AIFS-COMPO: A Global Data-Driven Atmospheric Composition Forecasting System
We introduce AIFS-COMPO, a skilful medium-range data-driven global forecasting system for aerosols and reactive gases. Building on the ECMWF Artificial Intelligence Forecast System (AIFS), AIFS-COMPO employs a transformer-based encoder-processor-decoder architecture to jointly model meteorological and atmospheric composition variables. The model is trained on Copernicus Atmosphere Monitoring Service (CAMS) reanalysis, analysis, and forecast data to learn the coupled dynamics of weather, emissions, transport, and atmospheric chemistry. We evaluate AIFS-COMPO against a range of atmospheric composition observations and compare its performance with the operational CAMS global forecasting syst...
| Authors | Paula Harder, Johannes Flemming, Mihai Alexe et al. |
|---|---|
| Primary category | physics.ao-ph |
| Published | 29 March 2026 |
| Last updated at source | 29 March 2026 |
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