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Fav十万个为什么
为什么人工降雨需要催化剂？
人工降雨需要催化剂主要是由于促进水汽凝结、增加冰晶密度以及提高降水效率共同作用的结果。
1、促进水汽凝结。催化剂如碘化银、干冰等能够为水汽提供凝结核，使水汽在云中快速凝结成水滴或冰晶，从而形成降雨。
2、增加冰晶密度。在冷云中，催化剂能够引发大量冰晶的形成，这些冰晶通过凝华增长，使云层中的冰晶密度增加，从而促进降水的形成。
3、提高降水效率。催化剂通过改变云层中水滴或冰晶的分布，加速水滴的合并和冰晶的聚集，使云层中的降水潜力得到更充分的释放，从而提高降雨效率。
总结：人工降雨需要催化剂，是由于促进水汽凝结、增加冰晶密度以及提高降水效率共同作用的结果。
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