Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 14, 2289-2302, 2014
https://doi.org/10.5194/acp-14-2289-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
04 Mar 2014
A parameterisation for the activation of cloud drops including the effects of semi-volatile organics
P. J. Connolly1, D. O. Topping1, F. Malavelle2, and G. McFiggans1 1School of Earth, Atmospheric and Environmental Sciences, The University of Manchester, Manchester, UK
2College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, UK
Abstract. We present a parameterisation of aerosol activation, including co-condensation of semi-volatile organics, for warm clouds that has applications in large-scale numerical models. The scheme is based on previously developed parameterisations that are in the literature, but has two main modifications. The first is that the total aerosol mass is modified by the condensation of organic vapours entering cloud base, whereas the second is that this addition of mass acts to modify the median diameter and the geometric standard deviation of the aerosol size distribution. It is found that the scheme is consistent with parcel model calculations of co-condensation under different regimes. Such a parameterisation may find use in evaluating important feedbacks in climate models.

Citation: Connolly, P. J., Topping, D. O., Malavelle, F., and McFiggans, G.: A parameterisation for the activation of cloud drops including the effects of semi-volatile organics, Atmos. Chem. Phys., 14, 2289-2302, https://doi.org/10.5194/acp-14-2289-2014, 2014.
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