Global and regional Earth-system (Atmosphere) Monitoring using Satellite and in situ data (GEMS)

GEMS developed comprehensive monitoring and forecasting systems for trace atmospheric constituents important for climate and air quality. The systems provided the basis for value-added data and information services to be developed as part of Europe's Global Monitoring for Environment and Security initiative. These services:

• provide global data in support of conventions and protocols on climate change, depletion of stratospheric ozone and long-range transport of atmospheric pollution;
• provide information in support of development and implementation of European environmental policy;
• address areas of key uncertainty in climate forcing identified by the Intergovernmental Panel on Climate Change (IPCC);
• provide improved operational air-quality forecasts and a means for assessing the impact of climate variability and change on regional air quality;
• provide improved monitoring and forecasting of UV radiation and solar-energy resources;
• support downstream services for end-users;
• complement the weather and climate services provided by the European Meteorological Infrastructure.