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| Titel |
Spatiotemporal variations of air pollutants (O3, NO2, SO2, CO, PM10, and VOCs) with land-use types |
| VerfasserIn |
J.-M. Yoo, M.-J. Jeong, D. Kim, W. R. Stockwell, J.-H. Yang, H.-W. Shin, M.-I. Lee, C.-K. Song, S.-D. Lee |
| 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 ; 15, no. 18 ; Nr. 15, no. 18 (2015-09-30), S.10857-10885 |
| Datensatznummer |
250120065
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| Publikation (Nr.) |
 copernicus.org/acp-15-10857-2015.pdf |
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| Zusammenfassung |
| The spatiotemporal variations of surface air pollutants (O3, NO2,
SO2, CO, and PM10) with four land-use types, residence (R),
commerce (C), industry (I) and greenbelt (G), have been investigated at 283
stations in South Korea during 2002–2013, using routinely observed data. The
volatile organic compound (VOC) data at nine photochemical pollutant
monitoring stations available since 2007 were utilized in order to examine
their effect on the ozone chemistry. The land-use types, set by the Korean
government, were generally consistent with the satellite-derived land covers
and with the previous result showing anti-correlation between O3 and
NO2 in diverse urban areas. The relationship between the two pollutants
in the Seoul Metropolitan Area (SMA) residence land-use areas was
substantially different from that outside of the SMA, probably due to the
local differences in vehicle emissions. The highest concentrations of air
pollutants in the diurnal, weekly, and annual cycles were found in industry
for SO2 and PMPM10, in commerce for NO2 and CO, and in greenbelt
for O3. The concentrations of air pollutants, except for O3, were
generally higher in big cities during weekdays, while O3 showed its peak
in suburban areas or small cities during weekends. The weekly cycle and
trends of O3 were significantly out of phase with those of NO2,
particularly in the residential and commercial areas, suggesting that vehicle
emission was a major source in those areas. The ratios of VOCs to NO2
for each of the land-use types were in the order of I (10.2) > C
(8.7) > G (3.9) > R (3.6), suggesting that most areas in South Korea
were likely to be VOC-limited for ozone chemistry. The pollutants (NO2,
SO2, CO, and PMPM10 except for O3 have decreased, most likely
due to the effective government control. The total oxidant values (OX =
O3 + NO2) with the land-use types were analyzed for the local and
regional (or background) contributions of O3, respectively, and the
order of OX (ppb) was C (57.4) > R (53.6) > I (50.7) > G (45.4),
indicating the greenbelt observation was close to the background. |
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