Growth Kinetics of Ice Single Crystal from Vapour Phase and Variation of its Growth Form

[摘要] First we briefly review the experimental studies on growth forms and mechanisms of ice crystals from the vapour, i.e. snow crystals. Then we discuss why the basic habit of ice alternate three times with decreasing temperature: from plates (A) to columns (B) at -4°C, to plates (C) at -10°C, and to columns (D) at -20°C∼-35°C. The surface of ice just below 0°C is covered with a quasi liquid layer, whose thickness or coverage 9 decreases with falling temperature, and therefore the growth mechanism of a crystal face changes also as follows: I) Vapour-Quasi Liquid-Solid-Mechanism (∂<1), II) Adhesive Growth on a surface strongly adsorbed by H2O molecules themselves (0.02<∂

[学科分类] 大气科学