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CAMS European air quality forecasts

CAMS produces specific daily air quality analyses and forecasts for the European
domain at significantly higher spatial resolution (0.1 degrees, approx. 10km)
than is available from the global analyses and forecasts. The production is
based on an ensemble of eleven air quality forecasting systems across Europe. A
median ensemble is calculated from individual outputs, since ensemble products
yield on average better performance than the individual model products. The
spread between the eleven models are used to provide an estimate of the forecast
uncertainty. The analysis combines model data with observations provided by the
European Environment Agency (EEA) into a complete and consistent dataset using
various data assimilation techniques depending upon the air-quality forecasting
system used. In parallel, air quality forecasts are produced once a day for the
next four days. Both the analysis and the forecast are available at hourly time
steps at seven height levels.

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