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  • About us
    About the Department
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    How to find us
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  • Faculty
    Fulltime faculty
  • Research
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    Laboratory for Climate and Ocean-Atmosphere Studies
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    PKU AOS – Harvard EPS Climate and Environment Collaborative (CEC)
  • Education
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    Distinguished Lectures
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雾凇奇景

发布时间:2017-07-23
 

      

      

  张世彦摄于吉林。

  雾凇是一种附着于地面物体(如树枝、电线)上的白色或乳白色不透明冰层。由于雾凇中颗粒间空隙很多,因此雾凇呈完全不透明的白色。雾凇轻盈洁白,附着在树木物体上,宛如琼树银花,清秀雅致,又称树挂。

  雾凇按照形成过程分两种。一种是过冷却雾滴碰到冷的地面物体后迅速冻结成粒状的小冰块,叫粒状雾凇(或硬凇),它的结构较为紧密。另一种是由水汽直接凝华而形成的晶状雾凇(或软凇),结构较松散,稍有震动就会脱落。

  吉林雾凇发生于吉林市松花湖丰满大坝的下游沿岸地区。是东北寒冷的气候条件和较温暖的江水互相作用,由潮湿的蒸发雾直接冻附在堤岸边的冷树枝类物体表面,形成的美丽现象。吉林雾凇仪态万方、独具丰韵,每当雾凇来临,吉林松花江岸十里长堤“忽如一夜春风来,千树万树梨花开”,柳树结银花,松树绽银菊,把人们带进如诗如画的仙境。

   

   

  

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