title: Estimations of real-world N2O emissions from road vehicles by means of measurements in a traffic tunnel.
abstract: Ambient air measurements of N2O, NOx, CO, and HC based on grab sampling were conducted in a major traffic tunnel in Sweden, that carries up to 4,000 vehicles per hour, in order to estimate real-world emissions of N2O for road traffic. Two different methods--relative and mass balance-were used to calculate a N2O emission factor for the mixed vehicle fleet, which gave an average emission factor, at average speeds of 30-70 km/h, of approximately 25 mg N2O/ km, with a range of 7-56 mg/km.
authors.affiliation: Swedish Environmental Research Institute (IVL), Göteborg, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Sjödin
authors.forename: D A
authors.initials: DA
authors.lastname: Cooper
authors.forename: K
authors.initials: K
authors.lastname: Andréasson
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000592:standards; D018986:Motor Vehicles; D009609:Nitrous Oxide / Q000032:analysis*; D015203:Reproducibility of Results; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions; D009609:Nitrous Oxide