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| Titel |
C2-C10 hydrocarbon emissions from a boreal wetland and forest floor |
| VerfasserIn |
H. Hellén, H. Hakola, K.-H. Pystynen, J. Rinne, S. Haapanala |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 3, no. 2 ; Nr. 3, no. 2 (2006-04-28), S.167-174 |
| Datensatznummer |
250000886
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| Publikation (Nr.) |
 copernicus.org/bg-3-167-2006.pdf |
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| Zusammenfassung |
| Emissions of various C2-C10 hydrocarbons (VOCs) and halogenated
hydrocarbons (VHOCs) from a boreal wetland and a Scots pine forest floor in
south-western Finland were measured by the static chamber technique.
Isoprene was the main non-methane hydrocarbon emitted by the wetland, but
small emissions of ethene, propane, propene, 1-butene, 2-methylpropene,
butane, pentane and hexane were also detected. The isoprene emission from
the wetland was observed to follow the commonly-used isoprene emission
algorithm. The mean emission potential of isoprene was 224 µg m-2 h-1 for the whole season. This is lower than the emission potentials
published earlier; that is probably at least partly due to the cold and
cloudy weather during the measurements. No emissions were detected of
monoterpenes or halogenated hydrocarbons from the wetland. The highest
hydrocarbon emissions from the Scots pine forest floor were measured in
spring and autumn. However, only a few measurements were conducted during
summer. The main compounds emitted were monoterpenes. Isoprene emissions
were negligible. The total monoterpene emission rates varied from zero to
373 µg m-2 h-1. The results indicated that decaying plant
litter may be the source for these emissions. Small emissions of chloroform
(100-800 ng m-2 h-1), ethene, propane, propene, 2-methylpropene,
cis-2-butene, pentane, hexane and heptane were detected. Comparison with
Scots pine emissions showed that the forest floor may be an important
monoterpene source, especially in spring. |
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