基于CMAQ-ISAM模型对石家庄市臭氧污染过程模拟分析 |
摘要点击 2378 全文点击 471 投稿时间:2023-09-15 修订日期:2023-11-28 |
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中文关键词 臭氧(O3) CMAQ-ISAM模型 过程分析 源解析 石家庄市 |
英文关键词 ozone (O3) CMAQ-ISAM model process analysis source resolution Shijiazhuang City |
作者 | 单位 | E-mail | 耿雅娴 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | 792342447@qq.com | 郭婧涵 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | | 葛宇轩 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | | 王树桥 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | | 袁京周 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | | 张丁超 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | | 王欣 | 河北科技大学环境科学与工程学院, 石家庄 050018 挥发性有机物与恶臭污染防治技术国家地方联合工程研究中心, 石家庄 050018 | wangxinwa84@163.com |
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中文摘要 |
石家庄市历年6月皆为臭氧(O3)污染高发阶段,2023年6月O3 8h浓度平均值(O3-8h)污染超标天数占该月天数的80%,O3为首要污染物占比达100%. 针对6月11~18日的一次O3重污染过程,利用空气质量模型WRF-CMAQ模拟,平均误差数据MFB为-10.47%和MFE为17.96%,处于理想误差水平范围内. 利用CMAQ过程分析模块进行石家庄市物理和化学过程模拟,得到干沉降(DDEP)浓度贡献为-23.88 μg·m-3,是消耗O3的主要过程,而输送过程(TRAN)是O3的主要来源,其中贡献较大为垂直输送(VTRA). 同时利用CMAQ中源解析模块(ISAM)对石家庄市本地与周边区域的O3贡献进行了详细分析. 结果表明,石家庄市本地行业贡献源的贡献率大小为:交通源(12.54%)>工业源(6.94%)>居民源(6.56%)>电力源(4.75%). 而远距离传输源(BCON)持续处于高贡献首位,贡献率为63.31%. 平稳天气下的重污染时段,嵌套域D02层中BCON低于标记区域对石家庄市的浓度贡献总和,周边城市中,保定市在平稳天气下贡献率最高,为26.21%. 后期邢台市在高值西南风作用下,浓度贡献也迅速升高. 要切实减轻O3污染,不仅要对本市减排,还需要对上风向城市进行提前控制,实行区域间联防联控才是关键. |
英文摘要 |
In Shijiazhuang City, ozone (O3) pollution occurs frequently in June every year. In June 2023, the average O3 8 h concentration (O3-8h) pollution exceeded 80% of the days in the month, and O3 was the primary pollutant, accounting for 100%. For an O3 heavy pollution process from June 11 to 18, the air quality model WRF-CMAQ was used for simulation, and the average error data MFB and MFE were -10.47% and 17.96%, respectively, which was within the ideal error range. The CMAQ process analysis module was used to simulate the physical and chemical processes in Shijiazhuang City, and the dry deposition (DDEP) contribution concentration was -23.88 μg·m-3, which was the main process of O3 consumption, whereas the transport process (TRAN) was the main source of O3, among which the contribution was more significant in vertical transport (VTRA). At the same time, the source analysis module (ISAM) was used to analyze the O3 contribution of local and surrounding areas in Shijiazhuang City. The results showed that the contribution rate of local industry sources in Shijiazhuang City was as follows: traffic source (12.54%) > industrial source (6.94%) > residential source (6.56%) > power source (4.75%). The long-distance transmission source (BCON) continued to be in the first place with a high contribution rate of 63.31%. In the heavy pollution period under stable weather, the contribution concentration of BCON in the D02 layer of the nested domain to Shijiazhuang City was lower than the sum of the marked area. Among the surrounding cities, Baoding City had the highest contribution rate under stable weather, accounting for 26.21%. In the late period, the contribution concentration of Xingtai City increased rapidly under the action of high-value southwest wind. To effectively reduce O3 pollution, it is necessary to reduce emissions in the city and to control the upwind cities in advance, and the implementation of inter-regional joint prevention and control is the key. |
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