Spatial and temporal variation characteristics of air pollutants in

Abstract

Abstract: Objective To systematically analyze the spatial and temporal variation characteristics of inhalable particle（PM₁₀）,fine particle（PM_2.5）,NO₂,SO₂,CO and O₃,provide scientific basis for the prevention and control of air pollutants in "Wuchangshi" area. Methods Based on data from national air quality monitoring sites in "Wuchangshi" area from 2016 to 2020,the spatial and temporal variation characteristics and correlation of six air pollutants were analyzed. Results As for spatial distribution patterns,obviously differences existed for six pollutants in "Wuchangshi" area from 2016 to 2020. Except SO₂ and O₃,the mean concentration of all pollutants was the highest in Urumqi. From 2016 to 2020,the annual mean concentrations of PM₁₀,PM_2.5,NO₂,CO and SO₂ decreased by 13.3%,9.3%,17.9%,25.9% and 45.2%,respectively. In contrast,the annual mean concentration of O₃ increased by 23.8%. The concentrations of PM₁₀,PM_2.5,NO₂,CO and SO₂ were more serious in winter,and the lowest in summer. The highest concentration of O₃ occurred in spring and summer,and the lowest in winter. The daily concentrations of PM₁₀,PM_2.5,CO and NO₂ presented double peaks distribution,the peak of PM₁₀ and PM_2.5 concentration occurred at 00：00-02：00 at night,while the daytime peaks occurred at 10：00-13：00 and 14：00-16：00,respectively. The peak of NO₂ and CO concentration occurred at 23：00-01：00 and 09：00-11：00,respectively. The peak of SO₂ and O₃ concentration occurred at 13：00-16：00 and 16：00-17：00,respectively. The concentrations of PM₁₀,PM_2.5,NO₂,SO₂ and CO in "Wuchangshi" area were significantly positively correlated with each other,while O₃ and the five pollutants were significantly negatively correlated. Conclusion Except O₃,the air pollution in "Wuchangshi" area has been improving year by year,but the pollution of PM₁₀ and PM_2.5 still exceeds the second-level concentration limit,so the emphasis should be placed on the coordinated prevention and control of O₃ and atmospheric particulate pollution in "Wuchangshi" area.

Key words: Air pollutants, "Wuchangshi" area, Temporal and spatial distribution, Correlation analysis

CLC Number:

R122.1

CAO Ke, LI Xiaolin, WANG Yongzhi, HUI Yu, ZHANG Shixian, YANG Jian. Spatial and temporal variation characteristics of air pollutants in "Wuchangshi" area during 2016-2020. [J]OCCUPATION AND HEALTH, 2023, 39(20): 2826-2831.

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Spatial and temporal variation characteristics of air pollutants in "Wuchangshi" area during 2016-2020

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