Spatio-Temporal Changes in Air Quality of the Urban Area of Chongqing from 2015 to 2021 Based on a Missing-Data-Filled Dataset | |
Zhang, Huayu3; Nie, Yong3; Deng, Qian2,3; Liu, Yaqin3; Lyu, Qiyuan3; Zhang, Bo1,3 | |
刊名 | ATMOSPHERE |
2022-09-01 | |
卷号 | 13期号:9页码:16 |
关键词 | air pollution AQI environmental protection missing data interpolation air pollutant |
ISSN号 | 2073-4433 |
DOI | 10.3390/atmos13091473 |
英文摘要 | Air pollution is one of the severe environmental issues in Chongqing. Many measures made by the government for improving air quality have been put into use these past few years, while the influence of these measures remains unknown. This study analyzed the changes in the air quality of the urban area of Chongqing between 2015 and 2021 using a complete in situ observation dataset that all missing data were filled by the interpolation of a low-rank tensor completion model with truncate nuclear norm minimization (LRTC-TNN). The results include: (1) the LRTC-TNN model robustly performs to reconstruct missing data of pollutant concentrations with an R-2 of 0.93 and an RMSE of 7.78; (2) the air quality index (AQI) decreases by 15.96%, and the total polluted days decrease by 21.05% from 2015 to 2021, showing an obvious promotion in air quality; and (3) the changing air quality is attributed to decreasing concentrations of PM2.5 (34.10%), PM10 (25.03%), and NO2 (5.53%) from 2015 to 2021, whereas an increasing concentration of O-3 (10.49%) is observed. The processing method for missing data, intact AQI datasets, and analysis of changes are beneficial to policy-making for environmental improvement and fill the gap in the field of data interpolation for air quality datasets in mountainous areas. |
资助项目 | National Natural Science Foundation of China[42171086] ; National Natural Science Foundation of China[41971153] ; International Science and Technology Cooperation Program of China[2018YFE0100100] ; Chinese Academy of Sciences Light ofWest China |
WOS关键词 | MATRIX COMPLETION ; POLLUTION ; OZONE |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | MDPI |
WOS记录号 | WOS:000858033100001 |
资助机构 | National Natural Science Foundation of China ; International Science and Technology Cooperation Program of China ; Chinese Academy of Sciences Light ofWest China |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/56844] |
专题 | 成都山地灾害与环境研究所_数字山地与遥感应用中心 |
通讯作者 | Nie, Yong |
作者单位 | 1.Southwest Jiao Tong Univ, Fac Geosci & Environm Engn, Chengdu 611756, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610299, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Huayu,Nie, Yong,Deng, Qian,et al. Spatio-Temporal Changes in Air Quality of the Urban Area of Chongqing from 2015 to 2021 Based on a Missing-Data-Filled Dataset[J]. ATMOSPHERE,2022,13(9):16. |
APA | Zhang, Huayu,Nie, Yong,Deng, Qian,Liu, Yaqin,Lyu, Qiyuan,&Zhang, Bo.(2022).Spatio-Temporal Changes in Air Quality of the Urban Area of Chongqing from 2015 to 2021 Based on a Missing-Data-Filled Dataset.ATMOSPHERE,13(9),16. |
MLA | Zhang, Huayu,et al."Spatio-Temporal Changes in Air Quality of the Urban Area of Chongqing from 2015 to 2021 Based on a Missing-Data-Filled Dataset".ATMOSPHERE 13.9(2022):16. |
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