Diffusion-type model of the global carbon cycle for the estimation of dose to the world population from releases of carbon-14 to the atmosphere

Killough, G.G.

doi:10.2172/7260003

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…The vertical structure within each latitude zone is essentially described by Oeschger et al's (1975) box-diffusion model as modified by Killough (1977) and Butt and Viecelli (1980). These latter modifications include the use of model for computing mixed layer CO2 partial pressures and resulting atmosphere-ocean exchange coefficients, and the use of an energy balance climate model with ocean heat capacity for determining the temperatures used in the computation of the exchange coefficients.…”

Section: Description Of the Modelmentioning

confidence: 99%

A carbon cycle model with latitude dependence

1981

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A two-dimensional carbon cycle model is divided into three zones representing equatorial, middle and high latitude regions. The three zones are coupled together by a deep ocean meridional convective cell and atmospheric transport terms. The model is applied to the calculation of the dispersion of radiocarbon and tritium from nuclear weapons tests, to the calculation of the atmo spheric record of bomb radiocarbon and to the calculation of the Mauna Loa record of atmospheric CO2. Calibrating on the basis of the Northern hemisphere bomb test data yields a model which has approximately twice the CO2 ocean uptake of the one-dimension box diffusion models calibrated on the basis of deep water equilibrium carbon 14.

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Section: Description Of the Modelmentioning

confidence: 99%

A carbon cycle model with latitude dependence

1981

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“…The carbon cycle is essentially the box-diffusion model initially developed by Oeschger et al (1975) and modified by Killough (1977). It consists of an atmospheric carbon pool (or box), two biosphere boxes (for slow and rapid turnover) and an ocean whose carbon distribution is governed by a diffusion equation.…”

Section: Description Of the Modelmentioning

confidence: 99%

“…Others using Keeling's equations (e.g. Hoffert et al, 1978;Killough, 1977) have fixed ocean temperature at the present global average. The details of this computation and other aspects of the CO2 model are available in Burt (1978).…”

Section: Description Of the Modelmentioning

confidence: 99%

Magnitude of ocean temperature feedback effects in a coupled carbon-budget energy-balance model for the period 1800?2100

Burt

Viecelli

1980

Climatic Change

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The ocean-atmosphere CO: flux in an existing model is reformulated as a function of both surface temperature (SST) and carbon content. The CO 2 model is run in tandem with an energy balance model whose infrared flux to space is modulated by atmospheric CO2 concentration. Global (averaged over latitude and longitude) temperature values obtained from the tandem model are very similar to those produced by simple logarithmic scaling of CO~ concentrations. Simulations indicate the effect of SST feedback is slight, on both a seasonal and long-term basis. It is concluded that there is little advantage to running global CO~ models, as they are presently configured, in tandem with climate models.

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“…A detailed description ot the calculational models and sensiflvity analysis used in this evaluation is provided in a paper by Killough (1977), where it is demonstrated that the global dose conversion factor calculated in this manner is rather insensitive to the range of parameters which could be considered applicable to defining the transport of carbon through the ecosystem. In addition, the calculated value is consistent with values reported by other investigators using different calculational techniques.…”

Section: Wash-9460mentioning

confidence: 99%