System Cm-Hysplit for Nuclear Emergency Responses

The computational system Cm-Hysplit (Customized Meteorology-Hysplit) is a customized version of the well-known atmospheric model Hysplit of US NOAA, which has been extended appropriately to respond to the operational needs of EEAE (the Greek Atomic Energy Commission). The system uses for the prediction of trajectories, dispersion and deposition, the forecast gridded meteorological fields provided by EMY (the Hellenic National Meteorological Service). The data from EMY are provided every day with a purposely developed automatic procedure.

Below is an example of a 48-hours forecast of the trajectory (left) and ground deposition of Cs-137 (right), following a hypothetical release on the arbitrary date of 8 March 2001.