air quality monitoring modeling Articles
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Analysis of local concentration gradients in complex built environments: implications for Air Quality Management Areas
This paper reviews the existing guidance on placement of permanent air quality monitoring stations within urban areas and suggests the principles for a new, performance-based guidance. An integrated air quality model has been developed and validated for the designated Air Quality Management Area (AQMA) located in Glasgow City Centre to analyse the importance of local concentration gradients on ...
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IFDM modelling for optimal siting of air quality monitoring stations around five oil refineries
An IFDM modelling study has been conducted to determine the optimal siting of air quality monitoring stations around five oil refineries. The purpose of this immission monitoring network is specified in environmental legislation. The most appropriate output parameter of the IFDM model for this study is the 98th percentile of the moving 24 h averages, P98,m24h. Modelling for the optimal siting of ...
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Near-field geometry effects on urban street canyon measurements for model validation
Selection of numerical urban pollution dispersion models for regulatory purposes entails reliable prior validation against either physical modelling or field measurements. It is shown that an asymmetric geometry of the urban street canyon, in which measurement takes place, induces persistent gradients in pollution dispersion within it, irrespective of the wind vector meandering above the roofs. ...
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Homeland Security: Managing the Risks
Untitled Document Following the terrorist attacks on the World Trade Center in New York City on September 11, 2001, the U.S. Environmental Protection Agency (EPA) and other federal agencies conducted extensive assessments of the air quality and associated environmental and health effects near the so-called “Ground Zero” site. EPA’s activities ...
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Recommendations for the spatial assessment of air quality resulting from the FP6 EU project Air4EU
Air4EU is an FP6 European project with the major aim of providing recommendations on methodologies for the spatial assessment of air quality on local, urban and regional scales. The emphasis is on methodologies that combine monitoring and modelling and on spatial assessment for regulatory purposes, i.e., the EU daughter directives. The recommendations coming from Air4EU are intended as guidance ...
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Report on COST 615 Action "Database, monitoring and modelling of urban air pollution"
COST is a framework for scientific and technical cooperation, allowing the coordination of national research on a European level. It focuses on specific subjects for which there is particular interest in the COST countries. Action 615 concentrated on the physical, chemical and ecological aspects of urban air pollution. It combined activities from 18 European countries. This paper gives an ...
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Practical use of the ISCST3 model to select monitoring site locations for air pollution control
We present an objective methodology for selection of the minimum number of sampling sites required to register the highest concentration values of air pollutants emitted from a continuous point source. The methodology is based on the analysis of 1-hour concentration values above a threshold value estimated by atmospheric dispersion models. The number and location of the air monitoring stations ...
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FTIR gas analyzers support management of fire at UK waste facility - Case study
A multi-agency Air Quality Cell (AQC) was first established in England in 2009 following the Buncefield Oil Storage Depot incident. A review of this event identified the need to rapidly co-ordinate the acquisition, analysis and interpretation of air quality data in major incidents. Arrangements have been made in England to bring together experts from the Environment Agency (EA), Public Health ...
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Multiple sensor fault detection and isolation of an air quality monitoring network using RBF-NLPCA model
This paper presents a data-driven method based on non-linear principal component analysis to detect and isolate multiple sensor faults. The RBF-NLPCA model is obtained by combining a principal curve algorithm and two three-layer radial basis function (RBF) networks. The reconstruction approach for multiple sensors is proposed in the non-linear case and successfully applied for multiple sensor ...
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Combined use of space–borne observations of NO2 and regional CTM model for air quality monitoring in Northern Italy
In this paper SCIAMACHY observations of earth radiance are used to retrieve nitrogen dioxide (NO2) tropospheric column by DOAS spectrometric technique and radiative transfer modelling for AMF computation. These satellite column measurements are then merged with TCAM model simulations, to improve the model output at the ground level. The method used is a weighted rescaling of the model column in ...
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