SI4. Additional updates to DICE
In addition to the changes described above we made some additional minor changes. 1) We excluded the possibility to have negative CO2 emissions in both DICE 2016R2 and in our recalibrated version (in DICE 2016R2 negative CO2emissions are allowed beyond 2160). This was made in order to avoid that larger emissions during the 21st century can be compensated by negative emissions at later years in the model. This only has a minor impact on the results. 2) We also set damage estimates to zero in both DICE 29016R2 and our modified version since we are in this paper only interested in pathways for different stabilization targets and not in the damage estimates. This change has only a minor impact on CO2 emissions pathway towards stabilization at 2.5°C or less.