Ice needle

Alternative definitions (2), class: vernacular (0)
Term: Ice needle
Definition: A long, thin ice crystal, axis coincident with the c axis of ice and with the cross section perpendicular to its long dimension being, at least in part, hexagonal. Ice needles grow in a narrow range of temperature near -4C and also at much lower temperatures, below -25 to -50C depending on ice supersaturation.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary