Amelynck, C

Demarcke, M

Dewulf, Jo

Joó, Éva

Müller, JF

Pokorska, Olga

Samson, R

Schietse, Lieselotte

Schoon, N

Simpraga, Maja

Steppe, Kathy

Van Langenhove, Herman

English

Ghent University Academic Bibliography

Geophysical Research Abstracts,Vol. 11, EGU2009-672-2, 2009EGU General Assembly 2009© Author(s) 2009Changes in BVOC emission pattern from Fagus sylvatica L. measured bythermal desorber GC-MSÉ. Joó (1), H. Van Langenhove (1), L. Schietse (1), O. Pokorska (1), M. Šimpraga (2), K. Steppe (2), M.Demarcke (3), C. Amelynck (3), N. Schoon (3), J.-F. Müller (3), R. Samson (4), and J. Dewulf (1)(1) Research Group Environmental Organic Chemistry and Technology (EnVOC), Faculty of Bioscience Engineering, GhentUniversity, Ghent, Belgium (eva.joo@ugent.be), (2) Laboratory of Plant Ecology, Faculty of Bioscience Engineering, GhentUniversity, Ghent, Belgium, (3) Belgian Institute for Space Aeronomy, Brussels, Belgium, (4) Department of BioscienceEngineering, Faculty of Science, University of Antwerp, Antwerp, BelgiumConsiderable attention has been focused on biogenic volatile organic compound (BVOC) emissions from forestecosystems because of their contribution to tropospheric oxidation processes and secondary aerosol formation[1, 2]. It became apparent that biogenic emissions show much more variation than previously assumed. In thisposter we focus on the change in BVOC emission patterns from a four year old Fagus sylvatica L. during a growthchamber experiment (PAR, temperature controlled) lasting from March to November 2008.A dynamic branch enclosure system was used in our experiments. Ozone and VOC were removed from airentering the cuvette, as ozone level was found to be a critical parameter for degradation of the compounds[3]. Samples were collected on Tenax TA-Carbotrap solid phase adsorbent tubes and analyzed by TD-GC-MS.Measurements started before budburst of the tree and finished at the end of autumn.Over the entire period 33 samples have been analyzed, while 16 compounds were detected, including 10monoterpenes (MT), 2 oxygenated-MTs, 2 sesquiterpenes (SQT), isoprene and methyl salicylate. Sabineneshowed the highest emission, in an agreement with previous studies [4, 5].Quantifiable emission appeared 21 days after budburst, and reached the highest level at the beginning ofsummer. MT emissions showed a clear trend in following each other. As an illustration the trend of sabinene andlimonene emission is presented.In the middle of autumn phytophaga infection was observed on the tree induced by Two-spotted mite (Tetranychusurticae). New compounds appeared as a result of infection (linalool, methyl salicylate, (E,E)-α-farnesene, un-known oxygenated-MT, unknown SQT) and became dominant over sabinene, explained by the low MT emissionsat this time of the year.These observations point at the importance of further investigation of BVOC emissions (especially SQTsand oxygenated-MTs) and the need for a proper quantification system of these compounds.We would like to emphasize our acknowledgement to BELSPO (Belgian Science Policy; IMPECVOC con-tract # SD/TE/03A) and to FWO (Fonds voor Wetenschappelijk Onderzoek; contract # B/07659/02) for supportingthe research program.[1] Ortega et al. (2008) Chemosphere (72) 365-380[2] Duhl et al. (2008) Biogeosciences (5) 761-777[3] Pollmann et al. (2005) Environ. Sci. Technol. (39) 9620-9629[4] Moukhtar et al. (2005) Atmos. Environ. (39) 3535-3547[5] Holzke et al. (2006) J. Atmos. Chem. (55) 81-102

Changes in BVOC emission pattern from Fagus sylvatica L. measured by thermal desorber GC-MS

https://biblio.ugent.be/publication/680595/file/751155

Changes in BVOC emission pattern from Fagus sylvatica L. measured by thermal desorber GC-MS

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