南京市大气质量的变化趋势与年内变化特征分析

Analysis on theTrend and Characteristics of Air Quality in Nanjing

以南京市为研究区域,基于2013~2017年的南京空气质量数据,进行了秩相关系数分析和TOPSIS分析,总结了南京市大气质量的变化趋势与年内变化特征。结果表明:近年来南京市大部分污染物指数呈显著下降趋势,大气质量总体状况逐渐好转;年内大气质量变化受到气候因素影响,春夏季质量较高,而秋冬季较差。南京市近年来发展绿色经济,重视环境保护,研究结果也验证了南京市大气污染防治举措的有效性。

Rank correlation coefficient analysis and TOPSIS analysis method were applied to examine the trend and variation characteristics of air quality in a year in Nanjing City in this paper based on air quality data from 2013 to 2017 downloaded from the website of weather report. Results showed that since 2013 the indicators of most atmos- pheric pollutants in Nanjing have decreased significantly, and the overall air quality has improved gradually. The air quality of Nanjing was affected partially by climatic factors such as precipitation variation during the year, resulting in a higher quality in the spring and the summer but a lower quality in the autumn and the winter. In the last few years, the municipal government of Nanjing has advocated green economy and paid more attention to environmental protec- tion. Our study verified the effectiveness of Nanjing＇s air pollution control measures.