武漢市一次霾污染過程不同發(fā)展階段下水溶性離子來源解析

doi:10.12306/2021jms.0083

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武漢市一次霾污染過程不同發(fā)展階段下水溶性離子來源解析
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                        10.12306/2021jms.0083
                    
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中圖分類號:X513
基金項目:國家自然科學基金資助項目(41830965;42075186);2023年江蘇省研究生科研創(chuàng)新項目(KYCX23_1331)

Analysis of sources of water-soluble ions in different development stages of a haze pollution process in Wuhan

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本文利用氣體組分及大氣氣溶膠在線監(jiān)測系統(tǒng)(MARGA ADI 2080)觀測武漢市2018年1月9—26日大氣氣溶膠中的8種水溶性離子(NH⁺₄、NO^-₃、SO^2-₄、Cl^-、K⁺、Ca²⁺、Na⁺和Mg²⁺),結合氣象要素數(shù)據(jù),使用主成分分析(PCA)、正定矩陣因子分析法(PMF)、HYSPLIT后向軌跡模式、潛在源區(qū)貢獻(PSCF)和濃度權重軌跡(CWT),對霾污染過程中水溶性離子進行了全面的來源解析,探究了霾不同階段下來源差異和空間分布特征。結果表明:(1)本次霾污染中的8種水溶性離子和4種污染氣體,PCA解析出的源和占比分別為二次源和燃煤源的混合源(41.28%)、工業(yè)排放和土壤揚塵混合源(27.73%)和機動車排放源(9.63%),PMF解析出的源和占比分別為燃煤與土壤揚塵混合源(18.57%)、機動車排放源(20.74%)、二次源(18.30%)、光化學污染源(22.24%)和燃煤源(20.15%)。(2)霾在不同階段下水溶性離子和4種污染氣體的來源存在差異,在清潔天和霾消散階段,光化學的貢獻最高,占比分別為31.42%和36.07%;在霾發(fā)生階段燃煤與土壤揚塵源的貢獻最高,其貢獻為40.94%;在霾發(fā)展階段,最大的控制源為二次源,貢獻占比為37.51%。(3)此次武漢市霾污染中PM_2.5濃度和NH⁺₄、NO^-₃和SO^2-₄的潛在源區(qū)為皖豫鄂三省和贛湘鄂三省交界處。霾污染中PM_2.5的主要影響范圍是武漢市南部和北部省份,NO^-₃、NH⁺₄和SO^2-₄的主要影響區(qū)域為武漢市東北方向的城市、湖南省和江西省。

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 PM_2.5 concentration and NH⁺₄, NO^-₃ and SO^2-₄ in Wuhan are in the intersection of Anhui, Henan and Hubei Province and Jiangxi, Hunan and Hubei Province. The affected areas of PM_2.5 pollutants are mainly in the southern and northern provinces of Wuhan. The affected areas of NO^-₃, NH⁺₄ and SO^2-₄ are mainly the cities northeast of Wuhan, Hunan and Jiangxi Province.

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劉思晗,王紅磊,趙天良,劉安康,可玥,白永清.武漢市一次霾污染過程不同發(fā)展階段下水溶性離子來源解析.氣象科學,2023,43(4):473-484 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. Journal of the Meteorological Sciences,2023,43(4):473-484

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收稿日期:2021-07-20
最后修改日期:2021-09-01
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在線發(fā)布日期: 2024-01-23
出版日期: 2023-08-15

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