Spatiotemporal Relationships between Air Quality and Multiple Meteorological Parameters in 221 Chinese Cities

	Spatiotemporal Relationships between Air Quality and Multiple Meteorological Parameters in 221 Chinese Cities
	Ji, Mengyi; Jiang, Yuying; Han, Xiping; Liu, Luo; Xu, Xinliang; Qiao, Zhi; Sun, Wei
刊名	COMPLEXITY
	2020
卷号	2020
英文摘要	Air quality in China is characterized by significant spatial and temporal differences, which are directly related to local meteorological conditions. This study used air quality monitoring data, namely, the air pollution index (API) and air quality index (AQI) between 2005 and 2018, together with meteorological data and identified key meteorological factors that affected the spatial and temporal variation of air quality using a random forest algorithm. The spatial and temporal differences in the threshold values of different meteorological factors affecting the concentrations of PM2.5, PM10, SO2, CO, NO2, and O(3)were identified. The AQI has the advantages of facilitating higher index values than the API. The air quality showed an improvement from 2005 to 2018. Wind direction and precipitation were the most important meteorological factors affecting the air quality in northern and southern China, respectively, which to some extent reflected the causes and degradation mechanisms of air pollution in the two regions. There were significant spatial and temporal differences in the effects of meteorological factors on the concentrations of different pollutants. The influence of atmospheric pressure on pollutant concentration differed between the east and west. Precipitation and relative humidity in most cities had significant impacts on PM(2.5)and PM10. The influence of relative humidity was most significant for SO(2)and it also had a great influence on O-3, while wind speed had a great influence on NO2. The results of the study confirm the meteorological sensitivity of air quality and provide support for the implementation of regional air pollution prevention and control initiatives.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20177]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Ji, Mengyi,Jiang, Yuying,Han, Xiping,et al. Spatiotemporal Relationships between Air Quality and Multiple Meteorological Parameters in 221 Chinese Cities[J]. COMPLEXITY,2020,2020.
APA	Ji, Mengyi.,Jiang, Yuying.,Han, Xiping.,Liu, Luo.,Xu, Xinliang.,...&Sun, Wei.(2020).Spatiotemporal Relationships between Air Quality and Multiple Meteorological Parameters in 221 Chinese Cities.COMPLEXITY,2020.
MLA	Ji, Mengyi,et al."Spatiotemporal Relationships between Air Quality and Multiple Meteorological Parameters in 221 Chinese Cities".COMPLEXITY 2020(2020).