Abstract
AbstractThe effects of rimer surface temperature and environment temperature on spike production as supercooled water droplets are accreted by an ice surface immersed in a liquid bath have been investigated.When the rimer surface temperature and the environment temperature were the same, spikes were produced only in the temperature range −3° to −9 °C. However, when they were varied independently it was found that the upper temperature limit for spike production of −3 °C is controlled more by the rimer surface temperature, provided that the environmental temperature is at or below −3 °C. By contrast, the low temperature cut‐off for spike production at −9 °C is almost independent of the rimer surface temperature and is controlled more by the environmental temperature.If applicable, this could suggest that the Hallett‐Mossop process will not be displaced to lower temperatures when rapid riming of hailstones occurs in clouds with high liquid water contents.
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