天气预报 > 自然 > 乌云是怎么形成的呢
乌云是怎么形成的呢
更新时间: 2021-02-01 16:42:35  

1、由雾滴凝结而成。地表水在烈日下迅速蒸发,使空气湿度越来越大;高空的温度低于地表温度,水蒸气在高空到达饱和状态和过饱和状态;

2、高空有灰尘,成为凝聚中心,使饱和蒸汽和过饱和蒸汽凝成细小的雾滴;雾滴足够密集时就成为白云;雾滴越来越大,白云就变成为乌云。

关键词: 乌云 怎么 形成

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