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Commentaire de merthin

sur Le ras le bol des scientifiques : ils dénoncent le mensonge de l'urgence climatique


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merthin 3 octobre 2019 14:33

@doctorix

Figure 1 shows the measured CO2 concentrations plotted against depth, together with a simplified 180/160 ratio curve derived from the detailed curve given by Johnsen et a/.6 • The originally recovered Camp Century and Byrd Station cores are generally of poor quality between the 400 and 1,200 m depths and the ice is heavily fractured. In these depth intervals the measured CO2 values exhibit large scattering. This might be due to contamination by drilling fluid, a mixture of diesel fuel (88%) and trychlorethylene (12% ), penetrating through small cracks into the ice. In these fractured ice zones, we measured several samples at each sample depth. Its small size meant that the sample was probably uncontaminated and we conclude that the lowest CO2 values best represent the CO2 concentrations of the originally trapped air of these depth intervals. In the larger samples (300 g) contamination is almost inevitable and the measured CO2 concentrations tend to be higher than the air originally occluded in the ice. This is one reason for the high CO2 values obtained during the climatic optimum given by Berner et al. 1 for the Camp Century core.

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