The WGNE is a joint working group between the World Climate Research Programme (WCRP) and the World Meteorological Organization (WMO) Commission for Atmospheric Sciences (CAS), overseeing the World Weather Research Programme (WWRP) and Global Atmosphere Watch (GAW).
The WGNE has the responsibility of fostering the development of atmospheric circulation models for use in weather, climate, water and environmental prediction on all time scales and diagnosing and resolving shortcomings (WMO/TD 121). The WCRP’s JSC, CAS and WGNE all promote co-ordinated numerical experimentation for validating model results, observed atmospheric properties, exploring the natural and forced variability and predictability of the atmosphere, (e.g. the Atmospheric Model Intercomparison Project, AMIP), as well as studies aimed at refining numerical techniques, and the formulation of atmospheric physics processes. WGNE also monitors the advances in data assimilation and analysis methods and is the focal point in the WCRP for encouraging and reviewing the reanalysis projects carried out at various centres with fixed state-of-the-art assimilation systems providing a multi-year homogenous data set for a range of atmospheric and climate diagnostic studies.