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Havermann, F.* ; Ghirardo, A. ; Schnitzler, J.-P. ; Nendel, C.* ; Hoffmann, M.* ; Kraus, D.* ; Grote, R.*

Modeling intra- and interannual variability of BVOC emissions from maize, oil-seed rape, and ryegrass.

J. Adv. Model. Earth Syst. 14:e2021MS002683 (2022)
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Open Access Gold
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Air chemistry is affected by the emission of biogenic volatile organic compounds (BVOCs), which originate from almost all plants in varying qualities and quantities. They also vary widely among different crops, an aspect that has been largely neglected in emission inventories. In particular, bioenergy-related species can emit mixtures of highly reactive compounds that have received little attention so far. For such species, long-term field observations of BVOC exchange from relevant crops covering different phenological phases are scarcely available. Therefore, we measured and modeled the emission of three prominent European bioenergy crops (maize, ryegrass, and oil-seed rape) for full rotations in north-eastern Germany. Using a proton transfer reaction–mass spectrometer combined with automatically moving large canopy chambers, we were able to quantify the characteristic seasonal BVOC flux dynamics of each crop species. The measured BVOC fluxes were used to parameterize and evaluate the BVOC emission module (JJv) of the physiology-oriented LandscapeDNDC model, which was enhanced to cover de novo emissions as well as those from plant storage pools. Parameters are defined for each compound individually. The model is used for simulating total compound-specific reactivity over several years and also to evaluate the importance of these emissions for air chemistry. We can demonstrate substantial differences between the investigated crops with oil-seed rape having 37-fold higher total annual emissions than maize. However, due to a higher chemical reactivity of the emitted blend in maize, potential impacts on atmospheric OH-chemistry are only 6-fold higher.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Biogenic Volatile Organic Compounds ; Brassica Napus ; Lolium Multiflorum ; Plant Ontogenetic Stage ; Process-based Modeling ; Zea Mays
ISSN (print) / ISBN 1942-2466
e-ISSN 1942-2466
Quellenangaben Volume: 14, Issue: 3, Pages: , Article Number: e2021MS002683 Supplement: ,
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed