The Energy, Climate, and Environment (ECE) Program will host the fourth MESSAGEix Community Meeting in May 2025. The meeting aims to bring together researchers working on integrated assessment and/or energy system modeling using open source software. 

The MESSAGEix Community Meeting is a platform for showcasing new developments and features of the MESSAGEix modeling framework, sharing knowledge on various modeling approaches and applications of the framework, and discussing best practices in model-based policy analysis. The meeting is a place for facilitating collaboration between MESSAGEix users from around the world, by creating a forum where users can share their latest research outcomes and modeling experiences.

The Community Meeting also aims to inspire new users of the MESSAGEix framework on the range of available possibilities and link them with other users in order to help them advance their modeling work.  

With this fourth meeting, we hope to further grow and sustain the MESSAGEix community who is already contributing to major international assessments and many scenario studies at global, national, and subnational scales. Sharing knowledge and mutual support will help find new ways to apply modeling for offering solutions to complex problems related to climate change mitigation, impacts, adaptation, and energy as well as broader sustainability transitions. 

The meeting will be in a hybrid format, with the possibility of attending online or in person. For attending the meeting and receiving related material, please kindly fill in the online registration form.
Participation in the MESSAGEix Community Meeting is free of charge. However, please note that travel expenses for in-person participation have to be covered by participants.

The meeting will be held on the 20th and 21st of May, 2025. On both days, it will last roughly from 9:00 to 17:00 CEST, and on the first day, we warmly invite you to join us for a social dinner event. The agenda will depend on the current work of the community, so please volunteer to share any work you have done with MESSAGEix with the community. This includes all kinds of scenario analysis, national pathways, transition to net zero emissions, sector-specific analysis, methodological improvements, linkage to other models and tools, policy-maker engagement, teaching experiences, and much more. All contributions are welcome!

Preliminary Agenda for the MESSAGEix Community Meeting 2025 © Fridolin Glatter | IIASA

Preliminary Agenda for the MESSAGEix Community Meeting 2025 as of 07/04/2025

Please note that the agenda is preliminary as of now. It was last updated on 07/04/2025, but may be updated again closer to the meeting date, so please revisit this page for the latest information.

By popular demand, we have again asked all presenters to please send us (a draft version of) their presentations prior to the meeting so that you can already study the presentation materials beforehand and can focus more on the talk during the talk. Please see the collection of presentation materials to find out if the talk you are interested in has already been uploaded. We will update this collection whenever we receive new material.

Please note that only people who filled out the registration survey are able to see the collection.

Detailed Agenda - Tuesday, May 20:

Opening remarks and welcome words

09:00-09:20: Opening remarks and welcome words

A warm welcome and introduction to this year's MESSAGEix community meeting delivered by Volker Krey, Fridolin Glatter, and Paul Natsuo Kishimoto (all IIASA).

Energy Systems Transformation

09:20-09:50: Energy system transformations for the phase-out of fossil fuels towards 1.5°C future

Shotaro Mori (Kyoto University, Japan)

I will present my 2024 YSSP project, a multi-model analysis of fossil fuel phase-out using two global energy system models, including MESSAGEix.

09:50-10:20: Green hydrogen implementation in MESSAGE

10:20-10:50: Power/Industry sector modeling using MESSAGEix - case of Korea

Jongchul Bang (Greenhouse Gas Inventory and Research Center of Korea)

 

Community Initiatives

11:15-11:45: Scenario Compass

Bas van Ruijven (IIASA)

11:45-12:15: The Justice Model Intercomparison Project (JustMIP)

Elina Brutschin (IIASA)

12:15-12:45: The Korean Energy Modeling Forum (KEMF)

To Be Confirmed

12:45-13:15: To Be Disclosed

To Be Confirmed

Carbon Management & Trade

14:15-14:45: Climate policies for Turkish power sector

Görkem Güngör (Hacettepe University, Turkiye)

The cap-and-trade mechanism will focus on the emission intensities of the power sector fossil fueled utilities. The climate mitigation potential of Türkiye ETS could be assessed using an integrated power sector model.

