{"title":"Spatiotemporal variation characteristics and influencing factors of air quality in Sichuan-Chongqing region, China, 2016–2020","authors":"Zheng Zhang, Xiaoai Dai, Zhiqiang Xie, Chen Yu, Ziyin Liao, Jingzhong Li, Fengshan Jiang, Yun Liu, Zheyan Liu, Quan Zhang, Weile Li","doi":"10.1007/s12665-025-12117-3","DOIUrl":null,"url":null,"abstract":"<p>With the acceleration of urbanization and rapid economic development in the Sichuan-Chongqing region, air pollution has become an increasingly evident problem. Based on hourly air quality index (AQI) concentration data from 2016 to 2020, this study used statistical and interpolation analysis methods to explore the spatiotemporal variation characteristics of AQI in the Sichuan-Chongqing region at annual, seasonal, and monthly time scales. Moran’s I Index and hot spot analysis characterized the spatial agglomeration of AQI and air pollutants. The main results are as follows: (1) From 2016 to 2020, the annual average AQI value in the Sichuan-Chongqing region decreased, and the air quality improved significantly. The characteristics of seasonal and monthly variation of air quality are obvious. The spatial distribution shows the characteristics of “better in west and north, worse in east and south”, which highly coincides with the difference in terrain characteristics in the region (2) In 2018, AQI, PM<sub>2.5</sub>, PM<sub>10,</sub> SO<sub>2</sub>, NO<sub>2</sub>, O<sub>3</sub>, and CO showed clear spatial dependence, and each air pollutant showed regional differences in the distribution of hot spots. (3) The air quality in Sichuan-Chongqing region is affected by both natural factors and social and economic factors, but the influence of natural factors is more significant. The research results provide a scientific and theoretical basis for air pollution governance and ecological civilization construction in the Sichuan-Chongqing region.</p>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 4","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Earth Sciences","FirstCategoryId":"93","ListUrlMain":"https://link.springer.com/article/10.1007/s12665-025-12117-3","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
With the acceleration of urbanization and rapid economic development in the Sichuan-Chongqing region, air pollution has become an increasingly evident problem. Based on hourly air quality index (AQI) concentration data from 2016 to 2020, this study used statistical and interpolation analysis methods to explore the spatiotemporal variation characteristics of AQI in the Sichuan-Chongqing region at annual, seasonal, and monthly time scales. Moran’s I Index and hot spot analysis characterized the spatial agglomeration of AQI and air pollutants. The main results are as follows: (1) From 2016 to 2020, the annual average AQI value in the Sichuan-Chongqing region decreased, and the air quality improved significantly. The characteristics of seasonal and monthly variation of air quality are obvious. The spatial distribution shows the characteristics of “better in west and north, worse in east and south”, which highly coincides with the difference in terrain characteristics in the region (2) In 2018, AQI, PM2.5, PM10, SO2, NO2, O3, and CO showed clear spatial dependence, and each air pollutant showed regional differences in the distribution of hot spots. (3) The air quality in Sichuan-Chongqing region is affected by both natural factors and social and economic factors, but the influence of natural factors is more significant. The research results provide a scientific and theoretical basis for air pollution governance and ecological civilization construction in the Sichuan-Chongqing region.
期刊介绍：
Environmental Earth Sciences is an international multidisciplinary journal concerned with all aspects of interaction between humans, natural resources, ecosystems, special climates or unique geographic zones, and the earth:
Water and soil contamination caused by waste management and disposal practices
Environmental problems associated with transportation by land, air, or water
Geological processes that may impact biosystems or humans
Man-made or naturally occurring geological or hydrological hazards
Environmental problems associated with the recovery of materials from the earth
Environmental problems caused by extraction of minerals, coal, and ores, as well as oil and gas, water and alternative energy sources
Environmental impacts of exploration and recultivation – Environmental impacts of hazardous materials
Management of environmental data and information in data banks and information systems
Dissemination of knowledge on techniques, methods, approaches and experiences to improve and remediate the environment
In pursuit of these topics, the geoscientific disciplines are invited to contribute their knowledge and experience. Major disciplines include: hydrogeology, hydrochemistry, geochemistry, geophysics, engineering geology, remediation science, natural resources management, environmental climatology and biota, environmental geography, soil science and geomicrobiology.
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