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| Titel |
Characterization of urban aerosol in Cork city (Ireland) using aerosol mass spectrometry |
| VerfasserIn |
M. Dall'Osto, J. Ovadnevaite, D. Ceburnis, D. Martin, R. M. Healy, I. P. O'Connor, I. Kourtchev, J. R. Sodeau, J. C. Wenger, C. O'Dowd |
| 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 ; 13, no. 9 ; Nr. 13, no. 9 (2013-05-15), S.4997-5015 |
| Datensatznummer |
250018653
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| Publikation (Nr.) |
 copernicus.org/acp-13-4997-2013.pdf |
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| Zusammenfassung |
Ambient wintertime background urban aerosol in Cork city, Ireland, was
characterized using aerosol mass spectrometry. During the three-week
measurement study in 2009, 93% of the ca. 1 350 000 single particles
characterized by an Aerosol Time-of-Flight Mass Spectrometer (TSI ATOFMS)
were classified into five organic-rich particle types, internally mixed to
different proportions with elemental carbon (EC), sulphate and nitrate,
while the remaining 7% was predominantly inorganic in nature.
Non-refractory PM1 aerosol was characterized using a High Resolution
Time-of-Flight Aerosol Mass Spectrometer (Aerodyne HR-ToF-AMS) and was also
found to comprise organic aerosol as the most abundant species (62%),
followed by nitrate (15%), sulphate (9%) and ammonium (9%), and
chloride (5%).
Positive matrix factorization (PMF) was applied to the HR-ToF-AMS organic
matrix, and a five-factor solution was found to describe the variance in the
data well. Specifically, "hydrocarbon-like" organic aerosol (HOA) comprised
20% of the mass, "low-volatility" oxygenated organic aerosol (LV-OOA)
comprised 18%, "biomass burning" organic aerosol (BBOA) comprised
23%, non-wood solid-fuel combustion "peat and coal" organic aerosol
(PCOA) comprised 21%, and finally a species type characterized by primary
\textit{m/z}~peaks at 41 and 55, similar to previously reported "cooking"
organic aerosol (COA), but possessing different diurnal variations to what
would be expected for cooking activities, contributed 18%.
Correlations between the different particle types obtained by the two
aerosol mass spectrometers are also discussed. Despite wood, coal and peat
being minor fuel types used for domestic space heating in urban areas, their
relatively low combustion efficiencies result in a significant contribution
to PM1 aerosol mass (44% and 28% of the total organic aerosol
mass and non-refractory total PM1, respectively). |
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