dispersion modeling meteorology Articles

  • Meteorological data from numerical weather prediction or observations for dispersion modelling

    Synoptic observations of wind speed, direction, cloud cover, precipitation and temperature are inputs to regulatory dispersion modelling. Numerical Weather Prediction (NWP) data generated by national meteorological services are easily formatted for dispersion models. Changing from observations to NWP data raises concerns amongst regulators and model users – how might impact assessments differ if ...


    By Inderscience Publishers

  • Towards a meteorological pre-processor for dispersion models in an urban environment

    The main results from an extensive observational study in an urban roughness sub-layer are presented and discussed in view of possible applications in the context of meteorological pre-processing for dispersion modelling. These findings mainly concern the turbulence structure, the height variation of Reynolds stress, and the implications for scaling within the upper part of the roughness ...


    By Inderscience Publishers

  • Application of meteorological pre-processor for next generation dispersion models for Hungary

    Research has been started by Hungarian regulatory modellers for the preparation of next generation dispersion models applied in EIA studies. This new generation will require advanced planetary boundary layer parameters in Gaussian plume models. The author investigated the validation of the meteorological pre-processor TRIP for Hungary.Keywords: meteorological pre-, processors, atmospheric ...


    By Inderscience Publishers

  • Simulation of plume dispersion using different stack configurations and meteorological inputs

    The application of CALMET/CALPUFF modelling system is well known, and several validation tests were performed until now; however, most of them were based on experiments with a large compilation of surface and aloft meteorological measurements, not always available. Also, the use of an operational large smokestack as tracer source is not so usual. In this work, CALPUFF model is applied to ...


    By Inderscience Publishers

  • Assessing meteorological uncertainties in dispersion forecasts using a NWP Ensemble Prediction System

    The use of ensembles of meteorological forecasts is explored in the context of dispersion modelling for emergency-response applications such as nuclear accidents or chemical releases. Specification of meteorology is often a major source of uncertainty in dispersion predictions. The ensemble methodology, routinely used in Numerical Weather Prediction (NWP), is followed in which multiple ...


    By Inderscience Publishers

  • Sensitivity of urban dispersion calculations to urban meteorology (COST 715)

    Generally, the worst air pollution occurs in cities. This paper describes the COST 715 programme, which is a European activity supporting scientific exchange and networks on 'meteorology applied to urban air pollution problems'. For urban pollution assessments one needs the input of pollution near the ground, 'averaged' over an area containing a mixture of houses, gardens, streets, etc. The ...


    By Inderscience Publishers

  • Regulatory dispersion modelling in Finland

    We present a review of regulatory atmospheric dispersion models and their application to environmental impact assessment (EIA) in Finland. The following regulatory models are available: the urban dispersion modeling system, models for dispersion of vehicular pollution, the air pollution information system, and the dispersion model for odorous compounds. All of these models are connected to a ...


    By Inderscience Publishers

  • Dispersion models in Greece

    Various dispersion models for passive pollutants, as well as heavy gases, are used in Greece for environmental impact applications. The models are based on degree of complexity, and range from simple Gaussian or box models to CFD approaches. The models are used for environmental impact studies in power installations, chemical facilities and for nuclear emergencies. Reflecting the author's ...


    By Inderscience Publishers

  • Dispersion modelling intercomparison exercise

    In the framework of the "Fifth workshop Harmonisation within atmospheric dispersion modelling for regulatory purposes", a model intercomparison exercise was performed which aimed to assess (i) the environmental impact, and (ii) the compatibility of the performance of similar dispersion models under severe weather and topography conditions. The contributors were asked to use the same ...


    By Inderscience Publishers

  • A dispersion model intercomparison archive

    The paper introduces a formal archive for intercomparison of conventional regulatory dispersion models. It stems from an initial intercomparison, for the UK Environment Agency, of the USEPA's ISC and AERMOD models with the ADMS model, in common use in the UK. The objective is to compare the models directly with one another via standard test cases in order to reveal differences that may arise in ...


