air emissions modeling Articles
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NO x emission model of turbofan engine
During last decade a lot of investigations also focused on the evaluation of aircraft engine impact on local and regional air quality in the vicinity of the airport. The emission inventory of aircraft engines are usually calculated on the basis of certificated emission indexes, which is provided by the engine manufacturer and reported in the database of ICAO. The certificated emission indices ...
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The role of temperature in tropospheric ozone
After evaluating some meteorological simulations, we detect an error of over 5°C in surface temperature. In order to assess the effect of this anomaly in temperature, we perform new simulations of an emission model and a photochemical model using the correct surface temperature in the meteorological data. Our goal is not to solve the problem in surface temperature estimates, but to reveal how it ...
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Study of regional dilution and transformation processes of the air pollution from road transport
The objective of this work is to study in detail the dilution processes of the plumes and the chemical transformations of pollutants generated by road transport. The numerical simulations are carried out using the MODELS-3 nesting abilities, downscaling to a horizontal resolution of 10 km, the innermost domain including a region with very intensive road transport – the city of London and its ...
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A project "Transformation of air-pollution, modelling its transport and dispersion"
Information about a new project is given in this contribution. The project is financed by the Czech Ministry of Environment and deals with the problem of summer photochemical smog formation. Field campaigns and utilisation of existing monitoring network data are supposed for analysing both biogenic emissions and emissions due to human activity. An important part of this project consists in ...
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The Air Quality Management Decision Support System (AQMDSS) for Beijing, People's Republic of China
The People's Republic of China (PRC) has been experiencing rapid economic and industrial growth with associated increased air pollution. Government officials strive to improve air quality while maintaining growth. Implemented control measures have not achieved air quality goals; therefore, the Beijing Municipal Environmental Protection Bureau turned to air quality models to help identify sources ...
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Estimation of NO
xconcentrations for an urban street canyon in IrelandTwo urban street canyon models, STREET and OSPM, were investigated at Pearse Street, in the centre of Dublin City. Both STREET and OSPM is semi–empirical model that calculates series of hourly concentrations at different receptor locations within a street canyon. From the assessment carried out, for the STREET model, the value of the site specific constant parameter K with a value of 7 gave ...
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A linear programming approach to evaluate economic instruments for intra-firm SPM emissions reduction trading within M/s Tata Steel, Jamshedpur
A linear programming model is developed to calculate optimum SPM abatements at different emitting sources of M/s Tata Steel to achieve the abatement limits for the environmental bubble with least cost. An environmental bubble with its limit equal to the sum of permitted SPM emissions at all the emitting sources of M/s Tata Steel is considered. The optimum SPM abatements at different emitting ...
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A congestion sensitive approach to modelling road networks for air quality management
This research establishes an approach to modelling a congested road network for air quality management, which enables the assessment of traffic management solutions that may create only subtle changes in the traffic flow regimes. Road network emissions have been calculated using standard factors taking into account details of vehicle fleet composition, average speeds and road type. Additionally, ...
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Traffic pollution modelling in a complex urban street
This study explores for the first time, the applicability of the Danish Operational Street Pollution Model (OSPM) in the city of Buenos Aires where street canyons are very irregular. The model is applied in an irregular and asymmetric street canyon of a five–lane avenue near a street intersection. Urban background concentrations estimated by the DAUMOD model are considered. Meteorological ...
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A mesoscale study of the impact of industrial emissions by using the MM5-CMAQ modelling system
The scientific interest in improving the air quality tools that provide a detailed description – source oriented – of atmospheric processes and the impact of specific large industrial emission points is growing. This paper describes the results of using a state-of-the-art third-generation air quality modelling system (MM5-CMAQ) over a pilot test industrial site in the Madrid mesoscale domain. The ...
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Long-term simulations of particulate matter in Europe on different scales using sequential nesting of a regional model
A regional model system for the simulation of air quality in Europe (EURAD) has been employed for long-term calculations of atmospheric pollutants on different scales. The model allows sequential nesting. Starting with a domain covering most of Europe, the nesting procedure was used to scale down the simulations to a highly populated and industrialized area, namely NorthRhine-Westphalia (NRW). ...
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Application of The Air Pollution Model (TAPM) to the urban airshed of Bangkok, Thailand
Bangkok has been faced with air pollution problems as a result of increasing traffic emissions. The Air Pollution Model (TAPM) was employed to simulate carbon monoxide (CO) concentrations based on an emissions inventory data. The hourly CO concentrations from a year-long simulation have been evaluated against observations from six monitoring sites. The simulated concentrations were evaluated ...
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Comparison of model predictions and measurements near a major road in an urban area
We have compared measured concentration data with predictions from a dispersion modelling system. The measurement campaign was conducted near a major road in the Helsinki Metropolitan area during two months of 1994. The concentrations of five gaseous pollutants (NO, NO2, O3, CO and SO2) were measured at three heights, together with the simultaneous measurement of traffic densities and the ...
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Integrated gasification combined cycle (IGCC) air permitting: overcoming obstacles, maximizing flexibility, presented at EUEC 2010
Agenda 1.IGCC Process Overview Gasification system options and process flow diagram Process area and plant-wide air emissions summary 2.Gasification Block Sources Emission points and operating scenarios (OS) Short-term and annual emissions summary 3.Permitting and Compliance Strategies Permitting considerations for startup, shutdown, gasifier rotations, and malfunctions (SSM) ...
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Air quality assessment in the EU: room for improvement?
Different modelling approaches are used to design and assess air quality plans across Europe. This study assessed the strengths and weaknesses of these different approaches. The researchers conclude that a large variety of models is in use, without a preferred or standard model having emerged yet. They identify integrating local-scale and large-scale models and verifying models with measurements ...
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GHG regulation under the clean air act – recent developments
EPA’s GHG Tailoring Rule and Senate Action On October 27, 2009, EPA published the Prevention of Significant Deterioration (PSD) and Title V Greenhouse Gas (GHG) Tailoring Rule in the Federal Register, followed by a 60-day public comment period that ended on December 28, 2009. The proposed rule represents EPA’s effort to decrease the number of sources subject to major source permitting ...
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Utilisation and integration of interdisciplinary computer models into a tool for analysing ozone production from transportation sources
High ozone levels detected over large inland areas in Israel triggered an analysis of air mass back-trajectory, which pointed to the coastal Tel-Aviv metropolitan transportation system as the origin of the ozone's precursors. In order to link the transportation emissions to ozone formation, interdisciplinary modelling systems were utilised and integrated. The transportation-to-ozone formation ...
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Dispersion modelling near tunnel exits: simulation and measurements
Measurements of car exhaust gases were made in May/June 1995 in the vicinity of the Bielefeld tunnel. CO and NOx from car exhausts were measured to allow comparison with a model simulation. Ozone was also measured. These measurements were made using commercial continuous analysers. A valve control system was used to investigate the dispersion of the trace gases. This allowed measurements at ...
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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 ...
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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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