Absolute production of radiocarbon and the long-term trend of atmospheric radiocarbon

This paper presents simulations of the long-term trend of atmospheric radiocarbon, performed with the modified PANDORA model. The author shows that taking into account the outflow-supply carbon fluxes makes the decrease of (DC)-C-14 between 40 and 0 ka BP larger by 40-80parts per thousand, not much depending on which data (sedimentary magnetism, archaeomagnetism or Be-10) is used for the scenario of relative variations of C-14 production. This, together with the effect of CO2 increase reasonably reconciles model-simulated and observed decline of atmospheric Delta(14)C.