Aircraft measurements of wave clouds 1Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, UK
29 Oct 2012
2National Centre for Atmospheric Science, UK
3Centre for Atmospheric Science, SEAES, University of Manchester, UK
Received: 06 March 2012 – Published in Atmos. Chem. Phys. Discuss.: 29 May 2012 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. The measurements presented
here and in previous recent studies suggest a different interaction
of dynamics and microphysics in wave clouds from the accepted model.
The results in this paper provide a case for future numerical
simulation of wave cloud and the interaction between wave and cloud.
Revised: 25 September 2012 – Accepted: 10 October 2012 – Published: 29 October 2012
Citation: Cui, Z., Blyth, A. M., Bower, K. N., Crosier, J., and Choularton, T.: Aircraft measurements of wave clouds, Atmos. Chem. Phys., 12, 9881-9892, doi:10.5194/acp-12-9881-2012, 2012.