Overall Uncertainties of Global Carbon Cycle and Climate Models

Having analyzed the effect of some major uncertainties in the carbon cycle and climate in the preceding sections, we now compare their relative importance for projected temperature increase. In Figure 45.4, the central dark gray area depicts total uncertainty in the carbon cycle balancing exercise (compare with Figure 45.3(a), while the gray area reflects total uncertainty from climate modeling (compare with Figure 45.3(b)). Finally, the light gray area shows the resulting total range in outcomes using the overall uncertainties in the carbon cycle and climate. The extension of uncertainty on the upper side is worth noting;

Temperature increase (°C)

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