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DIAMOND · Project

Open-Source Climate Modeling Tools for Net-Zero Strategy and Investment Planning

environmentTestedTRL 5

Imagine having a giant digital simulator that predicts how the whole world reacts to climate laws, from how people shop to how money flows. Most of these simulators are locked in secret labs, but this project is making six of the best ones free and open for everyone. It's like moving from a secret recipe to an open cookbook that anyone can improve to find the fastest way to a green economy.

By the numbers
6
leading IAMs updated and opened
41
stakeholder-informed research questions
8
multi-stakeholder discussion groups
32
total deliverables
The business problem

What needed solving

Current climate models are often 'black boxes' that lack transparency and fail to account for how labor markets, finance, and human behavior actually work. This makes it risky for businesses to rely on them for long-term investment decisions.

The solution

What was built

Six upgraded, open-source Integrated Assessment Models (IAMs). This includes the release of CLEWs-EU and NEMESIS-World on GitHub with full documentation.

Audience

Who needs this

ESG AnalystsEnergy Policy AdvisorsGreen Fund ManagersCorporate Sustainability Officers
Business applications

Who can put this to work

Financial Services
enterprise
Target: Investment Bank or Asset Manager

If you are an investment firm dealing with climate risk in your portfolio — this project developed open-source versions of 6 leading models that provide better data on investment strategies and financial sector impacts. This allows for more transparent risk assessment of green assets.

Energy
mid-size
Target: Renewable Energy Developer

If you are an energy company dealing with uncertain long-term policy shifts — this project developed upgraded models that include detailed demand-side measures and cross-sectoral interactions. This helps you predict where energy demand will shift as cities go net-zero.

Consulting
SME
Target: Sustainability Consultancy

If you are a consultancy dealing with complex ESG reporting for clients — this project developed a transdisciplinary approach and open tools that link climate mitigation with labor markets and equity. You can use these to provide more legitimate and validated sustainability roadmaps.

Frequently asked

Quick answers

What is the cost to use these models?

Based on available project data, the project focuses on producing open-source versions of the models, implying they will be available via platforms like GitHub without a direct purchase price.

Can these models be used for industrial-scale planning?

Yes, the project aims to support climate and development policies at all scales and improve geographic granularity to make them relevant for real-world implementation.

Who owns the intellectual property or licensing?

The project specifically aims to 'fully open' six leading models and release them on GitHub, indicating an open-science licensing approach rather than proprietary IP.

How do I integrate these tools into my existing workflow?

The project is creating communities of practice and capacity development to lower entrance barriers, with some models already released on GitHub with online documentation.

When will the final versions be available?

The project period runs until 2026-11-30, with some stable versions already released on GitHub.

Consortium

Who built it

The consortium is highly diverse, comprising 20 partners across 12 countries. It maintains a strong balance between academic research and practical application, with 11 universities and 5 industry partners (including 4 SMEs). This 25% industry ratio suggests the tools are being developed with a focus on practical utility and real-world data requirements rather than just theoretical science.

How to reach the team

Contact EREVNITIKO PANEPISTIMIAKO INSTITOUTO SYSTIMATON EPIKOINONION KAI YPOLOGISTON in Greece

Next steps

Talk to the team behind this work.

Contact us to find the specific GitHub repository for the IAM model that fits your industry.

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