HR: 1330h
AN: A32A-0118    [PDF]
TI: Measurement of trace gas emissions of spruce (Picea abies) by different techniques including PTR-MS at the BEWA field campaign 2002
AU: Grabmer, W
EM: wolfgang.grabmer@uibk.ac.at
AF: Institut fuer Ionenphysik, Univ. Innsbruck, Technikerstr. 25, Innsbruck, 6020 Austria
AU: Cojocariu, C
AF: Institut fuer Forstbotanik und Baumphysiologie, Albert-Ludwigs-Universitaet, Georges-Koehler-Allee Geb. 053/054, Freiburg i. Br., 79110 Germany
AU: Graus, M
AF: Institut fuer Ionenphysik, Univ. Innsbruck, Technikerstr. 25, Innsbruck, 6020 Austria
AU: Wisthaler, A
AF: Institut fuer Ionenphysik, Univ. Innsbruck, Technikerstr. 25, Innsbruck, 6020 Austria
AU: Wisthaler, A
AF: Institut fuer Forstbotanik und Baumphysiologie, Albert-Ludwigs-Universitaet, Georges-Koehler-Allee Geb. 053/054, Freiburg i. Br., 79110 Germany
AU: Kreuzwieser, J
AF: Institut fuer Forstbotanik und Baumphysiologie, Albert-Ludwigs-Universitaet, Georges-Koehler-Allee Geb. 053/054, Freiburg i. Br., 79110 Germany
AU: Rennenberg, H
AF: Institut fuer Forstbotanik und Baumphysiologie, Albert-Ludwigs-Universitaet, Georges-Koehler-Allee Geb. 053/054, Freiburg i. Br., 79110 Germany
AU: * Hansel, A
AF: Institut fuer Ionenphysik, Univ. Innsbruck, Technikerstr. 25, Innsbruck, 6020 Austria
AB: Proton transfer reaction mass spectrometry (PTR-MS) was used to measure VOC fluxes from Norway spruce (Picea abies) during the BEWA field campaign 2002. The BEWA measuring tower is located in the Bavarian "Fichtelgebirge" at $50\deg$09' N and $11\deg$52' E in Germany. The site is at 776 m a.s.l. and has got an alpine-like climate. A dynamically flushed enclosure system was used for the measurement of trace gas emissions: One enclosure was kept empty as a reference. The other enclosure contained a spruce twig of ca. 8 cm length at a height of about 13 m from the ground. The main compounds monitored on-line were methanol, acetaldehyde, acetone, isoprene, and the monoterpenes. The PTR-MS system continuously analysed all selected VOCs in the air from the plant enclosure over a 3 minute cycle. The empty enclosure was measured every hour. From these data emission rates were calculated. By the use of different algorithms standard emission rates for all compounds were determined. The results for isoprene and monterpenes lie within the values reported in the literature, however on the lower limit. Apparently plants had adapted to the low temperatures during the field campaign. Carbonyl compounds were also determined by DNPH-cartridges and subsequent HPLC-analysis. A comparison of DNPH and PTR-MS results will be given.
DE: 0315 Biosphere/atmosphere interactions
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting