The Annual Seminar will provide an Earth System view of observations, identifying where the current global observing system is meeting new and existing Earth System requirements. How effectively the current observing system is being used for NWP and reanalysis will be explored, as well as consideration to gaps and how they may be addressed in the future. The seminar will consider science and technical issues common to observations across multiple components, and also issues specific to these components.

The overall objective of WCRP-WWRP Symposium on Data Assimilation and Reanalysis is to review latest developments and address issues of common interest to data assimilation and reanalysis communities, such as Earth system and coupled approaches, impacts of observing systems, systematic errors, emerging AI and Machine learning techniques and collaborative platforms.

More information will become available on the ECMWF website: https://events.ecmwf.int/event/217/