The Tree

The document describes the 'tree' in LEAP as a hierarchical outline used across Analysis, Results, and Notes views to organize data structures. It details the primary top-level branches—including Demand, Transformation, Resources, and Non-Energy Sector Effects—and explains tools for navigating the model, such as filtering and bookmarks.

• The LEAP tree is a hierarchical outline used to organize and edit main data structures across the Analysis, Results, and Notes views, allowing users to select data for editing or access calculated results for specific branches.
• Data in the tree is organized into several major top-level categories: 'Key Assumptions' for independent variables; 'Effects' for externality costs and emission constraints; 'Demand' for energy demand structures; 'Load Shapes' for fuel-specific load definitions; 'Transformation' for energy conversion and transport; 'Resources' for indigenous production and fuel trade; 'Non-Energy Sector Effects' for non-energy GHG emissions; and 'Indicators' for user-defined results.
• The Transformation branch simulates energy conversion from extraction or import to final consumption, organized by 'module level' (e.g., electricity generation or refining) and 'process' level (e.g., specific power plants), where users define technology data such as efficiencies, capacities, and emission factors.
• LEAP provides navigation and organization tools for the tree, including a Tree Filter Toolbar to focus on model subsets without affecting calculations, and a bookmarking system (using keyboard shortcuts like Ctrl+M) to jump between specific branches and variables.

APA

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

Chicago

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

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=The Tree |url=https://cdn.leap.sei.org/help24/Screen_Layout/TreeOverview.htm |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendtree, author = {{Stockholm Environment Institute}}, title = {{The Tree}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/help24/Screen_Layout/TreeOverview.htm}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }