Atmospheric Chemistry and Physics Discussions
www.atmos-chem-phys-discuss.net
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2007
10.5194/acpd-7-3301-2007
http://www.atmos-chem-phys-discuss.net/7/3301/2007/
http://www.atmos-chem-phys-discuss.net/7/3301/2007/acpd-7-3301-2007.html
http://www.atmos-chem-phys-discuss.net/7/3301/2007/acpd-7-3301-2007.pdf
3301
3331
2007-03-01
Technical Note: simulation of detailed aerosol chemistry on the global scale using MECCA-AERO
A. Kerkweg
akerkweg@mpch-mainz.mpg.de
R. Sander
H. Tost
P. Jöckel
J. Lelieveld
Air Chemistry Department, Max-Planck Institute of Chemistry, P.O. Box 3060, 55020 Mainz, Germany
We present the MESSy submodel MECCA-AERO, which simulates both
aerosol and gas phase chemistry with the same mechanism.
Including the aerosol phase into the chemistry mechanism increases the
stiffness of the resulting set of differential equations.
The numerical aspects of the approach followed in MECCA-AERO are presented.
<br></br>
MECCA-AERO requires input of an aerosol dynamical/microphysical model to
provide the aerosol size and particle number information of the modes/bins for
which the chemistry is explicitly calculated.
Additional precautions are required to avoid the double counting of processes,
especially for sulphate in the aerosol dynamical and the chemistry model.
This coupling is explained in detail.
<br></br>
To illustrate the capabilities of the new aerosol submodel, examples for
species usually treated in aerosol dynamical models are shown.
The aerosol chemistry as provided by MECCA-AERO is very sumptuous and not
readily applicable for long-term simulations, though it provides a reference
to evaluate simplified approaches.
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