Academic Journals Database
Disseminating quality controlled scientific knowledge

Deriving turbulence characteristics from the COSMO numerical weather prediction model for dispersion applications

ADD TO MY LIST
 
Author(s): B. Szintai | P. Kaufmann | M. W. Rotach

Journal: Advances in Science and Research
ISSN 1992-0628

Volume: 3;
Start page: 79;
Date: 2009;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

ABSTRACT
At MeteoSwiss an integrated modelling system is used to simulate the dispersion of radioactive material in emergency situations. For the prediction of the atmospheric flow, the COSMO numerical weather prediction model is used. The model is run operationally at 6.6 and 2.2 km horizontal resolution, respectively and uses a 1.5 order turbulence closure with a prognostic equation for turbulent kinetic energy. Both versions of the COSMO model are coupled off-line with a Lagrangian particle dispersion model (LPDM). The aim of this study is to investigate the sensitivity of the dispersion model to different interfacing approaches between LPDM and the COSMO model. The diagnosed turbulence variables are validated on an ideal convective case and two measurement campaigns. Simulations of hypothetical pollutant releases show that the different interfacing approaches can lead to substantial changes in the forecasted concentrations.

Tango Rapperswil
Tango Rapperswil

    
RPA Switzerland

RPA Switzerland

Robotic process automation