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Long term measurements of volatile organic compounds exchanges above a maize field at Lonzee (Belgium)
Bachy, Aurélie; Aubinet, Marc; SALERNO, Giovanni et al.
2013In Communications in Agricultural and Applied Biological Sciences, 78 (1), p. 127-132
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Keywords :
Volatile organic compounds; maize; eddy covariance; PTR-MS; fluxes; methanol; green leaf volatile; acetic acid
Abstract :
[en] VOC (volatile organic compounds) include a wide set of molecules which are mostly emitted by the plants. Atmospheric scientists are strongly interested in these compounds because of their important role in the atmospheric chemistry and their final impact on air pollution and climate change. Evaluation of current and future VOC emissions is thus necessary and requires a comprehensive understanding of VOC production and exchange dynamics under a wide panel of climatic conditions and ecosystems. Forest and non pastured grasslands have been largely studied for the last decade. However, knowledge about VOC fluxes from croplands remains scarce. Our study focuses on the VOC exchanges between a maize field and the atmosphere. It is incorporated in a wider project that aims to study VOC fluxes from two croplands (maize and winter wheat) and a pastured grassland. VOC fluxes have been measured on a maize field during the whole growing season using a micrometeorological method (eddy covariance). While first results show half-hourly bidirectionnal exchanges among all the preselected compounds, in average methanol stands for the greatest emitted VOC, followed by green leaf volatiles, and acetic acid is the greatest taken up VOC. Small isoprene and monoterpenes fluxes are also observed. A diurnal pattern is found for all those VOC, with greater emission/uptake during the day, suggesting a flux dependence on environmental parameters. These environmental controls will be further investigated
Disciplines :
Agriculture & agronomy
Environmental sciences & ecology
Author, co-author :
Bachy, Aurélie ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Aubinet, Marc ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
SALERNO, Giovanni ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Schoon, Niels
Amelynck, Crist
Bodson, Bernard ;  Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées
Moureaux, Christine ;  Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées
Heinesch, Bernard  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Language :
English
Title :
Long term measurements of volatile organic compounds exchanges above a maize field at Lonzee (Belgium)
Publication date :
February 2013
Event name :
18th National Symposium on Applied Biological Sciences
Event place :
Gent, Belgium
Event date :
February, 8th 2013
Journal title :
Communications in Agricultural and Applied Biological Sciences
ISSN :
1379-1176
Publisher :
Universiteit Gent. Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen, Gent, Belgium
Volume :
78
Issue :
1
Pages :
127-132
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
CROPVOC
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 22 April 2013

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