{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T21:07:51Z","timestamp":1768079271815,"version":"3.49.0"},"reference-count":45,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,4,4]],"date-time":"2022-04-04T00:00:00Z","timestamp":1649030400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100012456","name":"National Social Science Fund of China","doi-asserted-by":"publisher","award":["20XSH015"],"award-info":[{"award-number":["20XSH015"]}],"id":[{"id":"10.13039\/501100012456","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Science and Technology Research Project of Chongqing Municipal Education Commission","award":["KJQN202100831"],"award-info":[{"award-number":["KJQN202100831"]}]},{"name":"Start-up Foundation of High-level Talents  in Chongqing Technology and Business University.","award":["2056014"],"award-info":[{"award-number":["2056014"]}]},{"DOI":"10.13039\/501100004608","name":"Natural Science Foundation of Jiangsu Province","doi-asserted-by":"publisher","award":["BK20210933"],"award-info":[{"award-number":["BK20210933"]}],"id":[{"id":"10.13039\/501100004608","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>In order to study the temporal and spatial distribution characteristics of atmospheric pollutants in cities (districts and counties) in the Chengdu\u2013Chongqing Twin-city Economic Circle (CCEC) and to provide a theoretical basis for atmospheric pollution prevention and control, this paper combined Ambient Air Quality Standards (AAQS) and WHO Global Air Quality Guidelines (GAQG) to evaluate atmospheric pollution and used spatial correlation to determine key pollution areas. The results showed that the distribution of atmospheric pollutants in CCEC presents a certain law, which was consistent with the air pollution transmission channels. Except for particulate matter with an aerodynamic diameter equal to or less than 2.5 \u03bcm (PM2.5) and ozone (O3), other pollutants reached Grade II of AAQS in 2020, among which particulate matter with an aerodynamic diameter equal to or less than 10 \u03bcm (PM10), PM2.5, sulfur dioxide (SO2), nitrogen dioxide (NO2) and carbon monoxide (CO) have improved. Compared with the air quality guidelines given in the GAQG, PM10, PM2.5, NO2 and O3 have certain effects on human health. The spatial aggregation of PM10 and PM2.5 decreased year by year, while the spatial aggregation of O3 increased with the change in time, and the distribution of NO2 pollution had no obvious aggregation. Comprehensive analysis showed that the pollution problems of particulate matter, NO2 and O3 in CCEC need to be further controlled.<\/jats:p>","DOI":"10.3390\/ijerph19074333","type":"journal-article","created":{"date-parts":[[2022,4,4]],"date-time":"2022-04-04T09:49:41Z","timestamp":1649065781000},"page":"4333","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Temporal and Spatial Distribution Analysis of Atmospheric Pollutants in Chengdu\u2013Chongqing Twin-City Economic Circle"],"prefix":"10.3390","volume":"19","author":[{"given":"Ning","family":"Qi","sequence":"first","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuemei","family":"Tan","sequence":"additional","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tengfei","family":"Wu","sequence":"additional","affiliation":[{"name":"Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qing","family":"Tang","sequence":"additional","affiliation":[{"name":"Chongqing Fushide Environmental Affairs Co., Ltd., Chongqing 401147, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fengshou","family":"Ning","sequence":"additional","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Debin","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tengtun","family":"Xu","sequence":"additional","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hong","family":"Wu","sequence":"additional","affiliation":[{"name":"School of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lingxiao","family":"Ren","sequence":"additional","affiliation":[{"name":"Nanjing Institute of Technology, School of Environmental Engineering, Nanjing 211167, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Deng","sequence":"additional","affiliation":[{"name":"Center of Yangtze River Ecological Protection and High Quality Development, Chongqing Academy of Environmental Science, Chongqing 401147, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,4,4]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/j.envpol.2013.12.030","article-title":"Air pollution and decreased semen quality: A comparative study of Chongqing urban and rural areas","volume":"187","author":"Zhou","year":"2014","journal-title":"Environ. 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