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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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    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.

  • The report, in text format, states whether the production is nominal or if some past Ensemble forecasts from the D-1 or D-2 days, were used as a substitute of D day forecasts. This is the case if too many individual models forecasts are missing. The report covers forecasts from step +73H to step +96H, i.e for validity time D+3 01 UTC to validity time D+4 00 UTC (D 00 UTC : reference time). More information may be found in the Multi Model Ensemble Technical Guide available for download on the CAMS website.

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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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    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.

  • Categories  

    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 IFS meteorological model. The trajectories cover a global area, from step 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.

  • The report, in text format, states whether the production is nominal or if some past Ensemble analyses from the D-1 or D-2 days, were used as a substitute of D day analysis. This is the case if too many individual models forecasts are missing. The report covers analyses from step -24H to step -1H, i.e for validity time D-1 00 UTC to validity time D-1 23 UTC (D 00 UTC : reference time). More information may be found in the Multi Model Ensemble Technical Guide available for download on the CAMS website.

  • The report, in text format, states whether the production is nominal or if some past Ensemble forecasts from the D-1 or D-2 days, were used as a substitute of D day forecasts. This is the case if too many individual models forecasts are missing. The report covers forecasts from step +49H to step +72H, i.e for validity time D+2 01 UTC to validity time D+3 00 UTC (D 00 UTC : reference time). More information may be found in the Multi Model Ensemble Technical Guide available for download on the CAMS website.

  • The report, in text format, states whether the production is nominal or if some past Ensemble forecasts from the D-1 or D-2 days, were used as a substitute of D day forecasts. This is the case if too many individual models forecasts are missing. The report covers forecasts from step +0H to step +24H, i.e for validity time D 00 UTC to validity time D+1 00 UTC (D 00 UTC : reference time). More information may be found in the Multi Model Ensemble Technical Guide available for download on the CAMS website.