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2006年新年伊始,大雾在我国各地的天气现象中扮演着重要角色——1月15日东北、华北的大雾使能见度仅10米,京沈高速60余辆车连环碰撞,致使2人死亡、29人受伤;东南沿海的珠海,市民们则在这两天欣赏着“人间仙境”的雾中珠海的美景。那么,雾究竟是怎么形成的,对我们的生活带来什么样的影响呢?什么是雾?在水汽充足、微风及大气层稳定的情况下,如果接近地面的空气冷却至某程度时,空气中的水汽便会凝结成悬浮于近地面层中的大量微小水滴或冰晶,使水平能见度降低,这样的现象就称之为雾。由于组成雾的水滴或冰晶(合称为雾粒)对可见光的散射作用,所以,雾中的能见度会显著减小。雾的分类及形成1.按照能见度的高低来划分:雾中水平能见度小
At the beginning of the new year in 2006, heavy fog played an important role in the weather phenomena in various parts of China. On January 15, the fog of northeast and north China made the visibility only 10 meters. More than 60 vehicles of Beijing-Shenyang Expressway collided and caused 2 deaths , 29 were injured; Zhuhai in the southeast coast, the citizens are in these two days to enjoy the beauty of “fairyland” fog in Zhuhai. So what exactly is the formation of the fog and what effect it has on our lives? What is the fog? In the case of sufficient water vapor, breeze and stable atmosphere, if the air close to the ground cools to a certain extent, Of the water vapor will condense into a large number of tiny water droplets or ice crystals suspended in the near-surface layer, so that the level of visibility decreases, a phenomenon called fog. Visibility in the fog can be significantly reduced due to the scattering of visible light by water droplets or ice crystals (collectively fog particles) that make up the fog. Fog classification and formation 1. According to the level of visibility to the division: the level of fog visibility