Berlin 2005 – wissenschaftliches Programm

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UP: Umweltphysik

UP 4: Atmosph
ärische Spurengase und Aerosole: Intrumentelles II

UP 4.2: Fachvortrag

Montag, 7. März 2005, 16:45–17:00, TU TA201

PTR-MS in Environmental Research: Biogenic VOCs — •Armin Hansel, Armin Wisthaler, Jonathan Beauchamp, Wolfgang Grabmer, and Martin Graus — Institut für Ionenphysik, Leopold-Franzens-Universität, A-6020 Innsbruck, Austria

PTR-MS allows for on-line measurements of VOCs at pptv levels. This well-established analytical tool has been used in a variety of research, including investigation of VOCs in food (e.g. quality control or food degradation studies), as well as being used as a tool for non-invasive medical diagnostics (e.g. human breath analysis). In addition to these fields of study, PTR-MS has been widely used in environmental research, from trace gas analysis in the troposphere to VOC emissions from plants.

Participation in the BEWA and ECHO field campaigns (AFO 2000) by our group involved a variety of investigations for monitoring biogenic emissions. These included the technique of disjunct eddy covariance for flux measurements above a forest canopy, C-13 carbon labelling experiments to follow carbon use in plants, and stress-induced VOC emission investigations to study how plants react to stress (e.g. ozone exposure). A selection of results from these investigations will be presented.