Kudzotsa, I, Phillips, VTJ, Dobbie, S et al. (6 more authors) (2016) Aerosol indirect effects on glaciated clouds. Part I: Model description. Quarterly Journal of the Royal Meteorological Society, 142 (698). pp. 1958-1969. ISSN 0035-9009
Abstract
Various improvements were made to a state-of-the-art aerosol–cloud model and comparison of the model results with observations from field campaigns was performed. The strength of this aerosol–cloud model is in its ability to explicitly resolve all the known modes of heterogeneous cloud droplet activation and ice crystal nucleation. The model links cloud particle activation with the aerosol loading and chemistry of seven different aerosol species. These improvements to the model resulted in more accurate prediction especially of droplet and ice crystal number concentrations in the upper troposphere and enabled the model to directly sift the aerosol indirect effects based on the chemistry and concentration of the aerosols. In addition, continental and maritime cases were simulated for the purpose of validating the aerosol–cloud model and for investigating the critical microphysical and dynamical mechanisms of aerosol indirect effects from anthropogenic solute and solid aerosols, focusing mainly on glaciated clouds. The simulations showed that increased solute aerosols reduced cloud particle sizes by about 5 μm and inhibited warm rain processes. Cloud fractions and their optical thicknesses were increased quite substantially in both cases. Although liquid mixing ratios were boosted, there was however a substantial reduction of ice mixing ratios in the upper troposphere owing to the increase in snow production aloft. These results are detailed in the subsequent parts of this study.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 Royal Meteorological Society. This is the peer reviewed version of the following article:Kudzotsa, I, Phillips, VTJ, Dobbie, S, Formenton, M, Sun, J, Allen, G, Bansemer, A, Spracklen, D and Pringle, K (2016) Aerosol indirect effects on glaciated clouds. Part I: Model description. Quarterly Journal of the Royal Meteorological Society , which has been published in final form at http://dx.doi.org/10.1002/qj.2791. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Keywords: | aerosol-cloud interactions; cloud microphysics; cloud-resolving models; aerosols; aerosol indirect effects |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 May 2016 10:23 |
Last Modified: | 14 Apr 2017 03:24 |
Published Version: | http://dx.doi.org/10.1002/qj.2791 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/qj.2791 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99048 |