title: Ultrafine particle size as a tracer for aircraft turbine emissions.
abstract: Ultrafine particle number (UFPN) and size distributions, black carbon, and nitrogen dioxide concentrations were measured downwind of two of the busiest airports in the world, Los Angeles International Airport (LAX) and Hartsfield-Jackson International Airport (ATL - Atlanta, GA) using a mobile monitoring platform. Transects were located between 5 km and 10 km from the ATL and LAX airports. In addition, measurements were taken at 43 additional urban neighborhood locations in each city and on freeways. We found a 3-5 fold increase in UFPN concentrations in transects under the landing approach path to both airports relative to surrounding urban areas with similar ground traffic characteristics. The latter UFPN concentrations measured were distinct in size distributional properties from both freeways and across urban neighborhoods, clearly indicating different sources. Elevated concentrations of Black Carbon (BC) and NO2were also observed on airport transects, and the corresponding pattern of elevated BC was consistent with the observed excess UFPN concentrations relative to other urban locations.
authors: University of Washington Department of Environmental and Occupational Health Sciences, Box 357234, Seattle, WA, 98198. +1 (206) 543-3222.
authors: Erin A
authors: EA
authors: Riley
authors: University of Washington Department of Civil & Environmental Engineering, Box 352700 Seattle, WA, 98198. +1 (206) 543-6815.
authors: Timothy
authors: T
authors: Gould
authors: University of Washington Department of Environmental and Occupational Health Sciences, Box 357234, Seattle, WA, 98198. +1 (206) 543-3222.
authors: Kris
authors: K
authors: Hartin
authors: University of Southern California, Keck School of Medicine. SSB 225F, MC 9237, 2001 N Soto Street, Los Angeles, CA 90032. +1 (323) 442-2870.
authors: Scott A
authors: SA
authors: Fruin
authors: University of Washington Department of Environmental and Occupational Health Sciences, Box 357234, Seattle, WA, 98198. +1 (206) 543-3222.
authors: Christopher D
authors: CD
authors: Simpson
authors: University of Washington Department of Environmental and Occupational Health Sciences, Box 357234, Seattle, WA, 98198. +1 (206) 543-3222.
authors: Michael G
authors: MG
authors: Yost
authors: University of Washington Department of Civil & Environmental Engineering, Box 352700 Seattle, WA, 98198. +1 (206) 543-6815.
authors: Timothy
authors: T
authors: Larson
keywords: airport emissions; black carbon; mobile monitoring; nitrogen dioxide; ultrafine particle size; ultrafine particles