Aircraft measurements of wave clouds

Cui, Z.; Blyth, A. M.; Bower, K. N.; Crosier, J.; Choularton, T.

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.

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Cui, Z. / Blyth, A. M. / Bower, K. N. / et al: Aircraft measurements of wave clouds. 2012. Copernicus Publications.

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