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| Titel |
Is forest management a significant source of monoterpenes into the boreal atmosphere? |
| VerfasserIn |
S. Haapanala, H. Hakola, H. Hellén, M. Vestenius, J. Levula, J. Rinne |
| 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 ; 9, no. 4 ; Nr. 9, no. 4 (2012-04-10), S.1291-1300 |
| Datensatznummer |
250006943
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| Publikation (Nr.) |
 copernicus.org/bg-9-1291-2012.pdf |
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| Zusammenfassung |
| Volatile organic compounds (VOCs) including terpenoids are emitted into the
atmosphere from various natural sources. Damaging the plant tissue is known
to strongly increase their monoterpene release. We measured the terpenoid
emissions caused by timber felling, i.e. those from stumps and logging
residue. The emissions from stumps were studied using enclosures and those
from the whole felling area using an ecosystem-scale micrometeorological
method, disjunct eddy accumulation (DEA). The compounds analyzed were
isoprene, monoterpenes and sesquiterpenes. Strong emissions of monoterpenes
were measured from both the stumps and from the whole felling area. The
emission rate decreased rapidly within a few months after the logging. In
addition to fresh logging residue, the results suggest also other strong
monoterpene sources may be present in the felling area. These could include
pre-existing litter, increased microbial activity and remaining undergrowth.
In order to evaluate the possible importance of monoterpenes emitted
annually from cut Scots pine forests in Finland, we conducted a rough
upscaling calculation. The resulting monoterpene release was approximated to
be on the order of 15 kilotonnes per year, which corresponds to about one
tenth of the monoterpene release from intact forests in Finland. |
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