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| Titel |
Impact of Chinese anthropogenic emissions on submicrometer aerosol concentration at Mt. Tateyama, Japan |
| VerfasserIn |
K. Osada, T. Ohara, I. Uno, M. Kido, H. Iida |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 9, no. 23 ; Nr. 9, no. 23 (2009-12-02), S.9111-9120 |
| Datensatznummer |
250007780
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| Publikation (Nr.) |
 copernicus.org/acp-9-9111-2009.pdf |
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| Zusammenfassung |
| Rapid Asian economic development might engender secondary impacts of
atmospheric aerosol particles over the western Pacific after conversion of
gaseous pollutants such as SO2. To elucidate changes in aerosol
concentrations in leeward areas undergoing remarkable industrialization, the
number-size distributions of submicrometer (0.3–1.0 μm) aerosols
were measured at Murododaira (36.6° N, 137.6° E, 2450 m a.s.l.) on the
western flank of Mount Tateyama in central Japan during January 1999–February 2009.
Nighttime data obtained from 2400 to 0500 were used to
analyze free-tropospheric aerosol concentration. Monthly average volume
concentrations were calculated for months with >50% daily data
coverage. Volume concentrations of submicrometer aerosols were high in
spring to early summer and low in winter. Significant increasing trends at
95% confidence levels were found for volume concentrations in
winter–spring. Simulated monthly anthropogenic aerosol concentrations at
Mt. Tateyama from results of regional aerosol modeling with emission
inventory up to 2005 showed seasonal variation and winter–spring
increasing trends similar to those of observed aerosol concentration.
According to the model analyses, the contribution of anthropogenic aerosol
concentrations derived from China was high during winter–spring (60–80%
of total anthropogenic aerosols at Mt. Tateyama). This accords with the
increasing trend observed for winter–spring. Because SO42− is the
dominant component of total anthropogenic aerosols, these results suggest
that increasing anthropogenic emissions, especially for SO2, in China,
engender enhancement of submicrometer-diameter aerosols over Japan during
winter–spring. |
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