Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Compartment specific chiral pinene emissions identified in a Maritime pine forest


Byron,  Joseph
Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Staudt, M., Byron, J., Piquemal, K., & Williams, J. (2019). Compartment specific chiral pinene emissions identified in a Maritime pine forest. Science of the Total Environment, 654, 1158-1166. doi:10.1016/j.scitotenv.2018.11.146.

Cite as: https://hdl.handle.net/21.11116/0000-0003-0C46-2
To track unknown sources and sinks of volatile organic compounds (VOCs) inside forest canopies we measured diel cycles of VOC exchanges in a temperate maritime forest at the branch, stem and ground level with special focus on the chiral signatures of pinenes. All compartments released day and night α- and β-pinene as major compounds. In addition, strong light dependent emissions of ocimene and linalool from branches occurred during hot summer days. In all compartments the overall emission strength of pinenes varied from day to day spanning 1 to 2 orders of magnitude. The highest pinene emissions from ground and stem were observed during high moisture conditions. Despite this variability stem emissions consistently expressed a different chiral composition than branch emissions, the former containing a much larger fraction of (−)-enantiomers than the latter. Pinene emissions from dead needle litter and soil were mostly enriched in (−)-enantiomers, while the chiral signatures of the ambient air inside the forest showed mostly intermediate levels compared to the emission signatures. These findings suggest that different organ-specific pinene producing enzymes exist in Maritime pine, and indicate that emissions from ground and stem compartments essentially contribute to the canopy VOC flux. Overall the results open new perspectives to explore chirality as a possible marker to recognize shifts in the contributions of different VOC sources present within forest ecosystems and to explain observed temporal changes in the chiral signature of pinenes in the atmosphere.