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| Titel |
Sources of long-lived atmospheric VOCs at the rural boreal forest site, SMEAR II |
| VerfasserIn |
J. Patokoski, T. M. Ruuskanen, M. K. Kajos, R. Taipale, P. Rantala, J. Aalto, T. Ryyppö, T. Nieminen, H. Hakola, J. Rinne |
| 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. 23 ; Nr. 15, no. 23 (2015-12-07), S.13413-13432 |
| Datensatznummer |
250120203
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| Publikation (Nr.) |
 copernicus.org/acp-15-13413-2015.pdf |
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| Zusammenfassung |
| In this study a long-term volatile organic compound (VOCs) concentration data
set, measured at the SMEAR II (Station for Measuring Ecosystem–Atmosphere
Relations) boreal forest site in Hyytiälä, Finland during the years
2006–2011, was analyzed in order to identify source areas and profiles of
the observed VOCs. VOC mixing ratios were measured using proton transfer
reaction mass spectrometry. Four-day HYSPLIT 4 (Hybrid Single Particle Lagrangian Integrated Trajectory) backward trajectories and the
Unmix 6.0 receptor model were used for source area and source composition
analysis. Two major forest fire events in Russia took place during the
measurement period. The effect of these fires was clearly visible in the
trajectory analysis, lending confidence to the method employed with this data
set. Elevated volume mixing ratios (VMRs) of non-biogenic VOCs related to
forest fires, e.g. acetonitrile and aromatic VOCs, were observed. Ten major
source areas for long-lived VOCs (methanol, acetonitrile, acetaldehyde,
acetone, benzene, and toluene) observed at the SMEAR II site were identified.
The main source areas for all the targeted VOCs were western Russia, northern
Poland, Kaliningrad, and the Baltic countries. Industrial areas in northern
continental Europe were also found to be source areas for certain VOCs. Both
trajectory and receptor analysis showed that air masses from northern
Fennoscandia were less polluted with respect to both the VOCs studied and
other trace gases (CO, SO2 and NOx), compared to areas of
eastern and western continental Europe, western Russia, and southern
Fennoscandia. |
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