| 新疆生产建设兵团第五师双河市大气污染物演变趋势及冬季典型重污染过程成因分析 |
| Analysis of the Evolution Trend of Air Pollutants and the Causes of Typical Heavy Pollution Process in Winter in Shuanghe City of the Fifth Division of Xinjiang Production and Construction Corps |
| 投稿时间：2024-11-22 修订日期：2025-04-15 |
| DOI：10.19316/j.issn.1002-6002.2026.01.14 |
| 中文关键词: 第五师双河市 首要污染物 分布特征 演变趋势 重污染 |
| 英文关键词:Shuanghe City of the Fifth Division primary pollutant distribution characteristic evolution trend heavy air pollution |
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| 中文摘要: |
| 基于2020—2023年第五师双河市空气质量自动监测数据,对该区域环境空气质量变化趋势以及大气污染物浓度年度演变趋势和季节分布特征进行了综合分析,并运用因子分析和后向轨迹模型对典型重污染过程进行了溯源分析。结果显示:①2020—2023年,该区域环境空气质量优良率由76.0%提升至89.2%,冬季重污染天首要污染物为PM2.5和PM10。PM2.5和PM10作为轻度及中度污染天首要污染物的比例逐年递减,O3所占比例由8.1%大幅上升至51.9%。②SO2、NO2年均浓度逐年下降,CO、PM10和PM2.5年均浓度呈波动式下降。固定源、机动车源及扬尘源减排是上述污染物浓度下降的关键原因。O3年均浓度自2022年开始大幅上升,2023年较2021年上升27.4%。③SO2浓度未呈现明显的季节变化特征,PM10、PM2.5、NO2、CO浓度峰值均出现在秋冬季,O3月均浓度在夏季达峰后缓慢下降。④2021年冬季重污染主要源自机动车排放和燃煤排放。气象因素分析结果显示,气压、风速与PM2.5浓度呈负相关。重污染过程气团主要来自第五师双河市东南部、博州精河县和伊犁州东南部,PM2.5输送浓度较高的气团主要来自上述区域和伊犁州奎屯市。 |
| 英文摘要: |
| Based on the automatic monitoring data of air quality in Shuanghe City of the Fifth Division from 2020 to 2023,the change trends of ambient air quality and the annual evolution trends and seasonal distribution characteristics of air pollutant concentrations in the region were comprehensively analyzed,and the typical heavy air pollution process was traced by factor analysis and backward trajectory model.The results showed that:① From 2020 to 2023,the excellent and good rate of ambient air quality in this area increased from 76.0% to 89.2%.The primary pollutants in winter heavy pollution days were PM2.5 and PM10.The proportion of PM2.5 and PM10 as the primary pollutants in mild and moderate pollution days decreased year by year,while the proportion of O3 increased significantly from 8.1% to 51.9%.② The annual average concentrations of SO2 and NO2 decreased year by year,and the annual average concentrations of CO,PM10,and PM2.5 decreased in a fluctuating manner.Emission reduction from stationary sources,motor vehicles and dust sources were key factors to promote the decrease in concentrations of these pollutants.The annual average concentration of O3 increased significantly since 2022,and increased by 27.4% in 2023 compared with 2021.③ SO2 concentration did not show obvious seasonal variation characteristics,the peak concentrations of PM10,PM2.5,NO2 and CO all appeared in autumn and winter,and the monthly average concentration of O3 decreased slowly after reaching the peak in summer.④ The heavy air pollution in winter 2021 primarily originated from motor vehicle emissions and coal-fired emissions.The results of meteorological factor analysis showed that air pressure and wind speed were negatively correlated with PM2.5 concentration.The air masses during heavy air pollution process mainly came from the southeastern part of Shuanghe City of the Fifth Division,Jinghe County of Bozhou,and the southeastern part of Yili Prefecture.Air masses with higher with higher PM2.5 transport concentrations primarily came from the above areas and Kuitun City of Yili Prefecture. |
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