冰晶效应 在有冰晶和过冷却水滴共存的云中,由于冰面的饱和水汽压比过冷却水面的饱和水汽压小,当空气中的实有水汽压介于两者之间,即大于冰面饱和水汽压而又小于水面饱和水汽压时,过冷却水滴会因蒸发而减小,水分子不断由水滴向冰晶上转移,冰晶则因凝华而增大(如附图)。
显然,飞机穿过云层与“云种散播效应”类似,在空中形成的冰晶会导致降雨。
Apparently the effects of jet planes punching through clouds are similar to "cloud seeding" operations, where ice crystals are created in the atmosphere to make it rain.
当冰晶完全排列成线形时,反射阳光就会形成光柱效应。
Sunlight reflects off crystals that are properly aligned, creating the sun-pillar effect.
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