城市尾羽层，也称城市尾烟气层，位于城市的下风向，这一层中的气流、污染物、云、雾、降水和气温等都受城市下垫面及边界层的影响 Located downwind of the city, the air flow in this layer, the pollutants, clouds, fog, precipitation and temperature are all affected urban surface and boundary layer.
Methane is further involved in selected chemical reactions in the urban plume relevant in photochemical smog.
by haosifeng January 10, 2015