    By Inderscience Publishers

  • A meteorological database for next-generation dispersion models, and a Lagrangian particle model based on kinematic simulation theory

    The database system supports small to regional scale air pollution analysis and dispersion modelling. It provides a three-dimensional and time dependent description of relevant meteorological scalar and vector quantities, and also trajectories and meteorological input data for commonly used dispersion models for local and regional applications. The data are visualized on a standard PC with ...


    By Inderscience Publishers

  • Modelling the meteorology and traffic pollutant dispersion in highly complex terrain: the ALPNAP Alpine Space Project

    An integrated methodology was applied, within the framework of the ALPNAP Project, to study the meteorology and traffic pollutant dispersion in highly complex topography, the Frejus Alpine transect area. Three episodes, characterised by strongly critical dispersive conditions, were considered in the year 2004. The atmospheric circulation and pollutant dispersion were simulated using RMS ...


    By Inderscience Publishers

  • A new Russian regulatory dispersion model "MEAN" for calculation of mean annual concentrations and its meteorological pre-processor

    A new Russian regulatory dispersion model "MEAN" is based on integration of the analytical expressions which approximate the numerical solution of the advection-diffusion equation (ADE). The meteorological preprocessor of this model uses routine information from the national meteorological network to estimate and process necessary dispersion parameters. Turbulent fluxes of the sensible ...


    By Inderscience Publishers

  • Meteorological data for dispersion modelling: a brief report on the COST 710 programme on pre-processing and harmonisation

    Dispersion models need reliable meteorological data to run properly. Some of the meteorological data required by dispersion models are not routinely measured and have to be inferred from other measurements. The purpose of this cooperative study under the COST 710 Action is to improve and harmonise the methods of pre-processing the necessary meteorological input data. This should ensure that ...


    By Inderscience Publishers

  • Complex terrain dispersion modelling exercise

    In the framework of the Fourth Workshop, a model inter-comparison exercise is proposed with respect to environmental impact assessment. The purpose of the exercise is to study the compatibility of the performance of similar dispersion models over complex topographies. Contributors were asked to use the same meteorological input over complex terrain topography and to perform dispersion ...


    By Inderscience Publishers

  • Dose projection using dispersion models

    Dose projection is a tool for decision making in the case of a nuclear emergency situation. In this work the dose projection software developed for the Krsko NPP located in Slovenia is described. This software can be used for a quick emergency evaluation in the case of a hypothetical pressurised water reactor accident, and for emergency exercises. The software was developed to estimate reactor ...


    By Inderscience Publishers

  • Quality assurance and improvement of micro-scale meteorological models

    Models have begun to play an important role in environmental assessment and urban climate studies. Their increasing use, however, is paralleled by a growing awareness that the majority of these models have never been the subject of rigorous evaluation. Consequently there is a lack of confidence in the modelled results. The paper reports on a European initiative (COST 732) which was launched 2005 ...


    By Inderscience Publishers

  • Understanding and Adapting to New Dispersion Models

    The U.S. Environmental Protection Agency (EPA) has proposed revisions to its air dispersion modeling guidance1 (“Guideline on Air Quality Models”, or simply “Guideline”), found in 40 CFR 51 Appendix W.2 These revisions, once finalized, will create significant changes in the way that air quality analyses are performed in the US, and perhaps the most significant changes since the Guideline was ...


    By Trinity Consultants

  • Simulations of the dispersion from a waste incinerator in the Turin area in three different meteorological scenarios

    A numerical modelling study for the assessment of the air quality impact of a waste incinerator to be built in the city of Turin is presented, aimed at evaluating the ground level concentration distribution during adverse dispersion conditions, causing severe pollution episodes. The pollutant impact of the incinerator is evaluated with the three-dimensional modelling system RMS. This class of ...


    By Inderscience Publishers

  • Sensitivity of CTM simulations to meteorological input

    The objective of this work is to investigate the sensitivity of an Eulerian Chemical Tranport Model to the reconstruction of the wind field. In the framework of City-Delta exercise, three 14-day simulations have been performed, using the same model (CAMx) and different meteorological inputs; these were built combining large-scale analysis, local observations and the output of a high resolution ...


    By Inderscience Publishers

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