Source apportionment of airborne particulate matter in Southeast Texas using a source-oriented 3D air quality model
Source apportionment of airborne particulate matter in Southeast Texas using a source-oriented 3D air quality model
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DOI：
10.1016/j.atmosenv.2010.06.004
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发表时间：
2010-09
影响因子：
5
通讯作者：
Hongliang Zhang;Q. Ying
中科院分区：
文献类型：
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作者：
Hongliang Zhang;Q. Ying
开发了面向源的外部混合 UCD/CIT 模型的嵌套版本，用于研究德克萨斯 2000 年空气质量研究 (TexAQS 2000) 期间为期两周的空气质量事件期间对空气中颗粒物 (PM) 的源贡献。确定了休斯顿-加尔维斯顿湾 (HGB) 和博蒙特-亚瑟港 (BPA) 地区对一次 PM 和二次硫酸铵的贡献。预测的 24 小时元素碳 (EC)、有机化合物 (OC)、硫酸盐、铵离子和初级 PM2.5 质量与基于过滤器的观测结果非常吻合。德克萨斯州拉波特的柴油和汽油发动机以及生物质燃烧有机气溶胶 (BBOA) 每小时硫酸盐、铵离子和初级 OC 的预测浓度与 Aerodyne 气溶胶质谱仪 (AMS) 的测量结果非常吻合。 UCD/CIT 模型预测 EC 主要来自柴油发动机，大部分主要 OC 来自内燃机和工业来源。露天燃烧贡献了大部分 EC、OC 和初级 PM2.5 质量。道路灰尘、内燃机和工业是初级PM2.5的主要来源。野火在火灾附近地区的所有主要 PM 成分中占主导地位。预测的初级 PM 源贡献与化学质量平衡 (CMB) 模型的结果基本一致。两个模型之间的差异表明有必要对工业 PM 排放进行进一步调查。二次无机 PM 中，主要为硫酸仲铵。 4 公里范围内 80% 以上的次生硫酸盐是在上风区产生的。煤炭燃烧是硫酸盐的最大来源。铵离子主要来自农业，而城市地区汽油车的贡献也很大。
A nested version of the source-oriented externally mixed UCD/CIT model was developed to study the source contributions to airborne particulate matter (PM) during a two-week long air quality episode during the Texas 2000 Air Quality Study (TexAQS 2000). Contributions to primary PM and secondary ammonium sulfate in the Houston–Galveston Bay (HGB) and Beaumont–Port Arthur (BPA) areas were determined. The predicted 24-h elemental carbon (EC), organic compounds (OC), sulfate, ammonium ion and primary PM2.5mass are in good agreement with filter-based observations. Predicted concentrations of hourly sulfate, ammonium ion, and primary OC from diesel and gasoline engines and biomass burning organic aerosol (BBOA) at La Porte, Texas agree well with measurements from an Aerodyne Aerosol Mass Spectrometer (AMS). The UCD/CIT model predicts that EC is mainly from diesel engines and majority of the primary OC is from internal combustion engines and industrial sources. Open burning contributes large fractions of EC, OC and primary PM2.5mass. Road dust, internal combustion engines and industries are the major sources of primary PM2.5. Wildfire dominates the contributions to all primary PM components in areas near the fires. The predicted source contributions to primary PM are in general agreement with results from a chemical mass balance (CMB) model. Discrepancy between the two models suggests that further investigations on the industrial PM emissions are necessary. Secondary ammonium sulfate accounts for the majority of the secondary inorganic PM. Over 80% of the secondary sulfate in the 4 km domain is produced in upwind areas. Coal combustion is the largest source of sulfate. Ammonium ion is mainly from agriculture sources and contributions from gasoline vehicles are significant in urban areas.