Letter to the Editor: Carbon dioxide emissions and concentrations regression revisited
by B.C. Cohen, W.C. Labys
International Journal of Global Energy Issues (IJGEI), Vol. 6, No. 6, 1994

Abstract: In this journal, the results of exercises which attempt to estimate econometrically the relationship between CO₂ concentrations and emissions were presented. In this extension, an explicit role is allowed for a slow upward drift of concentrations as evidenced by the record from ice cores for the period just before the industrial revolution. This is done by restricting the intercept term of the fitted regression. This procedure allows for, additionally, an independent estimate of 'seepage', the annual proportion of the existing atmospheric carbon stock absorbed by the earth, rather than imposing an assumed value as in the prior efforts. Also, revised data from IPCC for anthropogenic carbon emissions for 1850-1990 and more recent revised data for CO₂ concentrations for 1959-1990 are used to refit the regression to the 1860-1988 period (as in the previous effort) and extend the estimation period to 1850-1990.

Online publication date: Wed, 16-Jul-2014

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