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Chemical
Characterization of Particles in Winter-Nightime Aerosol Smog in Tokyo
K. Saitoh,
K. Sera, K. Hirano, T. Shirai, Presented at the First Asia Aerosol Conference,
Nagoya, Japan, July 27-29, 1999
Introduction
In wintertime, severe air pollution as aerosol smog due to Suspended
Particulate Matter (SPM: particles with diameter less than 10 um) occurs
frequently in large area of the Kanto Plain including the Tokyo Metropolitan
area, especially the SPM concentration reaches maximum value at nighttime.
The high concentration of SPM is observed at meteorological structure
of calm and stable condition, its detailed meteorological structure analyzed
results have been reported by Mizuno et al. (1990) and Yoshikado (1994).
Reports for chemical composition of SPM have been mostly ions researched
result (Sakamoto et al. (1994, 1998) and Kaneyasu et al. (1999)). Ions
data is important for examination chemical characterization of particles,
in addition to it, element and carbon data and particles form are also
important. Consequently, we have begun to study multi-probe characterization
for particles in aerosol smog. In this paper, we will present a report
on examination of component ratio for carbon, element and secondary-formed
of particles in aerosol smog.
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