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Article
The Relationship between Major Components of PM2.5 and Meteorological Factors in Urban Tokyo, Japan
Author(s)
Ping Li1, 2 and Hideo Hasegawa1
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DOI:10.17265/2162-5263/2017.01.003
Affiliation(s)
1. Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
2. College of Chemistry and Chemical Engineering, Qiqihaer University, No.42 Wenhua Street, Qiqihar 161006, China
ABSTRACT
In this research, the main purpose is to estimate the
variation of PM2.5 mass concentration and study the influence of meteorological
characteristics on major components of PM2.5 concentrations in urban Tokyo, Japan. The
results shown that the annual mean mass concentration of PM2.5 in urban Tokyo was higher than JEQS (Japanese
Environmental Quality Standard) of the MOEJ (Ministry of the Environment Japan) (15 μg/m3), and 41.1% of the daily PM2.5 mass concentration exceeded the annual JEQS concentration during observation period. The major components of PM2.5 including SO42−,
NO3−, NH4+, OC and EC were tightly related to
the meteorological conditions, the
correlations results shown that the wind speed and relative humidity had significant correlations with major components of PM2.5 than the other meteorological factors.
Higher relative humidity,
windless and less rainfall conditions were
favorable for elimination of PM2.5 concentration. Higher temperature was beneficial to the formation of SO42-, but higher temperature and stronger sunshine
duration were not conducive to the formation of NO3-.
KEYWORDS
PM2.5, major components, meteorological factors.
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