A Complete Collection of 100000 Whys
Fav十万个为什么
为什么沙漠夜晚会结霜？
简单的摘要：沙漠夜晚会结霜，主要是由于昼夜温差大、空气湿度降低以及地表辐射冷却。
1、昼夜温差大：沙漠地区白天温度高，夜晚温度骤降，昼夜温差可达数十摄氏度，为霜的形成提供了必要的温度条件。
2、空气湿度降低：沙漠地区空气干燥，但夜间温度下降会导致空气中少量水蒸气凝结，当温度低于露点且达到霜点时，水蒸气直接凝华成霜。
3、地表辐射冷却：沙漠地表白天吸收大量太阳辐射，夜晚通过辐射将热量快速散失到大气中，导致地表温度迅速下降，为霜的形成提供了冷凝核。
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