Table 1 Main assumptions on climate policy implementation per scenario.

From: Taking stock of national climate policies to evaluate implementation of the Paris Agreement

Scenario

Policy assumptions

Until 2030

After 2030

No new policies

None

None

National policies

Implementation of current domestic policies

Equivalent effort to policy implementation before 2030

NDCs

Full implementation of conditional national NDCs

Equivalent effort to NDC implementation before 2030

2 °C/1.5 °C

Each country implements current implemented polices until 2020 and starts with cost-effective implementation to achieve the 2 °C/1.5 °C target between 2020 and 2030 with high (>66%) probability, thereby staying within a global carbon budget of 1000 GtCO2 and 400 GtCO2 in the 2011–2100 period

Continuation of cost-effective implementation to achieve the 2 °C/1.5 °C target