Exposure To Ultrafine Particles From Traffic In
City Streets And The Urban Atmosphere
Author(s)
I.D. Longley, J.R. Dorsey, M.W. Gallagher, J.D. Allen,
M.R. Alfarra & H. Coe
Abstract
Mass-based emission controls (such as Euro – I to IV) are successfully reducing
emissions of fine particles from road vehicles, but may have actually increased
the emission of ultrafine particles and their persistence in the atmosphere just at a
time when growing evidence indicates that these ultrafine particles present the
greatest threat to health upon inhalation. These particles have so little mass that
they barely register in measurements made by the current urban air quality
monitoring network, which measures the mass of particulate matter (PM10).
Ultrafine particles also have different dynamic and transport properties to larger
particles, leading to more variability in concentrations that may rise and fall
inde
Keywords
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