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| Titel |
Particle size distribution factor as an indicator for the impact of the Eyjafjallajökull ash plume at ground level in Augsburg, Germany |
| VerfasserIn |
M. Pitz, J. Gu, J. Soentgen, A. Peters, J. Cyrys |
| 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 ; 11, no. 17 ; Nr. 11, no. 17 (2011-09-09), S.9367-9374 |
| Datensatznummer |
250010068
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| Publikation (Nr.) |
 copernicus.org/acp-11-9367-2011.pdf |
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| Zusammenfassung |
| During the time period of the Eyjafjallajökull volcano eruption in 2010
increased mass concentration of PM10 (particulate matter, diameter
<10 μm) were observed at ground level in Augsburg, Germany. In
particular on 19 and 20 April 2010 the daily PM10 limit value of
50 μg m−3 was exceeded. Because ambient particles are in general a
complex mixture originating from different sources, a source apportionment
method (positive matrix factorization (PMF)) was applied to particle size
distribution data in the size range from 3 nm to 10 μm to identify and
estimate the volcanic ash contribution to the overall PM10 load in the
ambient air in Augsburg. A PMF factor with relevant particle mass
concentration in the size range between 1 and 4 μm (maximum at
2 μm) was associated with long range transported dust. This factor increased
from background concentration to high levels simultaneously with the arrival
of the volcanic ash plume in the planetary boundary layer. Hence, we assume
that this factor could be used as an indicator for the impact of the
Eyjafjallajökull ash plume on ground level in Augsburg. From 17 to 22
April 2010 long range transported dust factor contributed on average 30 %
(12 μg m−3) to PM10. On 19 April 2010 at 20:00 UTC+1 the
maximum percentage of the long range transported dust factor accounted for
around 65 % (35 μg m−3) to PM10 and three hours later the
maximum absolute value with around 48 μg m−3 (61 %) was
observed. Additional PMF analyses for a Saharan dust event occurred in May
and June 2008 suggest, that the long range transported dust factor could
also be used as an indicator for Saharan dust events. |
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