Kudzotsa, I, Phillips, VTJ and Dobbie, S (2016) Aerosol Indirect Effects on Glaciated Clouds. Part II: Sensitivity Tests Using Solute Aerosols. Quarterly Journal of the Royal Meteorological Society, 142 (698 A). pp. 1970-1981. ISSN 0035-9009
Abstract
Sensitivity tests were performed on a midlatitude continental case using a state-of-the-art aerosol–cloud model to determine the salient mechanisms of aerosol indirect effects (AIE) from solute aerosols. The simulations showed that increased solute aerosols doubled cloud-droplet number concentrations and hence reduced cloud particle sizes by about 20% and consequently inhibited warm rain processes, thus enhancing the chances of homogeneous freezing of cloud droplets and aerosols. Cloud fractions and their optical thicknesses increased quite substantially with increasing solute aerosols. 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. The predicted total aerosol indirect effect was equal to −9.46 ± 1.4 W m−2. The AIEs of glaciated clouds (−6.33 ± 0.95 W m−2) were greater than those of water-only clouds (−3.13 ± 0.47 W m−2) by a factor of two in this continental case. The higher radiative importance of glaciated clouds compared with water-only clouds emerged from their larger collective spatial extent and their existence above water-only clouds. In addition to the traditional AIEs (glaciation, riming and thermodynamic), the new AIEs sedimentation, aggregation and coalescence were identified.
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 and Dobbie, S (2016) Aerosol Indirect Effects on Glaciated Clouds. Part II: Sensitivity Tests Using Solute Aerosols. Quarterly Journal of the Royal Meteorological Society, which has been published in final form at http://dx.doi.org/10.1002/qj.2790. 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; glaciated clouds; indirect effects; clouds; CLASIC |
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 10:06 |
Last Modified: | 14 Apr 2017 03:24 |
Published Version: | https://dx.doi.org/10.1002/qj.2790 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/qj.2790 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99050 |