| 摘要: |
| 在对2015—2021年郴州城区不同时间尺度臭氧（O3 ）污染特征进行分析的基础上，进一步研究气象因素对O3污染的影响，并采用潜在源贡献因子分析法（PSCF）对郴州城区O3污染传输路径及潜在污染源进行分析。结果表明：2015—2021 年郴州城区O3质量类别主要为优和良，比例达到98.9%，O3为首要污染物的天数呈波动上升趋势。O3的年均质量浓度整体呈现波动上升趋势，2021年相对于2015年上升了6.0%，年内变化呈现“M”双峰型特征，日变化呈现单峰单谷分布，峰值出现在14：00—15：00。O3质量浓度与日照时数及温度呈显著正相关，与相对湿度呈显著负相关；O3质量浓度随风速的增加，先上升后下降。郴州城区O3污染在超标日期间以短距离输送气流为主，占比达89.7%，主要为东北方及南方气流。在本地西南部污染贡献较大的基础上，受区域输送影响明显，主要为广东省西南部及西北部、江西省西北部、湖北省中部的污染排放。针对郴州城区O3污染，须在严格控制本地污染排放的基础上，进一步加强区域联防联控。 |
| 关键词: 臭氧 气象影响 潜在源贡献因子分析法 浓度权重轨迹分析法 污染特征 |
| DOI：DOI：10.3969/j.issn.1674-6732.2024.03.005 |
| 分类号:X515 |
| 基金项目:湖南省环保科研项目（HBKT-2021019） |
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| Analysis of Ozone Pollution Variations Characteristic and Its Meteorological Influences and Transport Source in Chenzhou City from 2015 to 2021 |
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GAO Wenyuan， XIAO Tongjue， ZOU Lin*， ZENG Yu， JIANG Ruixiao， YU Yi
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Ecology and Environment Monitoring Centre of Hunan， Changsha， Hunan 410014， China
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| Abstract: |
| Based on analysis of ozone（O3）pollution characteristics of different time scales from 2015 to 2021 of Chenzhou City， the influence of meteorological factors on ozone pollution were further studied， ozone pollution transmission path and potential pollution sources in Chenzhou City were investigated by using the potential source contribution function （PSCF）.Results indicated that the quality level of O3 is mainly excellent and good in Chenzhou City from 2015 to 2021， proportion reached 98.9%， the days in which O3was the primary pollutant showed a fluctuating upward trend. Overall， the annual average concentration of MDA8 presented an upward trend， exhibiting a 6.0% increase from 2015 to 2021， monthly variations of each year featured with an “M” type double peak， the diurnal variation showed a discernible single peak and single valley distribution with a peak between 14：00 and 15：00. The O3 concentration demonstrated a significant linear positive correlation with hours of sunshine and air temperature， and demonstrated a significant linear negative correlation with the relative humidity， O3 concentration rises first and then decreases with the increase of wind speed. The transmission mainly relied on short distance airflow from northeast and south during over standard days of O3 pollution in Chenzhou City，accounting for 89.7%. Based on the high contribution of local southwest pollution， the pollution from southwest and northwest of Guangdong province，northwest of Jiangxi province，middle part of Hubei province were obvious，in order to control the O3 pollution in Chenzhou City， it is necessary to further strengthen regional joint prevention and control on the basis of strict control of local pollution discharge. |
| Key words: O3 Meteorological influence PSCF CWT Pollution characteristics |
