Global Warming Potentials
The CAT uses Global Warming Potential (GWP) values from the IPCC’s Fourth Assessment Report (AR4) for all figures and time series. Assessments completed prior to December 2018 (COP24) used GWP values from the IPCC’s Second Assessment Report (SAR).
Historical emissions data were obtained from the 2018 CFR data to 2016 and harmonized with the historical data in the government’s 2018 projection report to 2018 (Australian Department of the Environment, 2018; Government of Australia, 2018).
For the 2030, we have estimated levels of emissions excl. LULUCF resulting from the NDC by subtracting projected emissions for the LULUCF sector in 2030 from the targeted level incl. LULUCF.
For a detailed description on the assumptions used regarding base year emissions, emissions data sources, LULUCF accounting rules used to calculate the Kyoto targets and 2020 pledge, please consult our Australia report.
Current policy projections
The current policy projection is based on the Australia’s December emissions projections 2018 report (Australian Department of the Environment, 2018). The CAT always provides current policy projections excluding LULUCF. To this end, we subtracted the projections provided for LULUCF.