【摘要】 本文应用国家环保总局发布的城市空气质量日报的数据,研究了2001~2004年我国主要城市空气污染的时空分布特征。研究结果表明:我国城市空气污染的首要污染物主要是PM10;污染物的时空分布特征比较明显,城市空气污染冬春季节重于夏秋季节,北方城市重于南方城市;2001~2004年,北方大部份城市空气质量有明显改善。同时分析沙尘天气对我国城市空气质量的影响表明,我国北方城市尤其是西北城市,受沙尘天气的影响比较大,PM10污染相对严重。更多还原

【Abstract】 In this paper,spatial and temporal distribution characteristics of city ambient air pollution in China were summarized based on API data that were published by SEPA.The results indicated that,in China the main pollutant in city ambient air is PM₁₀,spatial and temporal distribution characteristics of city ambient air pollution are distinct,the pollution is more serious in winter and spring than summer and autumn while more serious in north cities than south cities.From 2001 to 2004,the city ambient air quality of the north China had been improved evidently.Review the influence of dust-sand weather indicated that the city ambient air quality in the north China especially in the northwest China was seriously influenced by dust-storms and PM₁₀ was the main pollutant in these areas.更多还原