Hydrography, chemistry, and radioisotopes in the Southeast Asian basins

Broecker, Wallace S.; Patzert, William C.; Toggweiler, J. R.; Stuiver, Minze

doi:10.1029/jc091ic12p14345

Cited by 123 publications

(73 citation statements)

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“…Moreover, there is only the Luzon Strait that connects the SCS below 2000 m. So the intruding Pacific Deep Water is the original water mass for the deep SCS. The existing observations show that the properties of the deep water mass in the SCS are similar to those in the deep western Philippine Sea [3,4], which supports that notion that the deep SCS water mass comes from the Pacific Deep Water via the Luzon Strait [5]. Since the Pacific Deep Water is colder and of higher density, it sinks after crossing the Luzon Strait.…”

supporting

confidence: 65%

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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confidence: 65%

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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“…On the other hand, the thermohaline circulation in the deep part of the SCS is characterized by a basin scale, western intensified cyclonic gyre, as evident in temperature, salinity, sediment and oxygen observations (Broecker et al 1986;Wang et al 2011). Because of the presence of many shallow areas and geometry of landsea distribution, tidal circulation and associated dissipation are strong within the SCS.…”

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confidence: 99%

The Effects of Thermohaline Circulation on Wind-Driven Circulation in the South China Sea

Wang

Huang

et al. 2012

Journal of Physical Oceanography

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The dynamic influence of thermohaline circulation on wind-driven circulation in the South China Sea (SCS) is studied using a simple reduced gravity model, in which the upwelling driven by mixing in the abyssal ocean is treated in terms of an upward pumping distributed at the base of the upper layer.Because of the strong upwelling of deep water, the cyclonic gyre in the northern SCS is weakened, but the anticyclonic gyre in the southern SCS is intensified in summer, while cyclonic gyres in both the southern and northern SCS are weakened in winter. For all seasons, the dynamic influence of thermohaline circulation on wind-driven circulation is larger in the northern SCS than in the southern SCS. Analysis suggests that the upwelling associated with the thermohaline circulation in the deep ocean plays a crucial role in regulating the wind-driven circulation in the upper ocean.

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“…During the INDOPAC expedition of 1976, two current meter moorings were installed for 28 days on Lifamatola Sill [Broecker et al, 1986] The possibility of instrument error in the deepest current meter was checked, and discounted, by comparing the tidal phase of the two deepest meters. Had there been a 180 ø compass error, for example, the M2 phase would have differed by nearly 180 ø.…”

Section: Introductionmentioning

confidence: 99%

Current measurements in the Maluku Sea

Luick¹,

Cresswell²

2001

J. Geophys. Res.

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Hydrography, chemistry, and radioisotopes in the Southeast Asian basins

Abstract: Nutrient constituent, radiocarbon, and radium data are presented for the waters in the Southeast Asian basins. These results suggest very rapid ventilation by waters passing over the sills that separate these basins from one another and from the open Pacific.

Cited by 123 publications

References 1 publication

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

The Effects of Thermohaline Circulation on Wind-Driven Circulation in the South China Sea

Current measurements in the Maluku Sea

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