South Korea

Critically Insufficient4°C+ World

NDCs with this rating fall well outside of a country’s “fair share” range and are not at all consistent with holding warming to below 2°C let alone with the Paris Agreement’s stronger 1.5°C limit. If all government NDCs were in this range, warming would exceed 4°C. For sectors, the rating indicates that the target is consistent with warming of greater than 4°C if all other sectors were to follow the same approach.

Highly insufficient< 4°C World

NDCs with this rating fall outside of a country’s “fair share” range and are not at all consistent with holding warming to below 2°C let alone with the Paris Agreement’s stronger 1.5°C limit. If all government NDCs were in this range, warming would reach between 3°C and 4°C. For sectors, the rating indicates that the target is consistent with warming between 3°C and 4°C if all other sectors were to follow the same approach.

Insufficient< 3°C World

NDCs with this rating are in the least stringent part of a country’s “fair share” range and not consistent with holding warming below 2°C let alone with the Paris Agreement’s stronger 1.5°C limit. If all government NDCs were in this range, warming would reach over 2°C and up to 3°C. For sectors, the rating indicates that the target is consistent with warming over 2°C and up to 3°C if all other sectors were to follow the same approach.

2°C Compatible< 2°C World

NDCs with this rating are consistent with the 2009 Copenhagen 2°C goal and therefore fall within a country’s “fair share” range, but are not fully consistent with the Paris Agreement long term temperature goal. If all government NDCs were in this range, warming could be held below, but not well below, 2°C and still be too high to be consistent with the Paris Agreement 1.5°C limit. For sectors, the rating indicates that the target is consistent with holding warming below, but not well below, 2°C if all other sectors were to follow the same approach.

1.5°C Paris Agreement Compatible< 1.5°C World

This rating indicates that a government’s NDCs in the most stringent part of its “fair share” range: it is consistent with the Paris Agreement’s 1.5°C limit. For sectors, the rating indicates that the target is consistent with the Paris Agreement’s 1.5°C limit.

Role model<< 1.5°C World

This rating indicates that a government’s NDC is more ambitious than what is considered a “fair” contribution: it is more than consistent with the Paris Agreement’s 1.5°C limit. No “role model” rating has been developed for the sectors.

1.5°C Compatible< 1.5°C World

Historical emissions

Historical emissions in South Korea were taken from the national inventories submitted to UNFCCC (UNFCCC, 2019). UNFCCC data are displayed in SAR GWPs and are updated in AR4 based on detailed data by gas. The 2030 NDC target was calculated based on the accompanying BAU scenario (Republic of Korea, 2015). The target is calculated excluding LULUCF emissions.

Pledge and post-2020 contribution

BAU projections for the 2020 pledge were taken from the Third National Communication (Republic of Korea, 2012) whilst the BAU for NDC is taken directly from the NDC pledge. We no longer consider the 2020 pledge when calculating the global temperature rise associated with the aggregated pledges of all countries. Both targets were defined in GWPs from SAR and therefore updated to AR4 in our assessment by harmonising given data with UNFCCC historical data.

Current policy projections

Current trend projections are based on the BAU scenario from the 7th Edition of APEC Energy Demand and Supply Outlook (APERC, 2019) and the US EPA non-CO₂ emission projections until 2030 (US EPA, 2019). Non-energy related CO₂ emissions are assumed to remain constant at the 2014 level. For the upper end of the range, we use the APERC BAU scenario directly. Under this scenario, the share of renewables in total electricity generation in 2030 reaches 7.6%. There are, however, other analyses that project higher renewable electricity shares (17% by Wood Mackenzie (Wood Mackenzie, 2019) and 14% by the Joint Research Centre of the European Commission (Keramidas et al., 2018)). Therefore, the upper bound emissions projections represent the electricity mix as projected by the Apec Outlook, while the lower bound emissions projections represent an adapted electricity mix in which renewable electricity share reaches 17% by 2030 by replacing coal-fired power generation. The average electricity CO₂ emission factors for fossil fuel-fired power generation displaced by renewables in 2030 per fuel type were assumed to be similar to the 2016 levels as reported by IEA (IEA, 2018).

To estimate the impact of the new “Plan for Electricity Supply and Demand”, the announced shares of generation per technology were firstly scaled up to cover the 1.2% of generation that was not allocated to a particular generating technology. These shares were then multiplied by the total generation under a BAU scenario in 2030 (APERC, 2019) decreased to 579.5 TWh to take into account the expected decrease in electricity demand (MOTIE, 2017). Total CO₂ emissions were then calculated using the electricity CO₂ emission factors used for the current policies scenario projections described above. The calculated emissions levels were similar to the lower bound projections of the current policies scenario.

Global Warming Potentials

The CAT uses Global Warming Potential (GWP) values from the IPCC’s Fourth Assessment Report (AR4) for all its figures and time series. Assessments completed prior to December 2018 (COP24) used GWP values from the Second Assessment Report (SAR).