A new model for the role of the oceans in determining atmospheric PCO2

@article{Sarmiento1984ANM,
  title={A new model for the role of the oceans in determining atmospheric PCO2},
  author={Jorge L. Sarmiento and J. R. Toggweiler},
  journal={Nature},
  year={1984},
  volume={308},
  pages={621-624}
}
Recent ice-core measurements have revealed that the atmospheric CO2 level increased comparatively rapidly by about 70 p.p.m. at the end of the last ice age1. Here we present an ocean–atmosphere model in which changes in the productivity of high latitude surface waters (from which deep water is formed and circulated around the world's ocean) and/or in the thermo-haline overturning rate can lead to substantial changes in atmospheric partial pressure of carbon dioxide (PCO2), over a concentration… 

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References

SHOWING 1-9 OF 9 REFERENCES

Uptake of excess CO2 by an outcrop-diffusion model of the ocean

A carbon cycle model is presented in which direct ventilation of intermediate and deep ocean waters in high latitudes is taken into account. The 1½-dimensional ocean model is an extension of a

Ocean chemistry during glacial time

A Tritium Box Model of the North Atlantic Thermocline

Abstract A box model of 1972 tritium observations on isopycnal surface in the main thermocline of the North Atlantic subtropical gyre is used to estimate the time scales and volume of exchange of the

Tracers in the Sea

A book about chemical processes occurring in the ocean with emphasis on the cycles of carbon and other nutrients. In addition to a treatment of the present distribution of those constituents,

Sensitivity of a global climate model to an increase of CO2 concentration in the atmosphere

This study investigates the response of a global model of the climate to the quadrupling of the CO2 concentration in the atmosphere. The model consists of (1) a general circulation model of the

Ice core sample measurements give atmospheric CO2 content during the past 40,000 yr

Recent measurements1,2 on ice samples from Camp Century (Greenland, 77°10'N, 61°08'W), Byrd Station (Antarctica, 80°01'S, 110°31'W) and Dome C (74°40'S, 125°10'E) suggest that during the late part of

Climatological Atlas of the World Ocean

A project to objectively analyze historical ocean temperature, salinity, oxygen, and percent oxygen saturation data for the world ocean has recently been completed at the National Oceanic and

Deep Circulation of the North Atlantic over the Last 200,000 Years: Geochemical Evidence

TLDR
Data from a North Atlantic sediment core show that over the past 200,000 years there has been a continuous supply of nutrient-depleted waters into the deep North Atlantic, and indicates that the continental carbon inventory may have been less variable than previously suggested.