| 大连市一次典型臭氧污染过程分析 |
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| 引用本文： | 徐洁.大连市一次典型臭氧污染过程分析[J].绿色科技,2021(4). |
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| 作者姓名： | 徐洁 |
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| 作者单位： | 辽宁省大连生态环境监测中心 |
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| 摘 要： | 针对2015年大连市的一次高浓度臭氧污染过程的气象条件、污染物浓度和污染气团轨迹进行了分析,探讨了该次臭氧污染过程中浓度变化规律、本地生成特征、区域传输特征及污染成因。结果表明:4月25日,臭氧达到中度污染,高温、强光照下本地光化学反应生成大量臭氧是内因,低压辐合、逆温、风速小等不利气象条件导致高浓度臭氧难以扩散是外因;4月26日,臭氧维持轻度污染,是由于前一日臭氧本底值较高,叠加白天光化学反应生成导致;4月27日,臭氧维持轻度污染,并出现凌晨持续升高的现象,这与区域输送密切相关。
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| 关 键 词： | 臭氧 污染过程 区域输送 |
Analysis of a Typical Ozone Pollution Episode in Dalian City |
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| Xu Jie.Analysis of a Typical Ozone Pollution Episode in Dalian City[J].LVSE DASHIJIU,2021(4). |
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| Authors: | Xu Jie |
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| Institution: | (Dalian Ecological Environmental Monitoring Center of Liaoning Province,Dalian,Liaoning 116023,China) |
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| Abstract: | Based on the analysis of meteorological factors,variations of pollutant concentrations,and back trajectories of polluted air mass from a typical ozone pollution episode in 2015,the concentration change rule,local generation characteristics,regional transmission characteristics and pollution causes in this ozone pollution episode are discussed.The results showed that the ozone reached moderate pollution on April 25;the local photochemical reaction under high temperature and strong light generated a large amount of ozone due to internal causes.The external cause is that the unfavorable meteorological conditions such as low-pressure convergence,temperature inversion and low wind speed made the high concentration of ozone difficult to diffuse.Ozone remained slightly polluted on April 26 due to the high background ozone value of the previous days and the photochemical reaction during the day.Ozone remained slightly polluted on April 27,and continued to rise in the early morning hours,which was closely related to regional transport. |
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| Keywords: | ozone pollution episode regional transmission |
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