| 武汉市一次霾污染过程不同发展阶段下水溶性离子来源解析 |
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| 引用本文： | 刘思晗,王红磊,赵天良,刘安康,可玥,白永清.武汉市一次霾污染过程不同发展阶段下水溶性离子来源解析[J].气象科学,2023,43(4):473-484. |
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| 作者姓名： | 刘思晗 王红磊 赵天良 刘安康 可玥 白永清 |
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| 作者单位： | 南京信息工程大学 气象灾害预报预警与评估协同创新中心/中国气象局气溶胶-云-降水重点开放实验室, 南京 210044;中国气象局武汉暴雨研究所, 武汉 430205 |
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| 基金项目： | 国家自然科学基金资助项目(41830965;42075186);2023年江苏省研究生科研创新项目(KYCX23_1331) |
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| 摘 要： | 本文利用气体组分及大气气溶胶在线监测系统(MARGA ADI 2080)观测武汉市2018年1月9—26日大气气溶胶中的8种水溶性离子(NH+4、NO-3、SO2-4、Cl-、K+、Ca2+、Na+和Mg2+),结合气象要素数据,使用主成分分析(PCA)、正定矩阵因子分析法(PMF)、HYSPLIT后向轨迹模式、潜在源区贡献(PSCF)和浓度权重轨迹(CWT),对霾污染过程中水溶性离子进行了全面的来源解析,探究了霾不同阶段下来源差异和空间分布特征。结果表明:(1)本次霾污染中的8种水溶性离子和4种污染气体,PCA解析出的源和占比分别为二次源和燃煤源的混合源(41.28%)、工业排放和土壤扬尘混合源(27.73%)和机动车排放源(9.63%),PMF解析出的源和占比分别为燃煤与土壤扬尘混合源(18.57%)、机动车排放源(20.74%)、二次源(18.30%)、光化学污染源(22.24%)和燃煤源(20.15%)。(2)霾在不同阶段下水溶性离子和4种污染气体的来源存在差异,在清洁天和霾消散阶段,光化学的贡献最高,占比分别为31.42%和36.07%;在霾发生阶段燃煤与土壤扬尘源的贡献最高,其贡献为40.94%;在霾发展阶段,最大的控制源为二次源,贡献占比为37.51%。(3)此次武汉市霾污染中PM2.5浓度和NH+4、NO-3和SO2-4的潜在源区为皖豫鄂三省和赣湘鄂三省交界处。霾污染中PM2.5的主要影响范围是武汉市南部和北部省份,NO-3、NH+4和SO2-4的主要影响区域为武汉市东北方向的城市、湖南省和江西省。
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| 关 键 词： | 武汉市 霾 水溶性离子 来源解析 潜在源区 |
| 收稿时间： | 2021/7/20 0:00:00 |
| 修稿时间： | 2021/9/1 0:00:00 |
Analysis of sources of water-soluble ions in different development stages of a haze pollution process in Wuhan |
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| LIU Sihan,WANG Honglei,ZHAO Tianliang,LIU Ankang,KE Yue,BAI Yongqing.Analysis of sources of water-soluble ions in different development stages of a haze pollution process in Wuhan[J].Scientia Meteorologica Sinica,2023,43(4):473-484. |
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| Authors: | LIU Sihan WANG Honglei ZHAO Tianliang LIU Ankang KE Yue BAI Yongqing |
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| Institution: | Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing 210044, China; Institute of Heavy Rain, China Meteorological Administration, Wuhan 430205, China |
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| Abstract: | MARGA ADI 2080 online gas composition and aerosol monitoring system was used to continuously observe the water-soluble ion composition in Wuhan aerosol particles from January 9 to 26, 2018. Combined with meteorological data, the Principal Component Analysis (PCA), the Positive define Matrix Factorization (PMF), the Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT), the Potential Source Concentration Function (PSCF) and the Concentration Weighted Trajectory (CWT) were used to analyze the source differences and spatial distribution characteristics of water-soluble ions in haze pollution process. Results show as follows: (1) the eight water-soluble ions in the haze pollution are the mixed source of secondary and coal burning (41.28%), industrial emissions and soil dust (27.73%) and motor vehicle emissions (9.63%) by PCA analysis. The source and proportion of PMF analysis are mixed source of coal burning and soil dust (18.57%), motor vehicle emission source (20.74%), secondary source (18.30%), photochemical pollution source (22.24%) and coal burning source (20.15%). (2) There are differences in the sources of water-soluble ions and four kinds of pollution gases in different haze stages. Photochemistry contributes the most in clean and haze dissipation stages, accounting for 31.42% and 36.07%, respectively. In the haze stage, the contribution of coal burning and soil dust source is the highest, both of which are 40.94%. In the haze development stage, the largest control source is secondary source, contributing 37.51%. (3)The main sources of PM2.5 concentration and NH+4, NO-3 and SO2-4 in Wuhan are in the intersection of Anhui, Henan and Hubei Province and Jiangxi, Hunan and Hubei Province. The affected areas of PM2.5 pollutants are mainly in the southern and northern provinces of Wuhan. The affected areas of NO-3, NH+4 and SO2-4 are mainly the cities northeast of Wuhan, Hunan and Jiangxi Province. |
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| Keywords: | Wuhan haze water-soluble ions source analysis potential source area |
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