我国主要城市大气环境质量对比分析

Comparison Study on Air Quality in Major Cities of China

根据《中国环境报》重点城市大气质量周报资料，得出我国城市大气环境质量呈现出冬季劣于夏季的时间变化规律以及西北内陆劣于东部沿海的区域变化规律，由于污染源、气象、地形等因素的差异，不同城市大气污染中Nox、TSP、SO2的贡献率也不尽相同。

Based on Air Quality Weekly Report in major cities of China, several conclusions can be drawn:1)In winter the air quality is worse than that in summer;2)From the south-east of China to the north-west of China the air quality in major cities gets worse and worse;3)TSP is the most important contaminant in cities,but in some cities,NO X is the dominant pollutant,such as Shanghai,Shenzhen,Guangzhou,Hefei,Wuhan,Beijin and Zhuhai.In Chongqin,Guiyang,Qindao and Changsha,the dominant pollutant is SO 2.