The EGU General Assembly 2025 (EGU25) brings together geoscientists from all over the world to one meeting covering all disciplines of the Earth, planetary, and space sciences. The EGU aims to provide a forum where scientists, especially early career researchers, can present their work and discuss their ideas with experts in all fields of geoscience.

Townhall: An update on CMIP7: forcings, data request, the REF and more (TM6)

With CMIP7 simulations due to start in many modelling centres this year, a number of key components are being finalised to enable this. The forcing datasets required to run the DECK have recently been published and the final version (v1.2) of the CMIP Assessment Fast Track Data Request was released at the end of March 2025. Together these components are being developed and delivered by a huge group of scientists across the CMIP community. Additionally, work has begun on developing the CMIP Assessment Fast Track Rapid Evaluation Framework (REF) to enable a systematic and rapid performance assessment of the models uploading Assessment Fast Track data.

The first half of this Townhall will feature updates on the forcing datasets, CMIP7 Data Request, the Rapid Evaluation Framework, and plans for a sustained mode CMIP. In the second half of the Townhall, an number of Fresh Eyes Projects will present their ongoing work.

Event location: Room N1

Event time: Wednesday 30th April 2025, 18:30-20:00

Bring your drinks from the EGU social hour – we will provide snacks for attendees!

Link to event on EGU25 website.

CMIP-relevant sessions across EGU25

1. Integrating Earth System Reconstructions and Climate Modeling: Forcing, Uncertainties, and Next-Generation Digital Twins (ITS1.6/CL0.3)
2. New developments in Earth system modelling: model evaluation, benchmarking, and constraining (CL4.9)
3. The Future Ocean – CMIP and beyond (OS1.14)
4. Feedbacks and Tipping Points: Unravelling the Past-to-Future Dynamics of Cryosphere-Climate Interactions (CL1.2.10)
5. Changes in the Arctic Ocean, sea ice and subarctic seas systems: Observations, Models and Perspectives (OS1.1)
6. Challenges in climate prediction: multiple time-scales and the Earth system dimensions (CL4.8)
7. Rapid changes in sea ice: processes and implications (CR3.3)
8. One decade of FAIR Principles: Data Reusability and Impact in Earth System Sciences (ESSI3.2)
9. Monsoon systems in the past and present and under future climate change (AS1.24)
10. Volcano-climate impacts and the stratospheric aerosol layer (AS3.16)

CMIP and WCRP-relevant Townhalls across EGU25

1. Innovative Approaches to Observations and Modelling for Improved Climate Information and Services (TM7, Monday)
2. World Climate Research Programme: Research Highlights and Future Directions (TM18, Tuesday)
3. The Pliocene Model Intercomparison Project Phase 3 (PlioMIP3)  (TM2, Tuesday)
4. Presenting the World Climate Research Programme’s Lighthouse Activity for Research on Climate Intervention: Identifying Goals, Timelines, and Outcomes and Obtaining Community Feedback (TM4, Wednesday)