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Definition of Future Operational Atmospheric Composition Monitoring Satellite Missions: Final Results of the CAPACITY study

Hennie Kelder(1) and Michiel van Weele(1)

(1) KNMI, Wilhelminalaan 10, 3730 AE De Bilt, Netherlands


Future extensions of the operational system for the global monitoring of atmospheric composition have been investigated. Focus has been given to applications in air quality forecasting, ozone/UV forecasting, air quality monitoring and assessment, protocol monitoring (e.g. Montreal, Kyoto) and assessments of climate change and ozone layer recovery. Level-2 data and instrument requirements have been derived for each of the envisioned applications. At present it is most urgent is to set up a system that can meet Air Quality requirements. Stringent requirements on temporal resolution and horizontal spatial resolution can not be met with the missions that are planned for the next decade (2010-2020). A combination of satellites is needed, either in a combination of a mission in low-earth orbit and a mission in geostationary orbit, or by multiple satellites in low-inclination orbit. Climate protocol monitoring can be efficiently integrated in the Air Quality combined mission. Total ozone monitoring is at present guaranteed by GOME-2 on MetOp. For the monitoring and assessment of the upper troposphere and stratosphere it is recommended to add an operational limb component to the system in the post-EPS timeframe (2015+) The definition of the required satellite components as part of the future integrated observation system for atmospheric composition has been carried out by a large European consortium in an ESA commissioned 18-month study named CAPACITY (2003-2005). Operational monitoring of atmospheric composition is called for within, e.g., GMES (Global Monitoring of Environment and Security), the European contribution to the international Global Earth Observation System of Systems GEOSS. .


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Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry