Measured reduction of kerbside ultrafine particle number concentrations in Copenhagen |
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| Authors: | Peter Wåhlin |
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| Institution: | 1. US Environmental Protection Agency, Office of Research and Development (E343-04), Research Triangle Park, NC 27711, USA;2. Universite d’Orleans, Faculté des Sciences, 1 Rue de Chartres, 45067 Orléans, France;3. ARCADIS US, Inc. 4915 Prospectus Drive, Durham, NC 27713, USA;1. Embrapa Genetic Resources and Biotechnology, Parque Estação Biológica, W5 Norte, P.O. Box 02372, Brasília, DF, 70770-917, Brazil;2. Department of Entomology, University of Minnesota, 219 Hodson Hall, 1980 Folwell Ave., St. Paul, MN, 55108, USA;1. Institute for Environmental Studies, Faculty of Science, Charles University in Prague, Albertov 6, 12843 Prague 2, Czech Republic;2. Center for Air Resources Engineering and Science, Clarkson University, Box 5708, Potsdam, NY 13699-5708, USA;3. Institute of Analytical Chemistry of the Academy of Science of the Czech Republic, v. v. i., Veve?í 967/97, 60200 Brno, Czech Republic;1. Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi, India;2. National Centre for Medium Range Weather Forecasting, Noida, India;3. Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi, India;4. DST-Mahamana Centre of Excellence in Climate Change Research, Banaras Hindu University, Varanasi, India;1. Norwegian Institute for Air Research (NILU) at FRAM – High North Research Centre on Climate and the Environment, NO-9296 Tromsø, Norway;2. Department of Community Medicine, UiT, The Arctic University of Norway, 9037 Tromsø, Norway;3. Department of Chemistry, University of Florence, Via della Lastruccia, 3, 50019 Sesto Fiorentino, Florence, Italy;4. European Commission, Joint Research Centre, Institute for Health and Consumer Protection (IHCP), Chemical Assessment and Testing Unit, Via E. Fermi 1, I-21020 Ispra (VA), Italy |
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| Abstract: | The average particle number concentration kerbside at a busy street in Copenhagen has been reduced by 27% from the period 2002–2004 to the period 2005–2007. The reduction is in the ultrafine particle range (<100 nm). Strong evidence indicates that a significant part of the reduction, especially in the size range <30 nm, is due to the transition to sulphur-free (<10 ppm) diesel fuel and petrol in Denmark at New Year 2005. |
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