Atmos. Chem. Phys. Discuss., 12, 13337-13362, 2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
Aircraft measurements of wave cloud
Z. Cui1, A. M. Blyth1,2, K. N. Bower3, J. Crosier2,3, and T. Choularton3
1Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, UK
2National Centre for Atmospheric Science, UK
3Centre for Atmospheric Science, SEAES, University of Manchester, UK

Abstract. In this paper, aircraft measurements are presented of liquid phase (ice-free) wave clouds made at temperatures greater than −5 °C that formed over Scotland, UK. The horizontal variations of the vertical velocity across wave clouds display a distinct pattern. The maximum updraughts occur at the upshear flanks of the clouds and the strong downdraughts at the downshear flanks. The cloud droplet concentrations were a couple of hundreds per cubic centimetres, and the drops generally had a mean diameter between 15–45 μm. A small proportion of the drops were drizzle. A new definition of a mountain-wave cloud is given, based on the measurements presented here and previous studies. The results in this paper provide a case for future numerical simulation of wave cloud and the interaction between wave and clouds.

Citation: Cui, Z., Blyth, A. M., Bower, K. N., Crosier, J., and Choularton, T.: Aircraft measurements of wave cloud, Atmos. Chem. Phys. Discuss., 12, 13337-13362, doi:10.5194/acpd-12-13337-2012, 2012.
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