Abstract
Microorganisms are present in the atmosphere and can survive in cloud droplets. They are able to transform organic compounds and can consequently compete with radical chemistry. Because the cloud system is a complex multiphase medium, the efficiency of biodegradation by cloud microorganisms has to be evaluated by numerical models of different complexity simulating multiphase chemical processes in clouds. However, only abiotic processes are taken into account in these numerical tools. The objective of this work was thus to integrate biological data in an atmospheric cloud chemistry model and to evaluate the effect of microorganisms in the transformation of chemical compounds. For this, experimental biodegradation rates of acetic and formic acids, formaldehyde and hydrogen peroxide by various bacterial representative of cloud biodiversity were experimentally measured. These values have been implemented in a cloud chemistry model describing aqueous phase chemistry with the explicit CLEPS (Cloud Explicit Physico-chemical Scheme) mechanism. Several simulations with and without biodegradation processes have been performed changing temperature (5 °C or 17 ℃) and actinic flux to simulate summer or winter conditions. The chemical scenario (gas concentrations and emission/deposition) is representative of low-NOx emission with significant isoprene emissions.
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References
P. Amato et al., Survival and ice nucleation activity of bacteria as aerosols in a cloud simulation chamber. Atmos. Chem. Phys. 15, 6455–6465 (2015)
L. Deguillaume et al., Classification of clouds sampled at the puy de Dôme (France) based on 10 yr of monitoring of their physicochemical properties. Atmos. Chem. Phys. 14(3), 1485–1506 (2014)
H. Herrmann et al., Tropospheric aqueous-phase chemistry: kinetics, mechanisms, and its coupling to a changing gas phase. Chem. Rev. 115(10), 4259–4334 (2015)
M. Joly et al., Survival of microbial isolates from clouds toward simulated atmospheric stress factors. Atmos. Environ. 117, 92–97 (2015)
M. Mouchel-Vallon, et al., CLEPS 1.0: a new protocol for cloud aqueous phase oxidation of VOC mechanisms. Geosci. Model Dev. 10(3), 1339–1362 (2017)
M. Vaïtilingom et al., Potential impact of microbial activity on the oxidant capacity and organic carbon budget in clouds. Proc. Natl. Acad. Sci. 110(2), 559–564 (2013)
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Deguillaume, L. et al. (2020). Biological Activity in Clouds: From the Laboratory to the Model. In: Mensink, C., Gong, W., Hakami, A. (eds) Air Pollution Modeling and its Application XXVI. ITM 2018. Springer Proceedings in Complexity. Springer, Cham. https://doi.org/10.1007/978-3-030-22055-6_64
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DOI: https://doi.org/10.1007/978-3-030-22055-6_64
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