Mode and place of origin of carbonaceous aerosols transported from east Asia to cape Hedo, Okinawa, Japan

Kojiro Shimada, Masamichi Shimada, Akinori Takami, Shuichi Hasegawa, Akihiro Fushimi, Takemitsu Arakaki, Watanabe Izumi, Shiro Hatakeyama

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study investigated the source categories and emission areas of carbonaceous aerosols transported from East Asia to the East China Sea. Mass concentrations of heavy metals, ionic components, organic carbon, and elemental carbon (EC) were measured at the Cape Hedo Atmosphere and Aerosol Monitoring Station in Okinawa, Japan, throughout 2010. The relative influences of different categories of aerosols were determined by positive matrix factorization, and the source regions of each emissions category were evaluated by using the total potential source contribution function. Five source categories were identified: dust, sea salt and nitrate, secondary species, coal combustion, and oil combustion. The results showed that the major source of aerosols in North China is coal combustion, whereas the major source in South China, Japan, and Korea is oil combustion. The relative contributions of the five sources to EC concentrations at Cape Hedo were dust 7.0%, sea salt and nitrate 19.1%, secondary species 28.5%, oil combustion 12.8%, and coal combustion 32.6%. In particular, wintertime coal combustion in residential areas of North China contributed significantly to EC in 2010. The results also indicate that the contribution of coal combustion in source areas was higher in winter (52%), whereas the contribution of oil combustion was higher in spring (33%).

Original languageEnglish
Pages (from-to)799-813
Number of pages15
JournalAerosol and Air Quality Research
Volume15
Issue number3
DOIs
Publication statusPublished - 2015
Externally publishedYes

Fingerprint

Coal combustion
Aerosols
aerosol
Oils
combustion
Carbon
oil
sea salt
Nitrates
Dust
carbon
Salts
nitrate
dust
Heavy Metals
Organic carbon
Factorization
Heavy metals
organic carbon
Asia

Keywords

  • Carbonaceous aerosols
  • Contribution to EC
  • Emission area
  • Source area

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution

Cite this

Mode and place of origin of carbonaceous aerosols transported from east Asia to cape Hedo, Okinawa, Japan. / Shimada, Kojiro; Shimada, Masamichi; Takami, Akinori; Hasegawa, Shuichi; Fushimi, Akihiro; Arakaki, Takemitsu; Izumi, Watanabe; Hatakeyama, Shiro.

In: Aerosol and Air Quality Research, Vol. 15, No. 3, 2015, p. 799-813.

Research output: Contribution to journalArticle

Shimada, K, Shimada, M, Takami, A, Hasegawa, S, Fushimi, A, Arakaki, T, Izumi, W & Hatakeyama, S 2015, 'Mode and place of origin of carbonaceous aerosols transported from east Asia to cape Hedo, Okinawa, Japan', Aerosol and Air Quality Research, vol. 15, no. 3, pp. 799-813. https://doi.org/10.4209/aaqr.2014.09.0190
Shimada, Kojiro ; Shimada, Masamichi ; Takami, Akinori ; Hasegawa, Shuichi ; Fushimi, Akihiro ; Arakaki, Takemitsu ; Izumi, Watanabe ; Hatakeyama, Shiro. / Mode and place of origin of carbonaceous aerosols transported from east Asia to cape Hedo, Okinawa, Japan. In: Aerosol and Air Quality Research. 2015 ; Vol. 15, No. 3. pp. 799-813.
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