The Ventilated Thermocline

Luyten, James R.; Pedlosky, Joseph; Stommel, Henry

doi:10.1175/1520-0485(1983)013<0292:tvt>2.0.co;2

Cited by 784 publications

(546 citation statements)

References 2 publications

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“…These observations conflict with the subduction hypothesis that the subduction is driven by coupled local cooling convection and Ekman pumping [Luyten et al, 1983;Huang, 1990]. …”

Section: Heat Advectionmentioning

confidence: 99%

Surface currents in the Canary Basin from drifter observations

Zhou¹,

Paduan²,

Niiler³

2000

J. Geophys. Res.

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“…These observations conflict with the subduction hypothesis that the subduction is driven by coupled local cooling convection and Ekman pumping [Luyten et al, 1983;Huang, 1990]. …”

Section: Heat Advectionmentioning

confidence: 99%

Surface currents in the Canary Basin from drifter observations

Zhou¹,

Paduan²,

Niiler³

2000

J. Geophys. Res.

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“…In the Sverdrup region, stretching and s offset one another; this same balance between layer thickness and the planetary vorticity tendency has been documented numerous times for mid-depth subtropical gyre flow in the North Atlantic (see, e.g., Luyten et al, 1983;or McDowell et al, 1982). In the jet region the primary balance is between stretching and relative vorticity, with a slight net increase in q going northward through the jet.…”

mentioning

confidence: 99%

Horizontal and vertical structure of velocity, potential vorticity and energy in the gulf stream

Hall¹

1985

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“…As expected, the concentrations of DIC, NO 3 , and PO 4 continuously increase from their outcrop regions toward the equator, showing an integrated signal of biological remineralization toward lower latitudes (Figure 7). Highest remineralization does not occur at the equator but along the eastern boundary of the Atlantic subtropical gyres as expected from the gyre ventilation theory [Luyten et al, 1983] and also from satellite-based estimates of primary and new production [Antoine et al, 1996;Laws et al, 2000].…”

Section: Mixing Triangle Approach (M2a)mentioning

confidence: 62%

Model‐based evaluation of methods to determine C:N and N:P regeneration ratios from dissolved nutrients

Schneider¹,

Karstensen²,

Oschlies³

et al. 2005

Global Biogeochemical Cycles

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[1] Four indirect methods to determine carbon and nutrient regeneration ratios in the ocean are applied to results from a physical-biogeochemical model with prescribed element ratios for organic matter (de-)composition. The aim is to test whether these methods are suitable to reproduce C org :N:P element ratios of organic matter remineralization, which in contrast to the real ocean are exactly known in the model framework. The model experiment is carried out using the classical C:N:P Redfield ratio of 106:16:1 for production and decomposition of organic material under preindustrial atmospheric pCO 2 . Two methods rely on predefined end member values, while the others do not. The first method is a simple linear regression of two parameters, neglecting mixing effects, and yields remineralization signals biased by isopycnal tracer gradients induced by contributions of different water masses. The second method is based on multiple linear regression of three parameters, includes mixing of three, but notprescribed end members. It can, in part, reproduce the prescribed remineralization ratios. However, considerable bias appears as a result of water mass mixing. The third method considers isopycnal mixing of three prescribed end member water masses by using temperature/salinity as conservative tracers on the two density surfaces s Q = 26.8 and s Q = 27.2. On the basis of a mixing triangle approach, the method is able to reproduce the regeneration rates best in the low latitudes, where the integrated signal of remineralization is high. The fourth method uses the full set of available parameters to derive mixing fractions and remineralization and is applied to the density range from s Q = 26.8 to s Q = 27.2, yielding the best reproduction of prescribed remineralization ratios. As expected, results from the last two methods are sensitive to the choice of end member concentrations. In general, best agreement between modeled and reconstructed ratios is found between 20°N and 20°S and deviations occur toward the outcrop regions, which we account to the low amount of remineralized material together with uncertainties in prescribed end member values. Our investigation shows how apparent variability of remineralization ratios can be generated through methodological shortcomings only.Citation: Schneider, B., J. Karstensen, A. Oschlies, and R. Schlitzer (2005), Model-based evaluation of methods to determine C:N and N:P regeneration ratios from dissolved nutrients, Global Biogeochem. Cycles, 19, GB2009,

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The Ventilated Thermocline

Cited by 784 publications

References 2 publications

Surface currents in the Canary Basin from drifter observations

Surface currents in the Canary Basin from drifter observations

Horizontal and vertical structure of velocity, potential vorticity and energy in the gulf stream

Model‐based evaluation of methods to determine C:N and N:P regeneration ratios from dissolved nutrients

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