Abstract
| Original language | English |
|---|---|
| Journal | Plant and Soil |
| Volume | 369 |
| Issue number | 1-2 |
| Pages (from-to) | 241-256 |
| Number of pages | 16 |
| ISSN | 0032-079X |
| DOIs | |
| Publication status | Published - Aug 2013 |
| MoE publication type | A1 Journal article-refereed |
Fields of Science
- 1181 Ecology, evolutionary biology
- VOC
- Boreal forest
- Forest floor
- Automated chamber
- PTR-MS
- 1171 Geosciences
- 1172 Environmental sciences
- 4112 Forestry
Cite this
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Continuous VOC flux measurements on boreal forest floor. / Aaltonen, Hermanni; Aalto, Juho; Kolari, Pasi; Pihlatie, Mari; Pumpanen, Jukka; Kulmala, Markku; Nikinmaa, Eero; Vesala, Timo; Bäck, Jaana.
In: Plant and Soil, Vol. 369, No. 1-2, 08.2013, p. 241-256.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Continuous VOC flux measurements on boreal forest floor
AU - Aaltonen, Hermanni
AU - Aalto, Juho
AU - Kolari, Pasi
AU - Pihlatie, Mari
AU - Pumpanen, Jukka
AU - Kulmala, Markku
AU - Nikinmaa, Eero
AU - Vesala, Timo
AU - Bäck, Jaana
PY - 2013/8
Y1 - 2013/8
N2 - Volatile organic compound (VOC) emissions from biogenic sources are important contributors to chemical reactions in the air. Soil/forest floor VOCs contribute significantly to the ecosystem scale emissions, however, these emissions and their temporal and spatial variations are poorly characterised. The below-canopy VOC emissions have been measured mainly in campaigns; continuous measurements over the whole growing season are rare. VOCs were measured from boreal forest floor over the snow-free season 2010 in southern Finland with automated flow-through chambers connected to proton transfer reaction-mass spectrometer (PTR-MS). We measured 10 masses in total, of which five quantitatively (M33, M45, M59, M69, M137). All of the fluxes showed clear diurnal and seasonal variation, being at their highest in early summer. Spatial variation in the fluxes was great and the lowest rates were found in chambers with dense vegetation cover. Also, VOCs deposition was observed regularly. Monoterpene (M137) emissions were one magnitude higher (up to 264 ng m−2 s−1) than other emissions. The VOC fluxes correlated positively with temperature and light, while relative humidity correlated negatively. Results indicated that forest floor plays a substantial role in the boreal forest total VOC emissions. Understanding the processes controlling VOC emissions requires more detailed analysis and longtime measurements with sufficient time resolution and analytical accuracy.
AB - Volatile organic compound (VOC) emissions from biogenic sources are important contributors to chemical reactions in the air. Soil/forest floor VOCs contribute significantly to the ecosystem scale emissions, however, these emissions and their temporal and spatial variations are poorly characterised. The below-canopy VOC emissions have been measured mainly in campaigns; continuous measurements over the whole growing season are rare. VOCs were measured from boreal forest floor over the snow-free season 2010 in southern Finland with automated flow-through chambers connected to proton transfer reaction-mass spectrometer (PTR-MS). We measured 10 masses in total, of which five quantitatively (M33, M45, M59, M69, M137). All of the fluxes showed clear diurnal and seasonal variation, being at their highest in early summer. Spatial variation in the fluxes was great and the lowest rates were found in chambers with dense vegetation cover. Also, VOCs deposition was observed regularly. Monoterpene (M137) emissions were one magnitude higher (up to 264 ng m−2 s−1) than other emissions. The VOC fluxes correlated positively with temperature and light, while relative humidity correlated negatively. Results indicated that forest floor plays a substantial role in the boreal forest total VOC emissions. Understanding the processes controlling VOC emissions requires more detailed analysis and longtime measurements with sufficient time resolution and analytical accuracy.
KW - 1181 Ecology, evolutionary biology
KW - VOC
KW - Boreal forest
KW - Forest floor
KW - Automated chamber
KW - PTR-MS
KW - 1171 Geosciences
KW - 1172 Environmental sciences
KW - 4112 Forestry
U2 - 10.1007/s11104-012-1553-4
DO - 10.1007/s11104-012-1553-4
M3 - Article
VL - 369
SP - 241
EP - 256
JO - Plant and Soil
JF - Plant and Soil
SN - 0032-079X
IS - 1-2
ER -