| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4443890 | Atmospheric Environment | 2006 | 12 Pages |
Abstract
A relaxed-eddy-accumulation set-up using an online gas-chromatographic technique and proton-transfer-reaction mass spectrometry was applied to determine isoprenoid fluxes above a Norway spruce forest in July 2001/2002. The system was quality assured and its suitability for determination of canopy fluxes of isoprenoids was demonstrated. Flux measurements of oxygenated hydrocarbons failed the data quality check due to artefacts presumably arising from line and ozone-scrubber effects. Observations of turbulent fluxes of isoprenoids during the two field experiments show good agreements with primary flux data derived from enclosure measurements and modelling results using a canopy-chemistry emission model (CACHE). For monoterpenes maximum daytime fluxes of more than 2nmolm-2s-1 were observed, isoprene fluxes reached 1-1.5nmolm-2s-1.
Keywords
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Physical Sciences and Engineering
Earth and Planetary Sciences
Atmospheric Science
Authors
Martin Graus, Armin Hansel, Armin Wisthaler, Christian Lindinger, Renate Forkel, Karin Hauff, Matthias Klauer, Andreas Pfichner, Bernhard Rappenglück, Dominik Steigner, Rainer Steinbrecher,