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Model

The NExus Solutions Tool (NEST)

The concept of nexus thinking has gained traction amongst the applied research community to examine cross-sector linkages between land, water, and energy strategies. A nexus approach identifies the interactions among sectors to better understand the synergies and trade-offs involved in meeting future resource demands in a sustainable way.
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC)
Model

Energy Multi-Criteria Analysis Tool (MCA)

An interactive Web-based scenario analysis tool which allows the concurrent assessment of multiple energy objectives
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC) Sustainable Service Systems (S3)
Model

Energy Access Interactive (ENACT)

An interactive Web-based scenario analysis tool which allows the assessment of multiple energy access policies
Energy, Climate, and Environment (ECE) Transformative Institutional and Social Solutions (TISS)
Model

LIMITS Scenario Database (LIMITS)

The LIMITS Scenario database, operated by IIASA for the LIMITS consortium, hosts the results of the LIMITS modeling comparison exercise. The LIMITS project aims at advancing the understanding of the implementation of climate policies consistent with 2 degree Celsius. The main objective of the project is to provide an assessment of the emissions reductions strategies at the level of the world and the major global economies.
Energy, Climate, and Environment (ECE)
Model

Global Energy Assessment Scenario Database (GEA)

The Global Energy Assessment (GEA) Scenario database documents results and assumptions of the GEA energy transformation pathways that underpin the GEA. The database serves as a central data repository for the dissemination of GEA scenario information.
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC) Sustainable Service Systems (S3) Transformative Institutional and Social Solutions (TISS)
Model

AMPERE Scenario database (AMPERE)

The AMPERE database, operated by IIASA for the AMPERE consortium, hosts the model results for work packages 2, 3, and 5, as well as the results from the model diagnostics project. AMPERE scenario data were used in a series of research papers, which were published in a special issue of Technological Forecasting and Social Change as well as other journals. In addition, the results were used in the 5th Assessment Report of Working Group III of the IPCC.
Energy, Climate, and Environment (ECE)
Model

Representative Concentration Pathways Database (RCP)

A database with scenarios from the integrated assessment community to expedite climate change assessments
Energy, Climate, and Environment (ECE)
Model

Low Energy Demand study (LED)

An exploratory research and resulting scenario about how far transformative changes on the energy end-use side can lead to.
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC) Sustainable Service Systems (S3)
Model

Greenhouse Gas Initiative Scenario Database (GGIDB)

A database of greenhouse gas emission mitigation scenarios
Energy, Climate, and Environment (ECE)
Model

IPCC AR5 Scenarios Database (AR5)

The IPCC AR5 Scenarios Database documents the long-term scenarios as reviewed in the Fifth Assessment Report (AR5) of Working Group III of the Intergovernmental Panel on Climate Change (IPCC).
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC) Sustainable Service Systems (S3)
Model

CD-LINKS Scenario Explorer

The CD-LINKS consortium has developed a set of consistent national and global low-carbon development pathways that take current national policies and the Nationally Determined Contributions (NDCs) as an entry point for short-term climate action and then transition to long-term goals of 1.5 and 2°C as defined by the Paris Agreement. 
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC) Sustainable Service Systems (S3)
Model

IAMC 1.5°C Scenario Explorer

This Scenario Explorer presents an ensemble of quantitative, model-based climate change mitigation pathways underpinning the Special Report on Global Warming of 1.5°C (SR15) by the Intergovernmental Panel on Climate Change (IPCC) published in 2018. The ensemble was also used and extended in the IPCC's Special Report on Climate Change and Land (SRCCL, 2019). 
Energy, Climate, and Environment (ECE) Integrated Assessment and Climate Change (IACC)
Model

Greenhouse Gas and Air Pollution Interactions and Synergies (GAINS)

A model to assess emission and pollution reduction strategies that combat air pollution and climate change simultaneously
Energy, Climate, and Environment (ECE) Pollution Management (PM)
Model

Shared Socioeconomic Pathways Scenario Database (SSP)

A dataset for quantitative projections of the so-called Shared Socioeconomic Pathways (SSPs) and related Integrated Assessment scenarios.
Energy, Climate, and Environment (ECE)
Model

Model for Energy Supply Strategy Alternatives and their General Environmental Impact (MESSAGEix)

A modeling framework for medium to long-term energy system planning, energy policy analysis, and scenario development
Energy, Climate, and Environment (ECE)

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