Testing the importance of accurate meteorological input fields and parameterizations in atmospheric transport modelling using dream - validation against ETEX-1

A tracer model, the DREAM, which is based on a combination of a near-range Lagrangian model and a long-range Eulerian model, has been developed. The meteorological meso-scale model, MM5V1, is implemented as a meteorological driver for the tracer model. The model system is used for studying transport and dispersion of air pollutants caused by a single but strong source as, e.g. an accidental release from a nuclear power plant. The model system including the coupling of the Lagrangian model with the Eulerian model are described. Various simple and comprehensive parameterizations of the mixing height, the vertical dispersion, and different meterological input data have been implemented in the combined tracer model, and the model results have been validated against measurements from the ETEX-1 release. Several different statistical parameters have been used to estimate the differences between the parameterizations and meterological input data in order to find the best performing solution.

[1]  F. A. Gifford,et al.  Horizontal diffusion in the atmosphere: A Lagrangian-dynamical theory , 1982 .

[2]  J. Louis.  A parametric model of vertical eddy fluxes in the atmosphere , 1979 .

[3]  G. Grell,et al.  A description of the fifth-generation Penn State/NCAR Mesoscale Model (MM5) , 1994 .

[4]  Zahari Zlatev,et al.  A Eulerian air pollution model for Europe with nonlinear chemistry , 1992 .

[5]  M. Krol,et al.  Parametrization of segregation effects due to convective boundary-layer mixing in atmospheric chemistry models , 1996 .

[6]  Z. Zlatev,et al.  Studying cumulative ozone exposures in Europe during a 7‐year period , 1997 .

[7]  Zahari Zlatev,et al.  Studying Long-Range Transport from Accidental Nuclear Releases by Mathematical Models , 1997, LSSC.

[8]  A. Blackadar,et al.  High resolution models of the planetary boundary layer , 1979 .

[9]  Zahari Zlatev,et al.  Using partitioned ode solvers in large air pollution models , 1998 .

[10]  Torben Mikkelsen,et al.  Description of the riso puff diffusion model , 1984 .

[11]  R. Berkowicz,et al.  Nocturnal boundary-layer height: Observations by acoustic sounders and predictions in terms of surface-layer parameters , 1988 .

[12]  J. Christensen.  The Danish Eulerian Hemispheric Model : A three-dimensional air pollution model used for the Arctic , 1997 .

[13]  Seymour V. Parter.  Large Scale Scientific Computation. , 1986 .

[14]  S. Caughey,et al.  Observed Characteristics of the Atmospheric Boundary Layer , 1984 .

[15]  Zahari Zlatev,et al.  Computer Treatment of Large Air Pollution Models , 1995 .

[16]  A. Holtslag,et al.  A comparison of boundary layer diffusion schemes in unstable conditions over land , 1995 .

[17]  S. P. S. Arya,et al.  Introduction to micrometeorology , 1988 .

[18]  J. R. Pfafflin,et al.  Advances in environmental science and engineering , 1979 .

[19]  D. Mironov,et al.  A multi-limit formulation for the equilibrium depth of a stably stratified boundary layer , 1996 .

[20]  A. Stohl,et al.  Validation of a Long-Range Trajectory Model Using Gas Balloon Tracks from the Gordon Bennett Cup 95 , 1997 .

[21]  J. Langner,et al.  MATCH - Meso-scale Atmospheric Transport and Chemistry modelling system , 1996 .

[22]  Zahari Zlatev,et al.  Coupling the Advection and the Chemical Parts of Large Air Pollution Models , 1996, PARA.

[23]  A. Holtslag,et al.  Evaluation and model impacts of alternative boundary-layer height formulations , 1996 .

[24]  K Nodop.  ETEX symposium on long-range atmospheric transport, model verification and emergency response 13-16 May 1997, Vienna(Austria) : proceedings , 1997 .

[25]  F. T. M. Nieuwstadt,et al.  Atmospheric Turbulence and Air Pollution Modelling , 1982 .

[26]  Zahari Zlatev,et al.  Using a combination of two models in tracer simulations , 1996 .