Decomposition Reports

The document explains the use of decomposition reports in LEAP to analyze trends in scenarios using the IPAT and Kaya identity frameworks. It details the configuration of these reports, the ability to decompose various indicators such as GHG emissions or air pollutants, and the available visualization options, including waterfall charts and time-series bar charts.

• LEAP decomposition reports utilize two primary methodologies: the IPAT expression, which relates human impact (I) to population (P), affluence (A), and technology (T), and the Kaya identity, which specifically expresses carbon dioxide emissions as a product of population, GDP per capita, energy intensity, and carbon intensity.
• Users can configure decomposition reports to analyze various ultimate impact indicators beyond greenhouse gases, such as air pollutant emissions like SO2 or PM2.5, or premature mortality related to health impacts when using the IBC module.
• Decomposition reports can compare changes in an ultimate indicator variable across two different time periods (a base year and an end year) within a single scenario, or compare two different scenarios (such as a baseline and a mitigation scenario) for a specific year.
• Results can be visualized through waterfall charts, which show the starting value, the incremental increase or decrease contributed by each factor, and the final value, or through time-series bar charts that show the contribution of each factor for each year.

APA

Stockholm Environment Institute (n.d.). Decomposition Reports. https://cdn.leap.sei.org/Help24/Views/Decomposition_Summary_Reports.htm

Chicago

Stockholm Environment Institute. Decomposition Reports. n.d. https://cdn.leap.sei.org/Help24/Views/Decomposition_Summary_Reports.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Decomposition Reports |url=https://cdn.leap.sei.org/Help24/Views/Decomposition_Summary_Reports.htm |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutenddecomposition, author = {{Stockholm Environment Institute}}, title = {{Decomposition Reports}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/Help24/Views/Decomposition_Summary_Reports.htm}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }