| 基于四维通量法的佛山臭氧污染输送量化 |
| 摘要点击 1620 全文点击 438 投稿时间：2022-05-17 修订日期：2022-10-20 |
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| 中文关键词 佛山 臭氧污染 区域输送 四维通量法 WRF-Chem模式 |
| 英文关键词 Foshan ozone pollution regional transport four-dimensional flux method WRF-Chem model |
| 作者 | 单位 | E-mail | | 吴莉萍 | 暨南大学环境与气候研究院, 广州 511443 | wlp@stu2020.jnu.edu.cn | | 莫海华 | 暨南大学环境与气候研究院, 广州 511443 | | | 杨丽婷 | 暨南大学环境与气候研究院, 广州 511443 | | | 蔡梓炯 | 暨南大学环境与气候研究院, 广州 511443 | | | 吴国彤 | 暨南大学环境与气候研究院, 广州 511443 | | | 白玉洁 | 暨南大学环境与气候研究院, 广州 511443 | | | 邓思欣 | 广东省佛山生态环境监测站, 佛山 528000 | | | 司徒淑娉 | 广东省佛山生态环境监测站, 佛山 528000 | situshp@sthj.foshan.gov.cn | | 常鸣 | 暨南大学环境与气候研究院, 广州 511443 | changming@email.jnu.edu.cn | | 王雪梅 | 暨南大学环境与气候研究院, 广州 511443 | |
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| 中文摘要 |
| 定量输送过程对大气污染事件的贡献程度一直是目前区域大气污染防控的突出难点和重要需求.对此,基于WRF-Chem模式对佛山典型区域性臭氧(O3)污染事件开展模拟,应用四维通量法分别量化周边区域对佛山市臭氧及其前体物的输送通量,厘清臭氧直接输送和前体物输送的贡献,发现周边区域对佛山市输送的O3总通量平均值为120.3 t ·h-1; 挥发性有机化合物(VOCs)总通量平均值为30.2 t ·h-1; 其对应的臭氧生成潜势(OFP)为114.8 t ·h-1.通过统计各O3污染事件的输送通量,发现污染期间输入佛山O3通量最大的城市为广州(贡献率为44%); 输入VOCs通量最大的城市为肇庆(贡献率为48%).分析输送VOCs排放导致的O3生成潜势发现含氧挥发性有机物(OVOCs)对OFP的贡献最大,在"最大输入事件"中占比为47%.甲醛、二甲苯、醛类、丙酮和苯酚类等OVOCs和芳香烃是对OFP贡献前5的物种,贡献量占总OFP的50%以上,主要来自工业溶剂源. |
| 英文摘要 |
| Quantifying the contribution of transport processes to air pollution events has been a prominent challenge and an important need in regional air pollution prevention and control. The WRF-Chem model was used to simulate a typical regional ozone (O3) pollution event in Foshan, and the four-dimensional flux method was applied to quantify the transport fluxes of ozone and its precursors from the surrounding areas to Foshan and to clarify the contributions of the direct transport of ozone and transport of precursors. The average ozone flux from the surrounding areas to Foshan was 120.3 t·h-1, the volatile organic compound (VOCs) flux was 30.2 t·h-1, and the corresponding ozone formation potential (OFP) was 114.8 t·h-1. By counting the transport fluxes of each ozone pollution event, it was found that the city with the largest ozone flux into Foshan during the pollution period was Guangzhou (contributed 44%); the city with the largest input VOCs flux was Zhaoqing (contributed 48%). The analysis of ozone generation potential due to transported VOCs emissions found that oxygenated volatile organic compounds (OVOCs) contributed the most to OFP, accounting for 47% of the "maximum input events." OVOCs and aromatic hydrocarbons such as formaldehyde, xylenes, aldehydes, acetone, and phenols were the top five species contributing to the OFP, contributing more than 50% of the total OFP, mainly from industrial solvent sources. |
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