Introduction >> Forecast
Three-day air quality forecasts are drawn up everyday and published via the PREV’AIR system. They are provided for ozone, nitrogen dioxide and particles, three pollutants hat are regulated in accordance with their impact on health and the environment. Particle-related information is divided into two categories: PM10, particles with a diameter of less than 10µm, and PM2.5, particles with a diameter of less than 2.5µm
The forecasts are available on different spatial scales according to pollutant types:
The spatial resolution at the global, European and French scales is respectively equal to 4°, 0.5° and 0.1°
WARNING!!! The air quality forecasts published via PREV’AIR are obtained from a numerical modelling process. They are thus flawed by uncertainties relating to the status of scientific knowledge in the field of the physics and chemistry of air pollution, as well as by the quality of the input data required for the model’s operation.
The forecasts for each area are carried out in several stages:
The expected concentrations are available on this server in graphic (forecast maps) and numerical formats (demande d'accès à des données numériques ).