Source region attribution of PM2.5 mass concentrations over Japan

Kohei Ikeda, Kazuyo Yamaji, Yugo Kanaya, Fumikazu Taketani, Xiaole Pan, Yuichi Komazaki, Jun Ichi Kurokawa, Toshimasa Ohara

Research output: Contribution to journalArticle

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Abstract

We estimated the contributions of source regions in East Asia to PM2.5 mass concentrations over Japan for the year 2010 using a regional chemical transport model with an emission sensitivity approach. The horizontal distributions and temporal variations of PM2.5 concentrations were generally well reproduced by the model. The relative contribution of China to the annual mean PM2.5 concentration was estimated to be 50-60% in western Japan (from Kyushu to Kinki), and 40% in the Kanto area. Central north China (105°E-124°E, 34°N-42°N) made a particularly significant contribution, accounting for 20-40% of the annual mean PM2.5 concentration for the whole of Japan. The contribution from foreign sources increased in spring, autumn, and winter in western Japan, and in spring in the Kanto area. The domestic contribution was estimated to be 20-50%. The sum of contributions from foreign anthropogenic sources was greater than the domestic pollution in each receptor region except the Kanto region. The results were obtained from sensitivity simulations with reduced anthropogenic emissions from each source region by 20%. The uncertainties in the source-receptor relationship for annual mean PM2.5 concentrations were estimated to be within a few percent, from additional sensitivity simulations with different perturbations (a 20% increase and a 50% reduction). The model results suggest that regional-scale transport in East Asia has a significant impact on the attainment of the PM2.5 environmental standard in Japan.

Original languageEnglish
Pages (from-to)185-194
Number of pages10
JournalGEOCHEMICAL JOURNAL
Volume49
Issue number2
DOIs
Publication statusPublished - Jan 1 2015

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Japan
sensitivity
China
horizontal distribution
Pollution
anthropogenic source
autumn
simulation
pollution
temporal variation
winter
perturbation
Asia
Uncertainty

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Ikeda, K., Yamaji, K., Kanaya, Y., Taketani, F., Pan, X., Komazaki, Y., ... Ohara, T. (2015). Source region attribution of PM2.5 mass concentrations over Japan. GEOCHEMICAL JOURNAL, 49(2), 185-194. https://doi.org/10.2343/geochemj.2.0344

Source region attribution of PM2.5 mass concentrations over Japan. / Ikeda, Kohei; Yamaji, Kazuyo; Kanaya, Yugo; Taketani, Fumikazu; Pan, Xiaole; Komazaki, Yuichi; Kurokawa, Jun Ichi; Ohara, Toshimasa.

In: GEOCHEMICAL JOURNAL, Vol. 49, No. 2, 01.01.2015, p. 185-194.

Research output: Contribution to journalArticle

Ikeda, K, Yamaji, K, Kanaya, Y, Taketani, F, Pan, X, Komazaki, Y, Kurokawa, JI & Ohara, T 2015, 'Source region attribution of PM2.5 mass concentrations over Japan', GEOCHEMICAL JOURNAL, vol. 49, no. 2, pp. 185-194. https://doi.org/10.2343/geochemj.2.0344
Ikeda K, Yamaji K, Kanaya Y, Taketani F, Pan X, Komazaki Y et al. Source region attribution of PM2.5 mass concentrations over Japan. GEOCHEMICAL JOURNAL. 2015 Jan 1;49(2):185-194. https://doi.org/10.2343/geochemj.2.0344
Ikeda, Kohei ; Yamaji, Kazuyo ; Kanaya, Yugo ; Taketani, Fumikazu ; Pan, Xiaole ; Komazaki, Yuichi ; Kurokawa, Jun Ichi ; Ohara, Toshimasa. / Source region attribution of PM2.5 mass concentrations over Japan. In: GEOCHEMICAL JOURNAL. 2015 ; Vol. 49, No. 2. pp. 185-194.
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