The production of secondary ice particles during riming

✍ Scribed by S. C. Mossop; J. L. Brownscombe; G. J. Collins

• Publisher: John Wiley and Sons
• Year: 1974
• Tongue: English
• Weight: 972 KB
• Volume: 100
• Category: Article
• ISSN: 0035-9009
• DOI: 10.1002/qj.49710042514

✦ Synopsis

Abstract

Two series of experiments were undertaken to investigate whether secondary ice particles are thrown off during the accretion of supercooled water drops upon an ice surface. Riming took place in cloud at a temperature of about −9°C, and the accreted droplets were of various diameters up to 100 μm. Drops were accreted upon targets moving at velocities from 0·15 to 2·1 m s^−1^. The number of secondary ice particles produced per unit mass of rime appears to be far too low to account for the high concentrations of ice particles observed in some natural clouds.Footnote added in proof. Subsequent work by J. Hallett and S. C. Mossop (Nature, 1974, 249, pp. 26‐27) has shown that high concentration of secondary ice particles can be produced by riming under certain special conditions.