China 264 sample cities AQI, CO and NO2 and O3, PM10 and PM2.5, SO2 data set

China has a vast territory, and different regions have different air quality conditions. The database selects the air quality of 264 major cities in China as the research object. From the Ministry of Ecology and Environment, PRC (http://www.mee.gov.cn/), China's air quality on-line monitoring and analysis platform https://www.aqistudy.cn/historydata/ for the 264 cities in 2018-2021 per hour AQI and CO, NO2 and O3, PM10 and PM2.5, The hourly monitoring concentration data of six pollutant items of SO2 (except for CO which is mg/m3 and the other units are ug/m3) are averaged over the 24 1-hour data every day to obtain the daily pollutant item concentration index and daily air quality index. All seven kinds of daily data sets of 264 cities from 2018 to 2021 were used as data samples for the study.

我国幅员辽阔，各地空气质量状况各异。本数据库选取了中国264个主要城市的空气质量作为研究对象。数据来源于中华人民共和国生态环境部（http://www.mee.gov.cn/）提供的空气质量在线监测与分析平台（https://www.aqistudy.cn/historydata/），涵盖2018年至2021年间264个城市每小时的AQI以及CO、NO2和O3、PM10和PM2.5等六种污染物的实时监测浓度数据。通过对每天24小时内的1小时数据平均值进行计算，得到每日污染物浓度指数和每日空气质量指数。2018年至2021年间264个城市所生成的七类每日数据集均被用作研究的数据样本。