| 摘要: |
| 利用乌鲁木齐市2018-2022年采暖期期间的大气环境监测数据和气象数据,首先分析了PM2.5、PM10、NO2、SO2、O3和CO六种典型大气污染物的时空分布特征,并确定了首要污染物PM2.5,最后将首要污染物与HYSPLIT模型相结合,采用聚类分析、潜在源区贡献(PSCF)和浓度权重轨迹(CWT)等方法,揭示了研究期间乌鲁木齐市首要污染物的潜在源区分布及其贡献特性。结果表明:在2018-2022年采暖期期间SO2、CO、O3浓度各周期均未超出国家标准限值,而PM2.5、PM10和NO2的浓度仍处于较高水平,尤其是米东区环保局和收费所两个监测站点污染物浓度远高于其他站点；乌鲁木齐市大气PM2.5污染主要受到来自西部、西北和西南三个方向的影响,短距离输送影响较大；PM2.5的潜在源区主要集中于乌鲁木齐市本地及其西部沿天山山脉北部。 |
| 关键词: 大气污染物 浓度特征 潜在源区 采暖期 乌鲁木齐 |
| DOI： |
| 分类号:Ｘ511 |
| 基金项目:新疆维吾尔自治区自然科学基金资助项目；国家自然科学基金项目 |
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| Characteristics of Changes in Air Pollutant Concentrations and Analysis of Potential Pollution Sources during the Heating Period in Urumqi |
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| Abstract: |
| Using the atmospheric environmental monitoring data and meteorological data of Urumqi City during the 2018-2022 heating period, the spatial and temporal distribution characteristics of six typical air pollutants, namely PM2.5, PM10, NO2, SO2, O3 and CO, were firstly analyzed and the top pollutant, PM2.5, was identified, and finally, the top pollutant was combined with the HYSPLIT model to reveal the distribution of the top pollutants and their contribution characteristics by using the cluster analysis, potential source area contribution (PSCF) and concentration weight trajectory (CWT) to reveal the potential source area distribution of the top pollutants and their contribution characteristics in Urumqi during the study period. The results show that: the SO2, CO, and O3 concentrations did not exceed the national standard limits in each cycle during the 2018-2022 heating period, while the concentrations of PM2.5, PM10, and NO2 were still at a high level, especially the pollutant concentrations in the two monitoring stations of the Environmental Protection Bureau of the Midong District and the Toll House were much higher than the other stations; the atmospheric PM2.5 pollution in Urumqi was mainly affected by airborne transport from the western, northwestern, and southwestern directions, with a high impact of short-range transport; the potential source areas of PM2.5 are mainly concentrated locally in Urumqi and to the west along the northern part of the Tianshan Mountain Range. |
| Key words: Air pollutants Concentration characteristics Potential source Heating period Urumqi |
