10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Pollutant Measurements at Near Road and Background Sites
OLIVER RATTIGAN, H. Dirk Felton, Brian P. Frank, New York State Dept. of Environmental Conservation
Abstract Number: 61 Working Group: Aerosol Chemistry
Abstract Public concern about the heightened exposure to near-roadway (NR) pollutants had led to a national near-roadway air monitoring program. In New York State monitoring has been ongoing at three urban NR locations. Pollutants measured at these sites include PM2.5 mass, Nitrogen Oxides (NO, NO2, NOx), Ultrafine Particles, Black Carbon (BC) and CO. Measurements at NR sites are usually made in conjunction with existing urban background sites. In general, pollutant concentrations are elevated at the near road site compared to the background site particularly during the daytime hours. At Rochester for example BC at the near roadway site is elevated by a factor of 2.0-3.0 between 7AM and 3 PM dropping to near uniform concentrations at night. The enhancement in BC is highest in summer and lowest in winter. Other co-pollutants including NOx, CO and PM2.5 mass are also elevated at the NR site by varying degrees during daytime hours. The data are used to determine diurnal, weekday/weekend and seasonal patterns. Pollutant source direction is determined through nonparametric wind regression. The data will be used to determine compliance with National Ambient Air Quality Standards.