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8 The likely health and environmental implications associated with atmospheric 9 nanoparticles have prompted considerable recent research activity. Knowledge of the 10 characteristics of these particles has improved considerably due to an ever growing interest in 11 the scientific community, though not yet sufficient to enable regulatory decision making on(More)
Freshly emitted nanoparticles were found in the car cabin High frequency measurements are needed for better PNC estimation Dilution was found to be the dominant process in car cabin PNC levels in car cabin increased significantly in traffic congestion zones Exposure doses to temporal PNC peaks were up to 380% more than average dose rate. Abstract 8 The aim(More)
Currently, there are no air quality regulations in force in any part of the world to control number concentrations of airborne atmospheric nano-particles (ANPs). This is partly due to a lack of reliable information on measurement methods, dispersion characteristics, modelling, health and other environmental impacts. Because of the special characteristics of(More)
13 Recent Euro–5 and Euro–6 vehicle emission standards are the first ever initiative to 14 control particles on a number basis at the source. Related standards are also desirable 15 for ambient nanoparticles (taken in this article to be those below 300 nm) to protect 16 against possible adverse impacts on public health and the environment. However, 17 there(More)
13 The transport sector is the dominant source of nanoparticles in the urban atmosphere. 14 It is also responsible for about 20–25% of current global CO 2 emissions, a figure that 15 is expected to grow to about 30–50% by 2050 (Fuglestvedt et al., 2008). One option 16 to counter this trend and contribute to the attainment of carbon emission reduction 17(More)
In this experimental work both qualitative (flow visualisation) and quantitative (laser Doppler anemometry) methods were applied in a wind tunnel in order to describe the complex 3-dimensional flow field in a real environment (a street canyon intersection). The main aim was an examination of the mean flow, turbulence and flow pathlines characterising a(More)
This study compared dispersion calculations using a street network model (SIR-ANE) with results from wind tunnel experiments in order to examine model performance in simulating short-range pollutant dispersion in urban areas. The comparison was performed using a range of methodologies, from simple graphical comparisons (e.g. scatter plots) to more advanced(More)
Understanding the transformation of nanoparticles emitted from vehicles is essential for developing appropriate methods for treating fine scale particle dynamics in dispersion models. This article provides an overview of significant research work relevant to modelling the dispersion of pollutants, especially nanoparticles, in the wake of vehicles.(More)
In the present paper we have analysed experimentally (wind tunnel) and numerically (CFD) the impact of some morphological parameters on the flow within and above the urban canopy. In particular, this study is a first attempt in systematically studying the flow in and above urban canopies using simplified, yet more realistic than a simple array of cuboids,(More)