Abstract
Daily averaged PM2.5 was measured using an FRM sampler from April 2003 to March 2007 at an urban site in Nagoya city. Annual-average PM2.5 concentration ranged from 23 to 26 μg/m3 while 98% tile concentration ranged from 52 to 60 μg/m3. The chemical composition of PM2.5 was measured from April 2006 to March 2007. These data were analyzed using positive matrix factorization (PMF). Seven sources were identified: sulfate-rich secondary aerosol (39%), nitrate-rich secondary aerosol (17%), diesel emissions (18%), non-combustion organic carbon (10%), falling temperatures (9%), incinerators (4%), and sea salt (1%).