14:45-15:15: Enhanced weathering and ocean alkalinity implementation

Yoga Pratama (IIASA)

Scenario Tools (MESSAGE-specific)

15:45-16:15: Data sources, import & calibration

Siddharth Joshi (IIASA)

16:15-16:45: Model data pre- & post-processing with genno

16:45-17:15: Reference energy system (RES) flow diagram for general commodities and technologies & Sankey diagrams

17:15-17:45: MESSAGEix-Canada: A new open-source provincial model

Muhammad Awais & Students (IIASA & University of Victoria, Canada)

We will present updates on the MESSAGEix-Canada model.

Detailed Agenda - Wednesday, May 21:

Justice & Equity

09:00-09:30: Exploring fair and efficient pathways for managing climate overshoot responsibility

Setu Pelz (IIASA)

This talk examines how to fairly and effectively manage 1.5°C overshoot scenarios by integrating regionally differentiated carbon budgets and various forms of international cooperation into an up-to-date integrated assessment modelling framework. We compare outcomes across various socioeconomic pathways and effort-sharing approaches, identifying key drivers of regional climate finance needs and mitigation burdens, and highlighting strategies for aligning near- and long-term collective action with principles embedded in international climate agreements

09:30-10:00: Decent Living Energy (DLE)

Jarmo Kikstra (IIASA)

10:00-10:30: Climate resilient development for Bhutan/ Mexico SSPs (adaptation perspectives)

Miho Kamei (Institute for Global Environmental Strategies, Japan)

Scenario Tools (universal)

10:45-11:15: Using deep learning to generate key variables in global climate change mitigation scenarios

Yang Ou (Peking University, China)

We develop a novel deep learning (DL) framework to generate key variables through synthetic mitigation scenarios aligned with the Intergovernmental Panel on Climate Change (IPCC) AR6 scenario database. This study illustrates the potential of DL to complement IAM approaches and provides a basis for improving the scalability of DL frameworks to handle more complex mitigation scenario generation tasks.

11:15-11:45: Generalized levelized cost

Takuya Hara (Toyota, Japan)

11:45-12:15: Automated scenario processing

Sharing Experience

13:15-14:15: Short interventions on planned and ongoing projects

  • Exploring distributive dynamics in the MESSAGEix-MACRO framework, Lukas Eggert (Umweltbundesamt [UBA], Germany)
  • MESSAGEix-Austria:  The vision for developing a national integrated assessment model, Behnam Zakeri & Josefine Gruber (WU & IIASA)
  • Modeling barriers and drivers of household-level energy transition in Ethiopia: an interdisciplinary approach, Habtamu Demiessie (University of Ibadan, Nigeria)
  • Open Discussion

14:15-14:45: New developments from the MESSAGEix Team

Demand-side Modeling with the MESSAGEix Framework

15:45-16:15: Modeling high granularity demand sectors in integrated assessment models: MESSAGE-BMT runs

Yiyi Ju (IIASA)

16:15-16:45: Update of the transport implementation

Aneeque Javaid (IIASA)

16:45-17:15: MESSAGE_iL work on transport module results and ministry of energy scenarios

Vered Blass (Tel-Aviv University, Israel, & IIASA)

17:15-17:45: Prospective scenarios of mobility infrastructure stocks, flows and emissions

André Baumgart (University of Natural Resources and Life Sciences [BOKU], Austria)

Mobility infrastructure is expected to grow rapidly in the decades to come, particularly in the Global South, potentially locking in a considerable portion of the remaining global carbon budget. A combined demand- and supply-side approach can reduce both material consumption in infrastructure expansion, maintenance and replacement, and mitigate climate change most effectively.

This meeting has been supported by the COMMITTED project which is funded by the European Commission DG CLIMA Service Contract No. 14020241/2022/884157/SER/CLIMA.A.2.

Upcoming Events

Matosinhos, a neighboring municipality of Porto, Greater Porto Metropolitan Area (Portugal)

CircEUlar featured in a Carbon Neutrality Exhibition in Portugal

Vienna, Austria & Online

IIASA at EGU General Assembly 2025

Rome, Italy

GEO Global Forum 2025

Vilnius, Lithuania

Cities Mission Conference

Oslo, Norway

The 8th Annual CeFH Symposium

Laxenburg, Austria (IIASA) and Online

MESSAGEix Community Meeting 2025

Austrian Academy of Sciences

The Great Policy Debate: National Interests vs. Global Goals

Vienna, Austria

Living Planet Symposium 2025

Samos, Greece

IIASA at IDRIM2025

International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria

INQUIMUS workshop 2025 edition: Centering Justice in Climate Risk Management for Transformative Change