Data assimilation for short-range dispersion of radionuclides : An application to Wind Tunnel Data

Monika Krysta (1, 2) , Marc Bocquet (1, 2) , Bruno Sportisse (1, 2) , Olivier Isnard (3)

1 CEREA - Centre d'Enseignement et de Recherche en Environnement Atmosphérique
2 Clime - Coupling environmental data and simulation models for software integration
3 IRSN - Institut de Radioprotection et de Sûreté Nucléaire

This work contributes to improvement in consequences evaluation for a release of radioactivity to the atmosphere at local scale. An investigation of how such an improvement could be achieved with the help of variational data assimilation is presented. The measurements collected in a wind tunnel experiment are coupled to a Gaussian puff model. Capacity of finding the true source emission rate is tackled in the first place. Secondly, data assimilation is employed to accommodate the computed concentration profiles to the measured ones. Benefit from data assimilation is subject to the quantity of information contained in the measurements. Therefore, posterior analysis of the monitoring network is carried out and its quality assessed.

Mots clés: Data assimilation; Dispersion; Radionuclides

Domaines: Modélisation et simulation

Monika Krysta, Marc Bocquet, Bruno Sportisse, Olivier Isnard. Data assimilation for short-range dispersion of radionuclides : An application to Wind Tunnel Data. Atmospheric Environment, 2006, 40 (38), pp.7267-7279. ⟨10.1016/j.atmosenv.2006.06.043⟩. ⟨hal-00650966⟩