雾霾,是雾和霾的组合词。雾霾常见于城市。中国不少地区将雾并入霾一起作为灾害性天气现象进行预警预报,统称为“雾霾天气”。雾霾是特定气候条件与人类活动相互作用的结果。高密度人口的经济及社会活动必然会排放大量细颗粒物(PM 2.5),一旦排放超过大气循环能力和承载度,细颗粒物浓度将持续积聚,此时如果受静稳 Smog is a combination of fog and haze. Haze is common in cities. In many areas of China, haze will be incorporated into the haze as an early warning and forecast of disastrous weather phenomena, collectively referred to as “hazy weather”. Haze is the result of the interaction of specific climatic conditions with human activity. High density population economic and social activities will inevitably emit large amounts of fine particulate matter (PM 2.5), once the emissions exceed the atmospheric circulation capacity and bearing capacity, the concentration of fine particles will continue to accumulate, at this time if the static