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Atmospheric CO2 residence time and the carbon cycle

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  • Starr, Chauncey

Abstract

An atmospheric CO2 residence time is determined from a carbon cycle which assumes that anthropogenic emissions only marginally disturb the preindustrial equilibrium dynamics of source/atmosphere/sink fluxes. This study explores the plausibility of this concept, which results in much shorter atmospheric residence times, 4–5 years, than the magnitude larger outcomes of the usual global carbon cycle models which are adjusted to fit the assumption that anthropogenic emissions are primarily the cause of the observed rise in atmospheric CO2. The continuum concept is consistent with the record of the seasonal photosynthesis swing of atmospheric CO2 which supports a residence time of about 5 years, as also does the bomb C14 decay history. The short residence time suggests that anthropogenic emissions contribute only a fraction of the observed atmospheric rise, and that other sources need be sought.

Suggested Citation

  • Starr, Chauncey, 1993. "Atmospheric CO2 residence time and the carbon cycle," Energy, Elsevier, vol. 18(12), pages 1297-1310.
    • Handle: RePEc:eee:energy:v:18:y:1993:i:12:p:1297-1310
    DOI: 10.1016/0360-5442(93)90017-8
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    Cited by:

    1. Ronan Connolly & Michael Connolly & Robert M. Carter & Willie Soon, 2020. "How Much Human-Caused Global Warming Should We Expect with Business-As-Usual (BAU) Climate Policies? A Semi-Empirical Assessment," Energies, MDPI, vol. 13(6), pages 1-51, March.
    2. Henry R. Linden, 1998. "Are the IPCC Carbon Emission and Carbon Dioxide Stabilization Scenarios Realistic?," Energy & Environment, , vol. 9(6), pages 647-657, September.

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