EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Biogenic VOC profiles emissions of Rapeseed leaf litter and their SOA formation potential

Letizia Abis1, Carmen Kalalian2, Tao Wang4, Bastien Lunardelli2, Sebastien Perrier2, Benjamin Loubet3, Raluca Ciuraru3, and Christian George2
Letizia Abis et al.
  • 1Technische Universität Berlin, Umweltchemie und Luftrinhaltunz, Straße des 17. Juni 135
  • 2Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, F-69626, Villeurbanne, France
  • 3INRAE, UMR ECOSYS, AgroParisTech, Université Paris-Saclay, 78850, Thiverval-Grignon, France
  • 4Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University, Shanghai,200433, Peoples' Republic of China

The annual global leaf litter production has been estimated between 75 and 135 Pg DM yr-1 contributing to the 10% of the global annual emission of acetone and methanol. Besides their impact on atmospheric chemistry, little attention has been drawn to leaves litter and their contribution to the bVOC emissions and their SOA formation potential.

The purpose of this study is to analyze the bVOC (biogenic volatile organic compounds) emissions from rapeseed leaves litter and their contribution to SOA (secondary organic aerosol) formation under three different conditions: (I) the presence of a UV light irradiation (II) the presence of ozone, and (III) a combination of the previous two. To reach this goal, bVOC and aerosol numbers have been measured for 6 days in a controlled atmospheric chamber containing leaf litter samples.

Results showed that VOC emission profiles were affected by the UV light irradiation, which increased the summed VOC emissions compared to the experiment with O3. Furthermore, the diversity of the VOC emitted from the rapeseed litter increased with the UV light irradiation. The highlight of this study is that the SOA formation rate observed when leaf litter was exposed to both UV light and O3 indicates a potentially large source of atmospheric pollution at the local scale. To our knowledge, this study investigates for the first time the effect of UV irradiation and O3 exposure on both VOC emissions and SOA formation for leaf litter samples. A detailed discussion about the processes behind the biological production of the most important VOC is proposed.

How to cite: Abis, L., Kalalian, C., Wang, T., Lunardelli, B., Perrier, S., Loubet, B., Ciuraru, R., and George, C.: Biogenic VOC profiles emissions of Rapeseed leaf litter and their SOA formation potential, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-14981,, 2021.

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