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大气能见度

分类: 气象
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大气能见度是反映大气透明度的一个指标，一般定义为具有正常视力的人在当时的天气条件下还能够看清楚目标轮廓的最大地面水平距离，是一个对航空、航海、陆上交通以及军事活动等都有重要影响的气象要素。

影响能见度的因子主要有大气透明度、灯光强度和视觉感阈。大气能见度和当时的天气情况密切相关。当出现降雨、雾、霾、沙尘暴等天气过程时，大气透明度较低， 因此能见度较差。


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