Author(s)

C. Lac, F. Bonnardot, I. Sandu, M. Bouzom, F. Bompay & D. Maro

Abstract

A modelling system, PERLE, has been developed at Meteo-France, for the Crisis Meteorological Cell (CMC) of atmospheric accidental release, in case of emergency. Mesoscale meteorological fields are simulated by the nonhydrostatic MESO-NH model (8km and 2km resolution nested grids), that also supply an overview of the plume on a regional scale with an eulerian passive tracer. The dispersion model is a lagrangian particle model, to describe the pollutant cloud in the vicinity of the release during the first critical few hours. Two stochastic dispersion models have been evaluated and compared: DIFPAR and SPRAY. The performance of PERLE is tested against a large range of stability and turbulence conditions. A set of fourteen test cases has been conducted on 85Kr measurements, released in La Hague

Keywords