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 was obtained from the National Inventory Report 2017 and the December 2018 Quarterly Update (Department of the Environment and Energy 2019a, 2019b).
For the 2030 pledge, 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 of 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 Australia’s December emissions projections 2018 report (Department of the Environment and Energy, 2018). The CAT always provides current policy projections excluding LULUCF. To this end, we subtracted the projections provided for LULUCF.