title: Trends in motor-vehicle related air pollutants in central London.
abstract: Results of intermittent monitoring of six aromatic hydrocarbons (benzene, toluene, ethyl-benzene, m-xylene, p-xylene and o-xylene), carbon monoxide and oxides of nitrogen over a thirteen year period at a site in central London (Exhibition Road) are presented. Four monitoring regimes were undertaken; namely, 1979, 1982/83, 1986/87 and 1991/92. The summertime daytime mean ambient concentrations of the measured parameters at this site are presented. The reported concentrations show a reduction from 1979 to 1992 by approximately a factor of two, despite national increases in motor fuel consumption and the volume of traffic. Relevant European Community legislation covering emissions from motor-vehicles are outlined and comparisons are made with emissions from motor vehicles predicted from the UK national inventory. The importance of the frequency of measurements was also noted.
authors.affiliation: Atmospheric Measurements and Processes, Culham Laboratory, AEA Technology, NETCEN, Culham, OX14 3DB, Abingdon, Oxfordshire, UK.
authors.forename: R A
authors.initials: RA
authors.lastname: Field
authors.forename: J R
authors.initials: JR
authors.lastname: Brown
authors.forename: M E
authors.initials: ME
authors.lastname: Goldstone
authors.forename: J N
authors.initials: JN
authors.lastname: Lester
authors.forename: R
authors.initials: R
authors.lastname: Perry