International Atomic Energy Agency pursues MODARIA programme for the second triennial. The programme tests new research achievements in the field of environment and human protection related to atomic energy utilisation. The programme activities are pursued in several working groups. MEIS company suggested use and validation of weather forecasts for tracing of the cloud of radionucleids from power plant to nearby human settlements in the working group named Exposures in contaminated urban environments and effect of remedial measures. The suggested novelty was accepted and MEIS company has been put in charge to one of tasks in working group no. 2 (WG2). Three-year task has been started with a benchmark case study, namely Šoštanj pollution-measurements database. It was shown on the benchmark how weather forecasts are used for modelling of pollution dispersion in the air.
B.04 Guest lecture
COBISS.SI-ID: 30959399This was the second presentation of MEIS company held at International Atomic Energy Agency in the frame of MODARIA II programme. The aim was to determine the qualitative and quantitative methods that will enable validation of weather forecast modelling results with the abundant measured data from the Šoštanj database (a historical data base of air pollution tracer experiment in Šoštanj, Slovenia). The validation methods are different from those used in other fields of meteorology, because of specific problems related to air pollution modelling. These questions and methods are among important ones in this project. Feedback from top researchers in this specific field of environmental nuclear safety is very valuable for our further work.
B.04 Guest lecture
COBISS.SI-ID: 30959143Vertical temperature profile over very complex terrain as input in a dispersion modelling system – NWP modelling using WRF and validation with RASS and traditional high tower; B 03 Description: For high quality modelling of air pollution dispersion over a very complex terrain validations of the input forecasted meteorological quantities are necessary. Measurements using the RASS are of exceptional values for this purpose. Modelling the pollution dispersion in the atmosphere in the immediate vicinity of industrial sources over a complex terrain requires good meteorological input data on the state of the atmosphere. If we do not have these, it is difficult to obtain results which would be a good match with the measured concentrations in space and time in fine resolution over a complex terrain. At the current state of modelling science, such matching is a prerequisite for serious work and is reasonably required by industrial clients. In the presentation, we will shed light on one of the most important components of the input meteorological data – a vertical temperature profile of the atmosphere. For a location in a semi-closed basin over an extremely complex terrain in Slovenia we provide a longer series of measurements of the temperature profile of the atmosphere with traditional measurements on a 70-metre high tower, measurements with a RASS, which usually extends a few hundred metres above the level of the basin and NWP results of the WRF model, with the GFS input prognostic global data, in different local resolutions. The results of the measurements are available for point sensors in the form of a time series of half-hourly average values. We also have half-hourly average values for 24 vertical levels for the RASS. The WRF model operates in two local resolutions for the validation area. We will validate the forecast for the current day in half-hour increments.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 30851367