Images from the Book
These are the images from this chapter of Environment: An Interdisciplinary Anthology
Figure 14.4 |
Figure 14.5 |
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| Figure 14.4: The top curve is a representative BAU emissions path for global carbon emissions as CO2 from fossil fuel combustion and cement manufacture: 1.5% per year growth starting from 7.0 GtC/year in 2004. The bottom curve is a CO2 emissions path consistent with atmospheric CO2 stabilization at 500 ppm by 2125. [See also SOM text.] The bottom curve assumes an ocean uptake calculated with the High-Latitude Exchange Interior Diffusion Advection (HILDA) ocean model and a constant net land uptake of 0.5 GtC/year. The area between the two curves represents the avoided carbon emissions required for stabilization. | Figure 14.5: Idealization of Figure 14.4: A stabilization triangle of avoided emissions (gray) and allowed emissions (black). The allowed emissions are fixed at 7 GtC/year beginning in 2004. The stabilization triangle is divded into seven wedges, each of which reaches I GtC/year in 2054. With linear growth, the total avoided emissions per wedge is 25 GtC, and the total area of the stabilization triangle is 175 GtC. The arrow at the bottom right of the stabilization triangle points downward to emphasize that fossil fuel emissions must decline substantially below 7 GtC/year after 2054 to achieve stabilization at 500 ppm. |