Tropospheric fallout occurs when the finer particles enter the troposphere, and it spreads over a larger area in the month after the explosion.
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美
- 对流层沈降是在较细粒子进入对流层后,随后在较大面积沈降,一般说来,对流层沈降发生于爆炸后一个月内在爆炸地点的周围地区出现;