The biogeochemical impacts of forests: the role of biogenic secondary organic aerosol in the climate system

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• Catherine Scott (University of Leeds)
• Monday 18 November 2013, 14:15-15:30
• Unilever Lecture Theatre, Department of Chemistry.

If you have a question about this talk, please contact Dr Amanda Maycock.

Plants emit biogenic volatile organic compounds (BVOCs) such as monoterpenes and isoprene into the atmosphere. BVO Cs are rapidly oxidised and form lower volatility products which may partition into the particle phase, forming secondary organic aerosol. Consequently, this process affects the number and size of particles in the atmosphere with important implications for cloud condensation nuclei (CCN) concentrations, and cloud albedo. The role of SOA in the atmosphere is further complicated by the likely role of organic oxidation products in the formation of new particles (nucleation) in the atmosphere.

In this talk I will discuss simulations using a detailed aerosol microphysics model (GLOMAP), designed to determine the radiative effects of biogenic SOA and the processes and parameters to which these effects are sensitive. This allows us to then examine and quantify an additional biogeochemical impact of historical and present-day deforestation.

This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.

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