On the dispersion of the sizes of droplets growing by condensation in turbulent clouds
Article first published online: 14 DEC 2006
Copyright © 1972 Royal Meteorological Society
Quarterly Journal of the Royal Meteorological Society
Volume 98, Issue 415, pages 150–164, January 1972
How to Cite
Bartlett, J. T. and Jonas, P. R. (1972), On the dispersion of the sizes of droplets growing by condensation in turbulent clouds. Q.J.R. Meteorol. Soc., 98: 150–164. doi: 10.1002/qj.49709841512
- Issue published online: 14 DEC 2006
- Article first published online: 14 DEC 2006
- Manuscript Revised: 3 AUG 1971
- Manuscript Received: 26 APR 1971
The effect of turbulence within a cloud on the distribution of the sizes of droplets growing by condensation has been examined in some detail with the aid of a scheme for simulating a fluctuating updraught numerically. It is found that, contrary to the conclusions previously reached by some Russian and Chinese workers, the spread in the radii of droplets at any given level which this mechanism produces is very small (generally < 0.2 γm). This result agrees with the conclusion of a similar analysis carried out by Warner.
Other factors which may account for the observed distributions of droplet sizes have been considered and the most important appear to be mixing between a cloud and its environment and the variable composition of condensation nuclei. It also appears that the absorption of organic surface active substances on to some condensation nuclei probably accounts for the existence of small droplets in the interiors of well-developed clouds.