Role of aerosol chemical composition on the formation of cloud condensation nuclei during biomass burning periods
Swen
Metzger, Max-Planck Institute for Chemistry, Mainz, Germany, metzger@mpch-mainz.mpg.de
Ivonne
Trebs, Max-Planck Institute for Chemistry, Mainz, Germany, ivonne@mpch-mainz.mpg.de
Laurens
Ganzeveld, Max-Planck Institute for Chemistry, Mainz, Germany, ganzevl@mpch-mainz.mpg.de
(Presenting)
Jos
Lelieveld, Max-Planck Institute for Chemistry, Mainz, Germany, lelieveld@mpch-mainz.mpg.de
Philip
Stier, Max-Planck Institute for Meteorology, Hamburg, Germany, stier@dkrz.de
Franz
X.
Meixner, Max-Planck Institute for Chemistry, Mainz, Germany, meixner@mpch-mainz.mpg.de
Meinrat
O.
Andreae, Max-Planck Institute for Chemistry, Mainz, Germany, andreae@mpch-mainz.mpg.de
Paulo
Artaxo, Instituto de Física, Universidade de São Paulo, São Paulo, Brasil, artaxo@fap01.if.usp.br
Amazonian deforestation leads to unique changes in atmospheric gas and aqueous phase chemistry with consequences for gas/aerosol partitioning and cloud formation. Chemical box model studies indicate the importance of organic aerosol compounds for the total cation/anion balance and gas/aerosol partitioning during burning periods. Subsequently, hygroscopic growth of aerosols and cloud formation are affected. To investigate these effects for the Amazonian atmosphere and climate, we apply the Mainz version of the ECHAM5 chemistry climate-model, which includes a modular earth submodel system (MESSy), in which on-line emissions, chemical transformations and deposition of gases and aerosols have been included.
The aerosol scheme includes inorganic and organic secondary aerosols. It consists of a modal aerosol dynamical model (with 7 modes), i.e. M7, coupled to equilibrium simplified gas/aerosol partitioning model (EQSAM), which includes mineral dust components, sea salt and lumped organics in addition to the ammonium-sulfate-nitrate-water system.