The Sixth WCRP International Conference on Reanalysis (ICR6) will take place in Tokyo from 28th October to 1st November 2024 under initiatives from the World Climate Research Programme (WCRP), the Japan Meteorological Agency, “Climate change actions with co-creation powered by Regional weather information and E-technology” (ClimCORE), and the University of Tokyo.

Reanalyses are digital datasets that represent the evolution of the Earth’s climate system to date, enabling us to put current extreme weather events into a climatic context for diagnosis, revisit past climate events and monitor long-term changes in the climate system. There have been continued efforts to improve data quality and to include not only the atmosphere but also other Earth system components (e.g., land, ocean and cryosphere). Demands for higher resolution and quality have become a driving force of regional reanalysis. Today’s rapid development in artificial intelligence and machine learning (AI/ML) has been creating new opportunities for even wider application of reanalysis data.

ICR6 will bring together reanalysis producers, observation data providers, numerical modelers and members of the user community to discuss progress, challenges and future priorities in the field. The ultimate aim is to guide the development and use of reanalysis data in science, public services, policy making and social/economic activity.

The conference will focus on:

• Global reanalysis production status/plans
• Regional reanalysis production status/plans
• Observations for reanalyses
• Methods for reanalyses
• Production of reanalyses
• Evaluations of reanalyses
• Applications of reanalyses in science and society
• Exploration of machine learning (ML) approaches in the context of reanalysis

Abstracts can be submitted online from January 2024 to April 2024.