Case Study: Implementation of 10 wedges
The scenario chosen for this case study used 10 wedges to reduce carbon emissions. The value “10” was entered into the spreadsheet (see the (1) in the figure bbelow) and the required emissions for 2061 entered as an equation (2).
25.85 Gt C - 10 Gt C = 15.85 Gt C
As shown in the table below, with only 10 wedges, the carbon dioxide emissions are expected to double and the CO2 concentration (534 ppm) is well above the target of 350 ppm. The following graphs confirm that the climate mitigation goals (green lines) are not met with this mitigation strategy (red lines).
The projected global average temperature anomaly was evaluated by reviewing results compiled from the EdGCM global climate model. Based on these results, the temperature will continue to change nearly 4°C over the 21st century (relative to the 1980-1999 baseline). This would be in addition to the ~0.5°C change between the late 1800s and the late 20th century for a total of ~4.5°C temperature increase. This is clearly much greater than the suggested goal of 2°C.
The choice of mitigation wedges can be based on your expectations for feasible solutions, distribution of strategies between electricity, fuel, forests, etc., and total cost. The worksheet below shows an example of the information that should be entered into the worksheet for each wedge.
Example Wedge Worksheet listing