Probing ETEX-II data set with inverse modelling M. Krysta1,2,*, M. Bocquet1,2, and J. Brandt3 1Université Paris-Est, CEREA, Research and Teaching Centre in Atmospheric Environment, Joint Laboratory École Nationale des Ponts et Chaussées/EDF R&D, 6–8 avenue Blaise Pascal, 77455 Champs sur Marne, France 2INRIA, Paris-Rocquencourt Research Centre, France 3Department of Atmospheric Environment, National Environmental Research Institute, Aarhus University, Frederiksborgvej 399, P.O. Box 358, 4000 Roskilde, Denmark *currently at: Laboratoire Jean Kuntzmann, University of Grenoble, BP 53X, 38041 Grenoble cedex, France
Abstract. We give here an account on the results of source inversion of the
ETEX-II experiment. Inversion has been performed with the
maximum entropy method on the basis of non-zero measurements and in
conjunction with a transport model POLAIR3D. The discrepancy
scaling factor between the reconstructed and the true mass has been
estimated to be equal to 7. The results contrast with the method's
performance on the ETEX-I source. In the latter case its mass has
been reconstructed with an accuracy exceeding 80%. The large value
of the discrepancy factor for ETEX-II could be ascribed to modelling
difficulties, possibly linked not to the transport model itself but rather to
the quality of the measurements.
Citation: Krysta, M., Bocquet, M., and Brandt, J.: Probing ETEX-II data set with inverse modelling, Atmos. Chem. Phys., 8, 3963-3971, doi:10.5194/acp-8-3963-2008, 2008.