Ice Accretion, London Road, St. John's
Ice accretion occurs when liquid rain or drizzle, falling from an upper level warm air layer at temperature (T) > 0°C, falls into a low level air layer at T < 0°C and comes in contact with a surface or object whose temperature is below the freezing point. Under these conditions a layer of clear ice accumulates to a thickness that depends upon the intensity of the precipitation, its duration and the prevailing wind speed.

Reproduced by permission of Colin Banfield. ©1995.