灰霾“长”什么样?

从卫星图片上看,灰霾犹如一层脏兮兮的薄纱笼在上空,下面的地形隐约可见,朦朦胧胧,却怎么也看不清楚。云则是洁白的,会完全挡住下面的地形。

笼罩华北平原的灰霾

笼罩华北平原的灰霾

从地面上远距离观察被灰霾笼罩的城市,同样给人月朦胧鸟朦胧的感觉,但是是那种略为发灰、发黄,好像看得见却又看不清的感觉。和浓雾不同的是,在灰霾中近距离观察物体时是清楚的,只是稍远距离开始有一种挥之不去的朦胧,原因是颗粒物细粒子对可见光的散射影响。而浓雾时因为水滴粒径较大,对视线的阻挡是直接的。

灰霾笼罩下的城市

灰霾笼罩下的城市

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