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龙年岁末蛇年初,我国中东部地区雾霾沉沉;PM2.5、光化学烟雾等专业术语就像苏丹红、三聚氰胺、塑化剂一样不胫而走。但你是否知道,它们究竟是怎么一回事?雾和霾雾是指因悬浮在大气中的水汽凝结而使能见度低于1千米的天气现象,当能见度在1千米至10千米之间时,称为霭或轻雾;大雾天气的能见度通常不足200米。因为由液态水或冰晶组成的雾所散射的光与波长关系不大,所以,雾看起来呈乳白色或青白色。
Year of the Dragon At the beginning of the year, the fog in the central and eastern regions of China was heavy; PM2.5, photochemical smog, and other technical terms were just like Sudan Red, melamine, and plasticizers. But do you know exactly what they are all about? Fog and haze are weather phenomena with a visibility of less than 1 kilometer caused by the condensation of water vapour suspended in the atmosphere, with visibility of 1 to 10 kilometers. Occasionally, it is referred to as haze or haze; Visibility in foggy weather is usually less than 200 meters. Because the light scattered by the mist composed of liquid water or ice crystals has little relation with the wavelength, the fog appears milky or bluish-white.