WEI Shimin,FENG Xinyuan,ZHANG Zhengzi.Temporal and Spatial Distribution Characteristics of Air Quality in Urban Agglomeration of Sichuan Basin[J].Journal of Chengdu University of Information Technology,2021,36(01):110-117.[doi:10.16836/j.cnki.jcuit.2021.01.017]
四川盆地城市群环境空气质量时空分布特征
- Title:
- Temporal and Spatial Distribution Characteristics of Air Quality in Urban Agglomeration of Sichuan Basin
- 文章编号:
- 2096-1618(2021)01-0110-08
- Keywords:
- ambient air quality; AQI; primary pollutants; temporal and spatial distribution; urban agglomerations of Sichuan Basin
- 分类号:
- X513
- 文献标志码:
- A
- 摘要:
- 利用2015-2018年四川盆地18个城市空气质量指数(AQI)以及6种大气污染物质量浓度的逐时监测资料,对四川盆地城市群空气质量状况以及AQI和污染物质量浓度的时空分布特征进行分析。结果表明:2015-2018年四川盆地环境空气质量总体趋于好转,AQI呈逐年减小的趋势,但冬季仍不容乐观。空气质量季节变化明显,冬季AQI最高,污染天数出现频率高,秋季AQI最低,出现污染天数相对较少。AQI高值区集中在盆地西部和南部地区,以自贡和成都为高值中心,低值区主要在盆地东北部地区。四川盆地首要污染物以PM2.5、O3、PM10为主,以PM2.5、PM10为首要污染物出现的频率逐年减少,而以O3为首要污染物出现的频率逐年增加,光化学污染正在成为盆地重要的污染形式。主要污染物质量浓度具有明显的季节变化,不同污染物其质量浓度的季节变化和空间分布存在差异。
- Abstract:
- Based on the air quality index(AQI)and the monitoring data of the mass concentration of six air pollutants in 18 cities of Sichuan Basin during 2015-2018, the temporal and spatial distribution characteristics of the air quality status, AQI and pollutants mass concentration were analyzed in urban agglomerations of Sichuan Basin. Results indicate that the ambient air quality in the Sichuan Basin has generally improved, and the AQI has been decreasing year by year, but the air quality is still poor in winter from 2015 to 2018. The seasonal variation of air quality is obvious, with the highest AQI in winter, high frequency of pollution days, and the lowest AQI in autumn, with relatively few pollution days. The high-value areas of AQI are concentrated in the western and southern areas of the basin, with Zigong and Chengdu as the high-value centers, and the low-value areas are mainly in the northeast of the basin. The primary pollutants in the Sichuan Basin are mainly PM2.5,O3 and PM10. However, the frequency of PM2.5 and PM10 as the primary pollutant are decreasing year by year, and the frequency of O3 as the primary pollutant is increasing year by year. Therefore, photochemical pollution is becoming an important form of pollution in the basin. The concentration of the major pollutants has obvious seasonal variation, and the seasonal variation and spatial distribution of mass concentration of different pollutants are different.
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备注/Memo
收稿日期:2019-12-26
基金项目:国家自然科学基金资助项目(41775147); 国家自然科学基金重大研究计划资助项目(91644226); 四川省科技计划资助项目(2019YJ0362)