| 曲靖市大气污染物分布特征及影响因素 |
| Distribution Characteristics and Influencing Factors of Air Pollutants in Qujing City |
| 投稿时间：2024-12-21 修订日期：2025-11-28 |
| DOI：10.19316/j.issn.1002-6002.2026.02.20 |
| 中文关键词: 大气污染物 气象条件 相关性 地理探测器 |
| 英文关键词:air pollutants meteorological conditions relevance geographical detector |
| 基金项目:昆明理工大学自然科学研究基金项目(KKZ3202422048) |
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| 中文摘要: |
| 基于滇东工业城市曲靖市2018—2023年环境空气自动站的大气污染物浓度和气象数据及地方社会经济数据,分析主要大气污染物时空分布特征和影响因素。结果表明:曲靖市环境空气呈现PM2.5和O3复合污染特征。SO2、NO2、CO、PM10、PM2.5浓度春冬高、夏秋低,O3浓度春季最高、夏季次之、秋冬最低。SO2、NO2、PM10、PM2.5月均浓度呈峰谷型分布,CO、O3月均浓度分别为U型、倒U型。O3小时浓度为单峰单谷变化,其余大气污染物小时变化则为双峰双谷。影响因素分析结果显示:大气污染物中,NO2、PM10、PM2.5、CO具有相关性,O3与NO2、CO相关;气象因素中,颗粒物受气温影响较高,O3受温度、湿度和风速影响较大;社会经济因素中,第三产业比值、人均GDP、绿化率和人口密度是影响城市环境空气质量空间变化的主要因子,绿化率、城镇化率、人口密度交互提升度较高。 |
| 英文摘要: |
| Based on atmospheric pollutant concentration from the environmental air automatic stations,meteorological and local socio-economic data from 2018 to 2023 in Qujing City,an industrial city in eastern Yunnan Province,this study analyzed the spatiotemporal distribution characteristics and influencing factors of major atmospheric pollutants.The results showed that the ambient air in Qujing City presented a compound pollution characteristic dominated by PM2.5 and O3.The concentrations of SO2,NO2,CO,PM10 and PM2.5 were higher in spring and winter,and lower in summer and autumn,while the concentration of O3 was highest in spring,followed by summer,and lowest in autumn and winter.The monthly average concentrations of SO2,NO2,PM10,and PM2.5 showed a peak-and-valley pattern,whereas those of CO and O3 showed a U-shaped and inverted U-shaped distribution,respectively.The hourly concentration of O3 showed a single-peak and single-valley variation,while the hourly variations of other atmospheric pollutants showed double-peak and double-valley patterns.Analysis of influencing factors showed that there was a correlation between NO2,PM10,PM2.5,and CO,and O3 was related to NO2 and CO.Among meteorological factors,particulate matter was more affected by temperature,while O3 was more affected by temperature,humidity,and wind speed.Regarding socioeconomic factors,the proportion of tertiary industry in gross domestic product (GDP),per capita GDP,green coverage of built-up areas,and population density were the main factors that affected the spatial changes of urban ambient air quality.Green coverage rate,urbanization rate and population density had the greatest impact on other factors. |
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