Reading, UK

ECMWF Annual Seminar 2023 – Earth System Reanalysis

The 2023 Annual Seminar on Earth System Reanalysis will take place from Monday 4 to Friday 8 September 2023 at Shinfield Park in Reading, UK, as an in-person meeting.

Reanalyses provide gapless snapshots of the historical weather and climate, as well as of land surface, ocean and atmospheric composition, using billions of underlying observations in an as consistent and accurate possible manner. Reanalyses are very popular datasets and are used for a wide spectrum of applications. At ECMWF reanalysis not only provides an important tool for climate monitoring but also for many other areas in research and operations.

The seminar will provide a general overview of reanalysis activities at ECMWF and around the world, embracing various domains and will explore future pathways towards enhanced coupling between these. Other topics include the range of data assimilation methodologies that are in use, collection of historical observations, validation, inter-comparison, scientific applications, challenges and research.

The seminar is part of ECMWF’s educational programme and is aimed at early career scientists as well as more established scientists who want to engage more with reanalysis. Focus will be on science and research rather than on the wide range of reanalysis applications.


If you would like to attend the Annual Seminar in-person at ECMWF’s headquarters in Reading, please submit the registration form before 28 July 2023.

The talks will be livestreamed and publicly available, you do not need to submit a registration form to follow the talks online.


Annual Seminar attendees are invited to present posters in-person at the Annual Seminar describing their latest work on the theme of the seminar. If you would like to present a poster, please complete the abstract submission form before 31 May 2023.

Young Scientists Conference Award (YSCA)

EMS supports young scientist attending the Annual Seminar on-site with one YSCA.