WGNE’s history can be traced back to 1967 when it was formed under Global Atmospheric Research Programme (GARP). In 1985, WGNE evolved under the joint supervision of the Commission for Atmospheric Sciences (CAS) and the World Climate Research Programme (WCRP) into a group aiding the development of atmospheric models for use across cross-timescales. Following the 2020 WMO Constituent Body Reform, it now reports to the newly established Research Board. The purpose of WGNE is to foster collaborative development of models of the Earth system (design, implementation, error diagnosis and model revision) across the full range of temporal and spatial scales.

The Working Group is committed to promoting and coordinating the global, long-term development of complex coupled Earth System Models (ESMs) to simulate fast weather-climate-water-biogeochemical processes for research and operational applications. They identify, prioritise, link and understand common systematic errors across time scales in coupled ESMs, and share solutions within the model development community. The group promotes the use of innovative approaches, such as machine learning, and provides guidance on the use of exascale computing to address scalability issues in Earth system modelling. They provide advice on the appropriate level of complexity required in coupled ESMs for specific applications and maintain close links with specialised modelling, user, working or focus groups. In addition, they identify technological and scientific trends in Earth system modelling and advise the Global Data Processing and Forecasting System (GDPFS) and research groups on emerging issues. The group promotes quality assurance by facilitating inter-comparison and exchange of internationally accepted model assessment information, ensuring efficient and accurate use of models in operational weather and climate services. Finally, they advise the Research Board and other WMO research programmes on the development of ESMs.

WGNE is supporting numerical experimentation research activities of the

Cover image: “Weather Forecasting Factory” by Stephen Conlin, 1986. Based on the description in Weather Prediction by Numerical Process, by L.F. Richardson, Cambridge University Press, 1922, and on advice from Prof. John Byrne, Trinity College Dublin. Image: ink and water colour, c. 50 x 38.5 cm.© Stephen Conlin 1986. All Rights Reserved.

Read the Working Group's Terms of Reference on Zenodo: https://doi.org/10.5281/zenodo.22128866