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为什么下雪时天气暖

放大字体缩小字体发布日期:2008-03-07 浏览次数: 584
核心提示:又到冬天了,纷飞的白雪给大地披上银装。人们赏雪、玩雪不亦乐乎。但你没有注意过下雪的天气其实都不是太冷呢?下面就来为您解答这个疑惑。 Snowing does not cause the warmth, the relative warmth causes the snow. During very cold weather the capacity of the a


      又到冬天了,纷飞的白雪给大地披上银装。人们赏雪、玩雪不亦乐乎。但你没有注意过下雪的天气其实都不是太冷呢?下面就来为您解答这个疑惑。

      Snowing does not cause the warmth, the relative warmth causes the snow.

      During very cold weather the capacity of the air to contain moisture is greatly reduced. What water vapor remains is deposited as frost. At the same time, evaporation is reduced and therefore air humidity remains low. In these conditions snow cannot form.

      Warmer air can hold more moisture before the saturation point is reached and the water vapor begins to condense out. So when warmer air moves into cooler areas, not only do we feel the increase in temperature, but the excess vapor precipitates as snow.

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      关键词: 下雪 天气暖
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