2018
DOI: 10.1016/j.scitotenv.2017.12.172
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Spatial patterns and temporal variations of six criteria air pollutants during 2015 to 2017 in the city clusters of Sichuan Basin, China

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Cited by 177 publications
(76 citation statements)
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“…According to regression model analysis (RMA) for seasonal and monthly variations, all ambient air pollutants showed statistically remarkable seasonal and monthly variations ( Figure S1(a,b), Figure 2 www.nature.com/scientificreports www.nature.com/scientificreports/ ppb), when SR ( Figure S2a), temperature ( Figure S2a), hydroxyl radical as the most important oxidant species for the formation of O 3 , VOCs and photochemical reactions are higher 26,27 . Observed seasonal and monthly patterns for PM 2.5 , NO 2 , SO 2 and CO can be attributed to a combination of unfavorable meteorological conditions, including stagnant weather, reduced horizontal and vertical WS, higher nebulosity, reduced sunshine time, lower SR, temperature inversion and lower the boundary layer during the coldest seasons and months compared to summer and spring months ( Figure S2) [28][29][30][31] . In relation to PM 10 , exactly similar to Ahvaz city, Middle East dust storm was responsible for the peak concentration of PM 10 during summer in Tehran 11,[32][33][34][35] .…”
Section: Seasonal and Monthly Patterns Of Ambient Air Pollutants To mentioning
confidence: 99%
“…According to regression model analysis (RMA) for seasonal and monthly variations, all ambient air pollutants showed statistically remarkable seasonal and monthly variations ( Figure S1(a,b), Figure 2 www.nature.com/scientificreports www.nature.com/scientificreports/ ppb), when SR ( Figure S2a), temperature ( Figure S2a), hydroxyl radical as the most important oxidant species for the formation of O 3 , VOCs and photochemical reactions are higher 26,27 . Observed seasonal and monthly patterns for PM 2.5 , NO 2 , SO 2 and CO can be attributed to a combination of unfavorable meteorological conditions, including stagnant weather, reduced horizontal and vertical WS, higher nebulosity, reduced sunshine time, lower SR, temperature inversion and lower the boundary layer during the coldest seasons and months compared to summer and spring months ( Figure S2) [28][29][30][31] . In relation to PM 10 , exactly similar to Ahvaz city, Middle East dust storm was responsible for the peak concentration of PM 10 during summer in Tehran 11,[32][33][34][35] .…”
Section: Seasonal and Monthly Patterns Of Ambient Air Pollutants To mentioning
confidence: 99%
“…Anthropogenic activities associated with rapidly developed industrialization and urbanization have been leading to a sustained increase in the amounts of atmospheric pollutants, especially in the fast-developing countries (IPCC, 2013). As one of the largest emission sources of aerosols and their precursors, China has been suffering from serious air pollution for years (Lei et al, 2011;Li et al, 2011), with severe haze events frequently occurring in winter, especially over large urban agglomerations, such as the North China Plain (NCP) (Han et al, 2014;Gao et al, 2015), the Yangtze River Delta area (YRD) (Ding et al, 2016;Wang et al, 2016a), the Pearl River Delta area (PRD) (Fan et al, 2015;Liu et al, 2018b), and the Sichuan Basin (SCB) (Zhao et al, 2018;Zhang et al, 2019). During severe haze events, the observed maximum hourly surface-layer PM 2.5 (fine particulate matter with aerodynamic diameter of 2.5 µm or less) concentration exceeded 1000 µg m -3 (Wang et al, 2013b;Sun et al, 2016;Li et al, 2017a), which could significantly influence visibility (Li et al, 2014), radiation budget (Steiner et al, 2013), atmospheric circulation (Jiang et al, 2017), cloud properties (Unger et al, 2009), and even human health (Guo et al, 2017).…”
Section: Introductionmentioning
confidence: 99%
“…Thus, future studies are suggested to include monitoring NO concentrations. SO2 does not directly involve O3 formation, but it can act as an indicator of industrial emissions contributing to O3 formation [41]. The positive correlations between O3 and PM2.5, as well as PM10, suggested the simultaneous formation of secondary O3 and PM by photochemical reactions in summer [42].…”
Section: Effects Of Air Pollutants and Meteorological Parameters On Mmentioning
confidence: 98%