Dispersion of traffic-related exhaust particles near the Berlin urban motorway

8789 7 32967 2 70654 document 32967 acp-9-2355-2009.pdf application/pdf 0d43d86d5a599724e15035cdf705d2ec MD5 5868237 2016-02-19 12:22:26 https://pure.iiasa.ac.at/id/eprint/8789/1/acp-9-2355-2009.pdf 8789 1 1 application/pdf text en public

acp-9-2355-2009.pdf

published 32968 2 70658 document 32968 lightbox.jpg image/png d01d21edee4d495c4aad529cea0820ed MD5 60671 2016-02-19 12:22:48 https://pure.iiasa.ac.at/id/eprint/8789/2/lightbox.jpg 8789 2 2 image/png other Thumbnails conversion from text to thumbnail_lightbox en public

lightbox.jpg

preview.jpg

medium.jpg

small.jpg

indexcodes.txt

http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/32967 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/32967 http://eprints.org/relation/isIndexCodesVersionOf https://pure.iiasa.ac.at/id/document/32967 archive 351 disk0/00/00/87/89 2016-01-15 08:41:51 2021-08-27 17:20:36 2016-01-15 08:41:51 article show 1 Birmili W. Alaviippola B. Hinneburg D. Knoth O. Tuch T. Borken-Kleefeld J. 1888 0000-0002-5465-8559 Schacht A. Dispersion of traffic-related exhaust particles near the Berlin urban motorway - Estimation of fleet emission factors pub iis_env prog_apd Atmospheric particle number size distributions of airborne particles (diameter range 10-500 nm) were collected over ten weeks at three sites in the vicinity of the A100 urban motorway in Berlin, Germany. The A100 carries about 180000 vehicles on a weekday. The roadside particle distributions showed a number maximum between 20nm and 60nm clearly related to the motorway emissions. The average total number concentration at roadside was 28000 per cubic cm with a total range of 1200-168000 per cubic cm. At distances of 80 and 400 m from the motorway the concentrations decreased to mean levels of 11000 and 9000 per cubic cm, respectively. An obstacle-resolving dispersion model was applied to simulate the 3-D flow field and traffic tracer transport in the urban environment around the motorway. By inverse modelling, vehicle emission factors were derived that are representative of a fleet with a relative share of 6% lorry-like vehicles, and driving at a speed of 80 km/h. Three different calculation approaches were compared, which differ in the choice of the experimental winds driving the flow simulation. The average emission factor per vehicle was 2.1 (plus/minus 0.2) x 10^(14) per km for particle number and 0.077 (plus/minus 0.01) x 10^(14) cubic cm per km for particle volume. Regression analysis suggested that lorry-like vehicles emit 123 (plus/minus 28) times more particle number than passenger car-like vehicles, and lorry-like vehicles account for about 91% of particulate number emissions on weekdays. Our work highlights the increasing applicability of 3-D flow models in urban microscale environments and their usefulness for determining traffic emission factors. 2009-04 published European Geosciences Union (EGU) 10.5194/acp-9-2355-2009 XJ-09-139 Atmospheric Chemistry and Physics; 9(7):2355-2374 (2 April 2009) <www.atmos-chem-phys.net/9/2355/2009> 36 public Atmospheric Chemistry and Physics 9 7 2355-2374 TRUE 1680-7324 FALSE info:eu-repo/semantics/article