meteorology model Articles
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Evaluation and sensitivity tests of MEMO using the ESCOMPTE pre-campaign dataset
The prognostic mesoscale meteorological model MEMO is applied to the Greater Marseille Area (GMA) and an extensive evaluation is carried out on the basis of the ESCOMPTE pre-campaign dataset. A series of tests are performed regarding the sensitivity of the model to grid resolution and the surface and soil parameters being used.Keywords: mesoscale meteorological modelling, sensitivity test, ...
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The COST 732 Best Practice Guideline for CFD simulation of flows in the urban environment: a summary
This paper is a summary of the "Best Practice Guideline" (BPG) document (Franke et al., 2007) produced in the framework of the European COST Action 732 "Quality assurance and improvement of micro-scale meteorological models", available from the site given in the reference section. The full document provides guidelines for undertaking simulations that are used to evaluate micro-scale ...
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Application of MM5 model in the northwest area of Greece using a four-nest procedure
MM5 is a meteorological modelling system characterised by multiple nesting capability, nonhydrostatic dynamics, four-dimensional data assimilation capability as well as enhanced physical parameterisation options combined with portability to a wide range of computing platforms. MM5 has been applied in many cases across the world. The modelling system, using four nests, was applied for the first ...
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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 ...
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An analysis of the meteorological and air quality conditions during an extreme ozone episode over the north-eastern USA
In this study, an extreme ozone episode that occurred during the period 12-15 July 1995 over the north-eastern United States is investigated through model simulations. This paper is focused on the meteorological conditions prevailing during this ozone episode. The analysis is based on nested grid simulations performed with the meteorological model CSU-RAMS (Colorado State University - Regional ...
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COST 732 in practice: the MUST model evaluation exercise
The aim of this paper is to describe the use of a general methodology tailored to the evaluation of micro-scale meteorological models applied to flow and dispersion simulations in urban areas. This methodology, developed within COST 732, has been tested through a large modelling exercise involving many groups across Europe. The major test case used is the Mock Urban Setting Test (MUST) experiment ...
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Modelling of atmospheric pollutant dispersion in coastal areas
Some characteristics of air pollution in Tarragona (Spain) were investigated. Tarragona has an important petrochemical industry in a coastal region with a complex terrain. The study was made numerically in sea breeze conditions with a three-dimensional mesoscale meteorological model. The temporal and spatial variations of the wind fields have been used in the Lagrangian equation for a ...
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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 ...
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Particulate matter pollution simulations in complex terrain
The preliminary results of a simulation of the air quality in a region of Northern Italy are presented. The simulation was performed using a modelling system based on a meteorological model, an interface code and a transport–chemistry model. Comparisons with measured data are presented and discussed. Keywords: PM pollution, air quality, transport–chemistry modelling, dispersion ...
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Meteorological simulations with use of satellite data for assessing urban heat island under summertime anticyclonic conditions
The aim of this study was to investigate the formation, evolution and evaluation of topography effects on the urban heat island over the city of Zagreb. For this purpose, the non-hydrostatic mesoscale meteorological model MEMO was used and high-resolution simulations were carried out for two summertime anticyclonic periods. Satellite data were used to improve the model's performance. The ...
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New improvements on the OPANA model by using World Wide Web resources
In recent years, an extraordinary interest has grown within the scientific community to improve the operational versions of complex mesoscale urban and regional models. One of the most important limitations of the operational versions of such types of models are found in the convenient updating of boundary conditions for sufficiently long forecasting periods. Downloading boundary conditions from ...
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Towards a model evaluation protocol for urban scale flow and dispersion models
This paper reports on the stages forming a model evaluation protocol for urban flow and dispersion models proposed within the COST Action 732 on "Quality Assurance and Improvement of Micro–Scale Meteorological Models". It discusses the different components forming model evaluation with emphasis on validation and implementation of the protocol for the test case Mock Urban Setting Test (MUST). The ...
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Application to Northern Italy of a new modelling system for air quality planning: a comparison between different chemical mechanisms
A modelling system has been developed for the analysis of photochemical pollution. It is composed of three modules: CALMET meteorological model, POEM-PM emission model and TCAM model. The system can accommodate chemical schemes based on both lumped molecule and lumped structure approaches. Application to an intense ozone production episode occurred in northern Italy has been performed. The ...
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Validation of a mesoscale meteorological simulation over Po Valley
Very high secondary pollution concentrations often occur in Northern Italy, due to the density of anthropogenic emissions and frequent stagnant meteorological conditions that characterise the area. In such a situation it is important to use Chemical Transport Models (CTMs), to properly describe phenomena bringing to pollution formation and accumulation. Meteorological models are one of the ...
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Effects of nocturnal thermal circulation and boundary layer structure on pollutant dispersion in complex terrain areas: a case study
For air quality models, it is important that the meteorological fields derived from meteorological models reflect the best characterisation of the atmosphere. Under strongly thermally–stratified conditions, the determining factors are turbulent kinetic energy and surface layer parameterisations. In this study, the 5th generation Mesoscale Model (MM5) and the Weather Research and Forecasting ...
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Effect of different meteorological fields on the regional air quality modelling over Pearl River Delta, China
This study evaluates the performances of three Community Multiscale Air Quality (CMAQ) model v5.0 simulations that utilise meteorological input data from the 5th-generation Mesoscale Model (MM5), the Weather Research and Forecasting (WRF) model and WRF with Four-Dimensional Data Assimilation (WRF/FDDA). Three sets of CMAQ model simulations were performed for a high air pollution episode from ...
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Modelling different meteorological situations in Catalunya, Spain, with MM5 and TAPM mesoscale models: a comparative study
Meteorological simulations have been performed with two different mesoscale models: MM5 (PSU/NCAR-USA) and TAPM (CSIRO-Australia). Both models have been run under two different meteorological situations, typical for summertime and wintertime, allowing the models to be tested under different synoptic forcings. The study region for these mesoscale simulations is located in the interior of ...
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Estimate of potentially high ozone concentration areas in the centre of the Iberian Peninsula
This paper presents a study to determine the areas that could most probably be affected by high ozone levels in the centre of the Iberian Peninsula. Considering the years 1992 and 1995, cluster analysis was applied to some variables to group those days with similar meteorological states. Three different meteorological cluster groups were identified and their main features analysed. Additionally, ...
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Air pollution forecast in Portugal: a demand from the new air quality framework directive
This work aims at developing and validating a numerical air quality operational forecasting system that will be applied over Portugal. The CHIMERE model was chosen for the chemistry-transport simulation using the meteorological parameters supplied by the MM5 mesoscale meteorological model, forced by the AVN/NCEP global forecasts. An experiment of 48-hour real-time forecast simulations was ...
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WRPLOT View - Comparing Wind Roses
Wind roses are used to graphically depict wind frequency. Directly comparing wind roses from two different sets of meteorological data is a great way to compare how similar the data is. This is commonly done when comparing observational data to that generated with a meteorological model such as WRF or MM5. Lakes Software’s WRPLOT View freeware application has long been a favorite tool of ...
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