This EPESC – LEADER Science Meeting will bring together the wider scientific community working on these two WCRP activities to share and discuss emerging topics and issues on the design and delivery of an integrated capability for quantitative observation, explanation, early warning and prediction of Earth System Change on global and regional spatial scales and annual to decadal (A2D) timescales. Both groups will share insights from analysis of large ensembles of climate model experiments to advance understanding and attribution of dynamically-driven extremes. Sessions are being planned to share the work and address the needs of each of the Working Groups.
Goals
• To bring together the full EPESC and LEADER communities for cross-working group coordination and pollination of ideas, approaches and results.
• To share progress on understanding the role of external forcing and internal variability in different regions of the world, and exchange ideas on overcoming challenges in assessing and attributing natural and anthropogenic drivers of climate hazards.
• To share research using the Large Ensemble Single Forcing Model Intercomparison Project (LESFMIP) to diagnose circulation responses to model forcing, the role of model error, and the predictability of large-scale circulations.
• To advance the vision of operationalization of decadal forecasts, and build towards the vision of an integrated capability for attribution, early warning and prediction of Earth System Change on global and regional spatial scales and annual to decadal (A2D) timescales.

In addition to presentations from the core working groups of LEADER/EPESC and ensuing discussions, the meeting will include contributed talks and posters. Should you be involved in analyses that are of relevance to EPESC and/or LEADER, or that will help inform future plans of LEADER/EPESC, please submit an abstract about this work below. The abstract submission deadline is March 22, 2025. Presenters can request oral or poster formats for their presentation, and it is fine to submit multiple abstracts. We hope to send decisions on accepted abstracts within a few weeks of the closing date. Please feel free to forward this message more widely as you see fit.  

For additional details and for the form to submit your abstract, please see: https://www.wcrp-climate.org/epesc-leader-meeting2025 . The closing date is March 22nd.