Author(s)

R.C. Mann and R.S. Sokhi

Abstract

A high resolution atmospheric emissions inventory for road vehicle sources and the factors influencing its accuracy and sensitivity R C Mann and R S Sokhi Atmospheric Science Research Group (ASRG), Department of Environmental Sciences, University of Hertfordshire, College Lane, Hatfield, Hertfordshire, AL10 9AB, UK EMail: r. s. sokhi@herts. ac. uk Abstract This paper discusses the factors that need to be considered when developing a high resolution 1x1 km emissions inventory and describes their application to a 625 km* area within Hertfordshire, UK. The emissions of CO and NOx from motor vehicles are estimated by 5 classes of vehicle and 5 different road types. An assessment is made of the proportions of emissions within urban and rural areas together with those created by cold starts. Trends in emissions for the years 2000 and 2005 are estimated The high levels of CO emissions from urban driving and cold starts are identified and the level of reductions achievable fr

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