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    Forecasts of pollutant plume dispersion in the atmosphere for a period ranging from 0hour to 24hours starting from the moment of the pollutant release . The time step is either 30 minutes or 1hour depending on the output data format.The resolution of the dispersion model is 1 km on a regular grid of 60 km X 60 km, and 4 km on a regular grid of 240 km x 240 km centered on the source of the emission. The PERLE system is based on a lagrangian particular dispersion model forced by the MesoNH meteorological model coupled with AROME meteorological model. The outputs are : concentration, time-integrated concentrations and deposit fields. The available data formats are GRIB edition 2, PNG, KMZ and Shape file. Data access is restricted to institutional authorities.

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    Forecasts using backward-time modelling of the dispersion of radionuclide plumes in the atmosphere. Forecasts cover a global area for a period ranging from 0hour to 360hours starting from the moment of the atmospheric release. The time step is 3 hours, on a regular grid of 1degree X 1degree, in text format. Unit: Bq/m3. The forecasts are based on the MOCAGE-ACCIDENT model which is a specific version of the atmospheric dispersion model MOCAGE (Model of Atmospheric Chemistry of Large Scale) developed at Météo-France by CNRM. Meteorological forcing is provided by ARPEGE data. The produced fields deal with radionuclide concentrations. Data access is restricted to institutional authorities.

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    Forecasts of pollutant plume dispersion in the atmosphere for a period ranging from 0hour to 24hours starting from the moment of the pollutant release . The time step is either 30 minutes or 1hour depending on the output data format.The resolution of the dispersion model is 1 km on a regular grid of 60 km X 60 km, and 4 km on a regular grid of 240 km x 240 km centered on the source of the emission. The PERLE system is based on a lagrangian particular dispersion model forced by the MesoNH meteorological model coupled with ARPEGE meteorological model. The outputs are : concentration, time-integrated concentrations and deposit fields. The available data formats are GRIB edition 2, PNG, KMZ and Shape file. Data access is restricted to institutional authorities.

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    Forecasts of pollutant plume dispersion in the atmosphere for a period ranging from 0hour to 24hours starting from the moment of the pollutant release . The time step is either 30 minutes or 1hour depending on the output data format.The resolution of the dispersion model is 1 km on a regular grid of 60 km X 60 km, and 4 km on a regular grid of 240 km x 240 km centered on the source of the emission. The PERLE system is based on a lagrangian particular dispersion model forced by the MesoNH meteorological model coupled with IFS model. The outputs are: concentration, time-integrated concentrations and deposit fields. The available data formats are GRIB edition 2, PNG, KMZ and Shape file. Data access is restricted to institutional authorities.

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    Volcanic ash occurrence within a radius of 150km around a volcano. Occurrences are computed by using a large number of particles distributed on the contaminated vertical column and subjected to wind advection and deposition process on the ground (sedimentation). Horizontal dispersion is estimated using vertical wind distribution. The wind field is provided by the ARPEGE meteorological model. Occurrences are computed by Météo-France for aeronautical support, available for 18 pressure levels in hPa (1000, 950, 900, 850, 800, 700, 600, 500, 400, 300, 250, 200, 100, 70, 50, 30, 20) and for aeronautic flight levels FL0-FL200, FL200-FL350 and FL350-FL550. Occurences are computed on a regular horizontal grid 0.1deg x 0.1deg around the source by cutting out according to the quantiles or by using a linear manner. As a result, a visualization of the total ash cloud cover, and an estimation of areas of greater density, are provided. Outputs are in GRIB format. Data access is restricted to institutional authorities.

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    Volcanic ash occurrence within a radius of 150km around a volcano. Occurrences are computed by using a large number of particles distributed on the contaminated vertical column and subjected to wind advection and deposition process on the ground (sedimentation). Horizontal dispersion is estimated using vertical wind distribution. The wind field is provided by the IFS meteorological model. Occurrences are computed by Météo-France for aeronautical support, available for 18 pressure levels in hPa (1000, 950, 900, 850, 800, 700, 600, 500, 400, 300, 250, 200, 100, 70, 50, 30, 20) and for aeronautic flight levels FL0-FL200, FL200-FL350 and FL350-FL550. Occurences are computed on a regular horizontal grid 0.1deg x 0.1deg around the source by cutting out according to the quantiles or by using a linear manner. As a result, a visualization of the total ash cloud cover, and an estimation of areas of greater density, are provided. Outputs are in GRIB format. Data access is restricted to institutional authorities.

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    Forecasts of volcanic ash cloud into the atmosphere. Forecasts cover a global area for a period ranging from 0hour to 94hours starting from the moment of the atmospheric release. The time step is 6 hours, on a regular 0.5degree x 0.5degree grid. The forecasts are based on the MOCAGE-ACCIDENT model which is a specific version of the atmospheric dispersion model MOCAGE (Model of Atmospheric Chemistry of Large Scale) developed at Météo-France by CNRM. Meteorological forcing is provided by the ARPEGE data or the IFS data. The produced fields deal with concentration, time-integrated concentrations and deposits fields. Available data format for outputs are GRIB Edition2, PNG, KMZ and Shape File. Data access is restricted to institutional authorities.

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    Lagrangian trajectories of three particles launched at 500, 1500 and 3000m levels. Particles are then subjected to wind advection. The wind field is provided by the ARPEGE meteorological model. The trajectories cover a global area, from 0h to 84h, starting from the time of release. The time step is 6 hours. Outputs are in png format. Data access is restricted to institutional authorities.

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    Leeward geographical area directly impacted within a radius of 10km by a radionucleide release. Outputs cover French nuclear sites. The principle is based on the in situ wind measurements provided by the SEMENCE institutional network. These measurements are combined and given as an input to a particle Lagrangian dispersion model. Particle dispersion provides an observed leeward area directly impacted by a radioactive release during a one hour period. In case of missing observations, they will be supplemented by wind data given by the AROME meteorological model. Available data format for outputs are PNG and KMZ. Data access is restricted to institutional authorities.

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    Forecasts of pollutant plume dispersion into the atmosphere. Forecasts cover a global area for a period ranging from 0hour to 94hours starting from the moment of the atmospheric release. The time step is 6 hours, on a regular 0.5degree x 0.5degree grid. The forecasts are based on the MOCAGE-ACCIDENT model which is a specific version of the atmospheric dispersion model MOCAGE (Model of Atmospheric Chemistry of Large Scale) developed at Météo-France by CNRM. Meteorological forcing is provided by the ARPEGE data or the IFS data. The produced fields deal with concentration, time-integrated concentrations and deposits fields. Available data format for outputs are GRIB Edition2, PNG, KMZ and Shape File. Data access is restricted to institutional authorities.