Scenarios

The document describes how LEAP uses scenarios as self-consistent storylines to model future energy systems under various socioeconomic and policy conditions. It details the relationship between scenarios and Current Accounts data, the inclusion of sensitivities, and the use of a hierarchical expression inheritance system to streamline data management.

• In LEAP, scenarios are defined as self-consistent narratives used to evaluate how energy systems evolve based on specific socioeconomic settings and policy conditions, allowing users to conduct "what if" analyses on factors such as appliance efficiency, generation capacity expansion, and renewable energy adoption.
• All scenarios in the software rely on a shared set of Current Accounts data, which can consist of a single base year or multiple historical years; the scenario timeline begins from the First Scenario Year and continues to the End Year.
• LEAP incorporates sensitivities—variations in socioeconomic assumptions—within scenarios, necessitating that cost-benefit analyses only compare scenarios that share the same socioeconomic assumptions. To reduce data entry, LEAP employs a hierarchical structure where scenarios inherit expressions from parent scenarios unless specific differences are entered.

APA

Stockholm Environment Institute (n.d.). Scenarios. https://cdn.leap.sei.org/Help24/Concepts/Scenarios.htm

Chicago

Stockholm Environment Institute. Scenarios. n.d. https://cdn.leap.sei.org/Help24/Concepts/Scenarios.htm.

Wikipedia

{{cite report |author=Stockholm Environment Institute |title=Scenarios |url=https://cdn.leap.sei.org/Help24/Concepts/Scenarios.htm |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{stockholmenvironmentinstitutendscenarios, author = {{Stockholm Environment Institute}}, title = {{Scenarios}}, institution = {Stockholm Environment Institute}, url = {https://cdn.leap.sei.org/Help24/Concepts/Scenarios.htm}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }