Deep water circulation in the Luzon Strait

Zhao, Wei; Zhou, Chun; Tian, Jiwei; Yang, Qingxuan; Wang, Bin; Xie, Lingling; Qu, Tangdong

doi:10.1002/2013jc009587

Cited by 115 publications

(91 citation statements)

References 49 publications

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“…The mean transport in the each of the three layers varied greatly among different measurements, which ranged from 210 to 23.5, 5 to 0.22, and 22 to 20.22 Sv in the upper, middle, and deep layers (e.g., Tian et al 2006;Yuan et al 2008), respectively. Our deep inward transport of 20.9 is smaller than ;21.5 Sv derived from a short-term observation by Zhao et al (2014), who attributed the formation of the deep inflow to a baroclinic pressure gradient across Luzon Strait. The intrusive transport from Luzon Strait is balanced by the outward transports of ;3.2 Sv through Mindoro Strait and of ;2.3 Sv crossing the 100-m isobath (Figs.…”

Section: B Lateral Transports In the Scs Basincontrasting

confidence: 69%

A Three-Layer Alternating Spinning Circulation in the South China Sea

Gan

Liu

Hui

2016

Journal of Physical Oceanography

113

159

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Understanding of the three-dimensional circulation in the South China Sea (SCS) is crucial for determining the transports of water masses, energy, and biogeochemical substances in the regional and adjacent larger oceans. The circulation's kinematic and dynamic natures, however, are largely unclear. Results from a threedimensional numerical ocean circulation model and geostrophic currents, derived from hydrographic data, reveal the existence of a unique, three-layer, cyclonic-anticyclonic-cyclonic (CAC) circulation in the upper (,750 m), middle (750-1500 m), and deep (.1500 m) layers in the SCS with differing seasonality. An inflowoutflow-inflow structure in Luzon Strait largely induces the CAC circulation, which leads to vortex stretching in the SCS basin because of a lateral planetary vorticity flux in each of the respective layers. The formation of joint effects of baroclinicity and relief (JEBAR) is an intrinsic dynamic response to the CAC circulation. The JEBAR arises from the CAC flow-topography interaction in the SCS.

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Section: B Lateral Transports In the Scs Basincontrasting

confidence: 69%

A Three-Layer Alternating Spinning Circulation in the South China Sea

Gan

Liu

Hui

2016

Journal of Physical Oceanography

113

159

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“…A too weak deep-water overflow in the Luzon Strait can also explained this large bias. Zhao et al (2014) show that enhanced mixing in the SCS is a key process responsible for the density difference between the Pacific and SCS, which in turn drives the deep circulation in the Luzon Strait.…”

Section: Resultsmentioning

confidence: 97%

“…It could be due to the model resolution and to the accuracy of the topography in the Philippine Archipelago as suggested by Hurlburt et al (2011). In a recent study, Zhao et al (2014) argue that an increase of the diapycnal diffusivity in the deep SCS and the Luzon Strait enhances the transport of the deep circulation. A strong discrepancy exists between the few existing measurements and the INDO12 simulation in the Lifamatola Strait.…”

Section: Discussionmentioning

confidence: 92%

“…Hurlburt et al (2011) shows that simulations are very sensitive to model resolution and to the accuracy of the topography and sill depths within the narrow straits in the Philippine Archipelago. More recently, Zhao et al (2014) show that the transport of the deep circulation increases with diapycnal diffusivity in the deep SCS and Luzon Strait.…”

Section: Volume Transport (Itf and Scstf)mentioning

confidence: 99%

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Evaluation of an operational ocean model configuration at 1/12° spatial resolution for the Indonesian seas (NEMO2.3/INDO12) – Part 1: Ocean physics

et al. 2016

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Abstract. INDO12 is a 1/12 • regional version of the NEMO physical ocean model covering the whole Indonesian EEZ (Exclusive Economic Zone). It has been developed and is now running every week in the framework of the IN-DESO (Infrastructure Development of Space Oceanography) project implemented by the Indonesian Ministry of Marine Affairs and Fisheries.The initial hydrographic conditions as well as openboundary conditions are derived from the operational global ocean forecasting system at 1/4 • operated by Mercator Océan. Atmospheric forcing fields (3-hourly ECMWF (European Centre for Medium-Range Weather Forecast) analyses) are used to force the regional model. INDO12 is also forced by tidal currents and elevations, and by the inverse barometer effect. The turbulent mixing induced by internal tides is taken into account through a specific parameterisation. In this study we evaluate the model skill through comparisons with various data sets including outputs of the parent model, climatologies, in situ temperature and salinity measurements, and satellite data. The biogeochemical model results assessment is presented in a companion paper (Gutknecht et al., 2015).The simulated and altimeter-derived Eddy Kinetic Energy fields display similar patterns and confirm that tides are a dominant forcing in the area. The volume transport of the Indonesian throughflow (ITF) is in good agreement with the INSTANT estimates while the transport through Luzon Strait is, on average, westward but probably too weak. Compared to satellite data, surface salinity and temperature fields display marked biases in the South China Sea. Significant water mass transformation occurs along the main routes of the ITF and compares well with observations. Vertical mixing is able to modify the South and North Pacific subtropical water-salinity maximum as seen in T -S diagrams.In spite of a few weaknesses, INDO12 proves to be able to provide a very realistic simulation of the ocean circulation and water mass transformation through the Indonesian Archipelago. Work is ongoing to reduce or eliminate the remaining problems in the second INDO12 version.

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“…The Luzon Strait is the portal for the transfer of Kuroshio water to the SCS and water exchange through the Luzon Strait is well documented (Yang et al, 2010;Zhao et al, 2014;Qu et al, 2006). Fig.…”

Section: Toc Distribution Across the Luzon Straitmentioning

confidence: 99%