Table 1.
Scenarios of CO2 and SLCPs considered in the study
| Scenario acronyms | Decarbonization pathway toward carbon neutrality starting at? | SLCPs mitigation starting at? | CES included? |
| Baseline-default (RCP8.5) | No (SI Appendix, Fig. S1B) | No | No |
| Baseline-fast (RCP6.0-like) | No (SI Appendix, Fig. S1A) | No | No |
| Target-2C (CN2030 + SLCP2020) | 2030 (SI Appendix, Fig. S2A) | 2020 (SI Appendix, Fig. S4) | No |
| Target-1.5C (CN2020 + SLCP2020) | 2020 (SI Appendix, Fig. S2B) | 2020 (SI Appendix, Fig. S4) | No |
| Target-WB2C (CN2030 + SLCP2020 + CES1t) | 2030 (SI Appendix, Fig. S2A) | 2020 (SI Appendix, Fig. S4) | Yes (SI Appendix, Fig. S2C) |
| FixedConcentration2020 | 2020, but the reduction rate is slower than CN2020 (SI Appendix, Fig. S8A) | No | No |
| ZeroEmission2020 | 2020, but the CO2 emission is reduced to zero abruptly (SI Appendix, Fig. S8B) | No | No |
| CN2020 + SLCP2020-dependent | 2020 (SI Appendix, Fig. S2B) | 2020, but only includes the portion that is coemitted by CO2 sources (SI Appendix, Fig. S5) | No |