The growth of ice crystals in a supercooled water cloud
B. J. Mason
Abstract
B. J. Mason
Abstract
Abstract Equations are derived for the growth rate of ice crystals in the form of thin plates and prismatic columns suspended in a supercooled water cloud of given temperature. The effect of the fall motion of the crystal on its development is discussed ‐ in particular a criterion is derived for the transition from polyhedral to dendritic growth. Ice crystals grown in supercooled water clouds produced in large cold chambers reveal a double change of habit in the temperature range 0°C to −40°C. Experimental determinations of the growth rates of plate crystals growing at −2.5°C and prisms at −5°C are in fairly good agreement with the theory.
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Abstract Equations are derived for the growth rate of ice crystals in the form of thin plates and prismatic columns suspended in a supercooled water cloud of given temperature. The effect of the fall motion of the crystal on its development is discussed ‐ in particular a criterion is derived for the transition from polyhedral to dendritic growth. Ice crystals grown in supercooled water clouds produced in large cold chambers reveal a double change of habit in the temperature range 0°C to −40°C. Experimental determinations of the growth rates of plate crystals growing at −2.5°C and prisms at −5°C are in fairly good agreement with the theory.
Key concepts: Supercooling, Ice crystals, Clear ice, Growth rate, Materials science, Crystal growth, Atmospheric temperature range, Ice formation