| ACCENT | EU | Atmospheric Composition Change -- The European Network of Excellence |
| AEROCOM | EU | Aerosol Comparisons between Observations and Models |
| EC-EARTH | NL | An Earth System Model based on the ECMWF seasonal forecast model |
| EUCAARI | EU | European Integrated Project on Aerosol-Cloud-Climate-Air Quality Interactions |
| GAINS | EU | Greenhouse Gas and Air Pollution: Interactions and Synergies |
| HYMN | EU | HYdrogen, Methane and Nitrous oxide: trend variability, budgets and interactions with the biosphere |
| IMEAS | NL | Improving Methane Emission estimates Aided by Satellite data |
| MACC | EU | Monitoring Atmospheric Composition & Climate |
| MAP | EU | Marine Aerosol Production |
| NitroEurope | EU | The nitrogen cycle and its influence on the European greenhouse gas balance |
| SCOUT | EU | Stratospheric-Climate links with emphasis on the UTLS |
| Nameless 1 | NL | Chemistry-Climate interactions and the role of increasing greenhouse gases on the atmospheric ozone budget |
| FINISHED PROJECTS | ||
| GEMS | EU | Global and regional Earth-system (atmosphere) Monitoring using Satellite and in-situ data |
| EVERGREEN | EU | EnVisat for Environmental Regulation of GREENhouse gases |
| PHOENICS | EU | Particles of Human Origin Extinguishing Natural solar radiation In Climate Systems |
| TOPOZIII | EU | Towards the Prediction of Stratospheric Ozone III |