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| Titel |
Sources of atmospheric aerosols controlling PM10 levels in Heraklion, Crete during winter time |
| VerfasserIn |
Nikolaos Kalivitis, Giorgos Kouvarakis, Iasonas Stavroulas, Maria Kandilogiannaki, Katerina Vavadaki, Nikolaos Mihalopoulos |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250135880
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| Publikation (Nr.) |
 EGU/EGU2016-16797.pdf |
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| Zusammenfassung |
| High concentrations of Particulate Matter (PM) in the atmosphere have negative impact to
human health. Thresholds for ambient concentrations that are defined by the directive
2008/50/EC are frequently exceeded even at background conditions in the Mediterranean
region as shown in earlier studies. The sources of atmospheric particles in the urban
environment of a medium size city of eastern Mediterranean are studied in the present work
in order to better understand the causes and characteristics of exceedances of the daily mean
PM10limit value of 50 μg m−3. Measurements were performed at the atmospheric quality
measurement station of the Region of Crete, at the Heraklion city center on Crete island,
during the winter/spring period of 2014-2015 and 2015-2016. Special emphasis was given to
the study of the contribution of Black Carbon (BC) to the levels of PM10. Continuous
measurements were performed using a beta-attenuation PM10monitor and a 7-wavelength
Aethalometer with a time resolution of 30 and 5 minutes respectively. For direct
comparison to background regional conditions, concurrent routine measurements at
the atmospheric research station of University of Crete at Finokalia were used as
background reference. Analysis of exceedances in the daily PM10 mass concentration
showed that the total of the exceedances was related to long range transport of
Saharan dust rather than local sources. However, compared to the Finokalia station it
was found that there were 20% more exceedances in Heraklion, the addition of
transported dust on the local pollution was the reason for the additional exceedance days.
Excluding dust events, it was found that the PM10variability was dependent on the
BC abundance, traffic during rush hours in the morning and biomass burning for
domestic heating in the evening contributed significantly to PM10levels in Heraklion. |
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