Modeling atmospheric chemistry: Interactions between gas-phase species and
liquid cloud/aerosol particles
R. Sander
Surv. Geophys., 20, 1-31 (1999)
Abstract. For detailed modeling of atmospheric chemistry it is necessary
to consider aqueous-phase reactions in cloud droplets and deliquesced aerosol
particles. Often, the gas-phase concentration is in equilibrium with the
aqueous phase. Then Henry's law can be used to describe the distribution
between the phases provided that the Henry's law coefficient is known. In some
cases, thermodynamic equilibrium will not be reached and it is necessary to use
kinetic expressions of the rates involved. These rates depend on diffusion
constants, accommodation coefficients, Henry's law coefficients, particle size
distributions, and several other parameters. This review describes how these
processes can be treated in computer modeling and how the necessary data can be
obtained. Even though it is written primarily for use in modeling atmospheric
chemistry, some parts will also be useful for waste water and pesticide control
and in other areas where the distribution of chemicals between the aqueous and
the gas phase is important.
Errata
- In the caption of Figure 6, the units for RN,
RA, and RV are of course meter and not micrometer.
- Page 28: Since RV is a radius and not a volume, it
cannot be the median aerosol volume. More accurately, RV is
the radius of a particle that has the median aerosol volume of
4/3*pi*RV3.
To obtain a reprint of the full text, please send an email
to rolf.sander@mpic.de. Please state if you can accept it in
electronic format (zipped postscript file). This is easier for me and
quicker for you than snailmail.
Rolf Sander
(01 Jun 2011)