
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!
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
Luca Casamassima (IIASA)
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
Paul Natsuo Kishimoto (IIASA)
16:45-17:15: Reference energy system (RES) flow diagram for general commodities and technologies & Sankey diagrams
Florian Maczek & Luca Casamassima (IIASA)
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
Philip Hackstock (IIASA)
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
Fridolin Glatter & Siddharth Joshi (IIASA)
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
Online and in Wodak room at IIASA (Laxenburg, Austria)
AI for Climate Science seminar series: Why We Still Need Traditional Climate and Earth System Models – and How They Might Be Improved
Austrian Academy of Sciences
Partnering for progress: Strengthening science and policy through multilateral collaboration for tomorrow
Conference Center, Laxenburg, Austria
IIASA to Host the First-Ever Climate Overshoot Conference from September 30th to October 2nd, 2025
International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria