model relates the LST variability to changes in the boundary currents along the east coast of the Philippines, including the North Equatorial Current (NEC) Bifurcation Latitude (NECBL), the transports of Kuroshio and Mindanao Currents (KC and MC), and to the local wind-stress forcing. Our result shows that a northward shift of the NECBL, a weakening of the KC or a strengthening of the MC would enhance the LST into the SCS. This relationship between the LST and the NEC-KC-MC is consistent with observations. The analytical result is tested by a set of idealized numerical simulations.

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Observation of Luzon Strait transport

Cited by 266 publications

References 13 publications

Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs

Analysis of deep-layer and bottom circulations in the South China Sea based on eight quasi-global ocean model outputs

Tracing the life history of a marginal sea—On “The South China Sea Deep” Research Program

On the dynamics of the seasonal variation in the South China Sea throughflow transport

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