Abstract
Abstract. Jet engine aircraft are ubiquitous and significant sources of
atmospheric nanoparticles. Using size-resolved particulate samples collected
near a runway of the Narita International Airport, Japan, we clearly
demonstrate that organic compounds in the ambient nanoparticles (diameters:
< 30 nm) were dominated by nearly intact forms of jet engine
lubrication oil. This finding provides direct evidence for the importance of
unburned lubrication oil as a source of aircraft exhaust nanoparticles and
also has an implication for their environmental impacts near airports and in
the upper troposphere.
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