NGFS climate scenarios
Six different scenarios to assess transition and physical risks
To cover a broad range of physical and transition risks, the NGFS has designed 6 scenarios with the help of a group of renowned academic research institutions. These scenarios share similar socio-economic assumptions. They assume a continuation of current economic and population trends, though accounting for a COVID shock.
Net Zero 2050
Net Zero 2050 is an ambitious scenario that limits global warming to 1.5 °C through stringent climate policies and innovation, reaching net zero CO₂ emissions around 2050. Some jurisdictions such as the US, EU and Japan reach net zero for all greenhouse gases by this point.
This scenario assumes that ambitious climate policies are introduced immediately. CDR is used to accelerate the decarbonisation but kept to the minimum possible and broadly in line with sustainable levels of bioenergy production. Net CO₂ emissions reach zero around 2050, giving at least a 50 % chance of limiting global warming to below 1.5 °C by the end of the century, with no or low overshoot (< 0.1 °C) of 1.5 °C in earlier years. Physical risks are relatively low but transition risks are high.
Below 2 °C
This scenario assumes that climate policies are introduced immediately and become gradually more stringent though not as high as in Net Zero 2050. CDR is deployment is relatively low. Net-zero CO₂ emissions are achieved after 2070. Physical and transition risks are both relatively low.
This scenario assumes that climate policies are introduced immediately and become gradually more stringent though not as high as in Net Zero 2050. CDR is deployment is relatively low. Net-zero CO₂ emissions are achieved after 2070. Physical and transition risks are both relatively low.
Divergent Net Zero
Divergent Net Zero reaches net-zero by 2050 but with higher costs due to divergent policies introduced across sectors and a quicker phase out of fossil fuels.
This scenario differentiates itself from the Net Zero 2050 by assuming that climate policies are more stringent in the transportation and buildings sectors. This mimics a situation where the failure to coordinate policy stringency across sectors results in a high burden on consumers, while decarbonisation of energy supply and industry is less stringent. Furthermore, the availability of CDR technologies is assumed to be lower than in Net Zero 2050. Emissions are in line with a climate goal giving at least a 50 % chance of limiting global warming to below 1.5 °C by the end of the century, with no or low overshoot (<0.1 °C) of 1.5 °C in earlier years. This leads to considerably higher transition risks than Net Zero 2050 but overall the lowest physical risks of the 6 NGFS scenarios.
Delayed Transition
Delayed Transition assumes global annual emissions do not decrease until 2030. Strong policies are then needed to limit warming to below 2 °C. Negative emissions are limited.
This scenario assumes new climate policies are not introduced until 2030 and the level of action differs across countries and regions based on currently implemented policies, leading to a “fossil recovery” out of the economic crisis brought about by COVID-19. The availability of CDR technologies is assumed to be low pushing carbon prices higher than in Net Zero 2050. As a result, emissions exceed the carbon budget temporarily and decline more rapidly than in Well-below 2 °C after 2030 to ensure a 67 % chance of limiting global warming to below 2 °C. This leads to both higher transition and physical risks than the Net Zero 2050 and Below 2 °C scenarios.
Nationally Determined Contributions
This scenario assumes that the moderate and heterogeneous climate ambition reflected in the conditional NDCs at the begining of 2021 continues over the 21st century (low transition risks). Emissions decline but lead nonetheless to 2.6 °C of warming associated with moderate to severe physical risks. Transition risks are relatively low.
This scenario assumes that the moderate and heterogeneous climate ambition reflected in the conditional NDCs at the begining of 2021 continues over the 21st century (low transition risks). Emissions decline but lead nonetheless to 2.6 °C of warming associated with moderate to severe physical risks. Transition risks are relatively low.
Current Policies
Current Policies assumes that only currently implemented policies are preserved, leading to high physical risks.
Emissions grow until 2080 leading to about 3 °C of warming and severe physical risks. This includes irreversible changes like higher sea level rise. This scenario can help central banks and supervisors consider the long-term physical risks to the economy and financial system if we continue on our current path to a “hot house world”.