Tree Branches

The document describes the various branch types used in LEAP to organize data, including Key Assumption, Category, Technology, Fuel, Environmental Loading, and Indicator branches, detailing their specific roles in demand, transformation, and resource analysis.

• LEAP utilizes several specialized branch types to structure data: Key Assumption branches for independent time-series variables like GDP or population; Category branches for hierarchical organization of sectors and resources; and Technology branches to represent energy-consuming devices or conversion processes.
• Technology branches are further divided into three types based on the calculation method: Activity Level Technologies (activity level multiplied by annual energy intensity), Stock Technologies (turnover of energy-using devices), and Transport Technologies (turnover of vehicles).
• Specific branches handle fuel and environmental data: Fuel branches track output, primary resources, and secondary fuels, while Environmental Loading branches are used to specify pollutant emissions wherever fuel is combusted or in non-energy sectors.
• The software imposes structural restrictions on the tree, prohibiting the movement of branches between the four primary categories—Key Variables, Demand, Transformation, and Resources—and generally preventing the mixing of different branch icons at the same level.

APA

Stockholm Environment Institute (n.d.). Tree Branches. https://cdn.leap.sei.org/help24/Screen_Layout/Types_of_Tree_Branches.htm

Chicago

Stockholm Environment Institute. Tree Branches. n.d. https://cdn.leap.sei.org/help24/Screen_Layout/Types_of_Tree_Branches.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Tree Branches |url=https://cdn.leap.sei.org/help24/Screen_Layout/Types_of_Tree_Branches.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendtree, author = {{Stockholm Environment Institute}}, title = {{Tree Branches}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/help24/Screen_Layout/Types_of_Tree_Branches.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }