| 2018~2022年天山北坡地区主要城市气象因素对近地面臭氧的影响 |
| 摘要点击 390 全文点击 53 投稿时间：2024-04-01 修订日期：2024-07-04 |
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| 中文关键词 臭氧（O3） KZ滤波法 气象因素 多元线性回归 O3生成敏感性 |
| 英文关键词 ozone（O3） KZ filter meteorological conditions multiple linear regression O3 sensitivity |
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| 中文摘要 |
| 去除气象因素影响的臭氧（O3）变化趋势分析,对评价大气污染防治政策的实施效果非常重要.采用KZ滤波法和多元线性逐步回归相结合的方法,研究了天山北坡经济带大气污染严重的4个城市（石河子、昌吉市、五家渠市和乌鲁木齐市）近5 a（2018~2022年）气象因素对近地面O3浓度的影响.结果表明,臭氧8h滑动平均值（O3-8h）的季节分量对原始O3-8h序列总方差的贡献率最大（≥69.3%）,长期分量对总方差的贡献率最小（≤1.9%）,说明城市近地面O3浓度主要受季节和短期气象条件变化的影响.O3-8h浓度与日最高气温呈显著正相关,与相对湿度和气压呈负相关；风速升高时,O3-8h浓度显著上升.气象因素的变化对O3-8h浓度改变的贡献率为33%~61%,艾青诗歌馆和培训基地气象条件对O3-8h浓度的贡献率较小,分别为48%和33%,而其他站点气象条件影响较大.昌吉市（新区政务中心）、五家渠市（农水大厦）和乌鲁木齐市（监测站、米东区环保局）O3敏感性倾向于VOCs控制；石河子（艾青诗歌馆）和乌鲁木齐市（培训基地）O3敏感性向混合敏感型或NOx控制型靠近.本研究有助于认识气象因素对天山北坡经济带主要城市O3浓度的影响,为西北地区大气O3污染管控提供科技支撑. |
| 英文摘要 |
| The analysis of the ozone trend after removing the influence of meteorological factors is extremely important to evaluate the implementation effect of air pollution prevention and control policies. The effects of meteorological factors on near-surface ozone concentrations in four cities （Shihezi, Changji, Wujiaqu, and Urumqi） with serious air pollution in the economic zone of the northern slope of the Tianshan Mountains in the past five years （2018-2022） were investigated using a combination of the KZ filtering method and multiple linear stepwise regression. The results showed that the seasonal component of O3-8h contributed the most （≥69.3%） to the total variance of the original O3-8h sequence, and the long-term component contributed the least （≤1.9%） to the total variance, indicating that near-surface ozone concentration （in the cities） was mainly affected by the changes in seasonal and short-term meteorological conditions. O3 was significantly positively correlated with daily maximum temperature and negatively correlated with relative humidity and barometric pressure. O3-8h concentrations increased significantly at elevated wind speeds, which may have been due to the titration reaction of O3 with locally emitted NO under quiescent conditions, whereas faster regional transport replenished locally consumed O3. Changes in meteorological factors contributed 33%-61% percent to the change in O3 concentration, and the meteorological conditions of Aiqing Poetry Hall and the Training Base contributed less to the O3-8h concentration, 48% and 33%, respectively, whereas the meteorological conditions of other stations had a greater impact. Using the analysis of changes in O3 and NO2 concentrations before and after the removal of meteorological factors, the effect of meteorological factors on the sensitivity partitioning of O3 production could be observed. The ozone sensitivity of Changji （the Government Affairs Center of the New District）, Wujiaqu （the Nongshui Building）, and Urumqi （the monitoring station and Midong District Environmental Protection Bureau） tended to be VOCs-controlled, whereas in the sites in Shihezi （the Aiqing Poetry Museum） and Urumqi （the training base） the ozone sensitivity was closer to mixed sensitivity or NOx-controls. This study helps to recognize the influence of meteorological factors on O3 concentration in major cities in the economic zone of the north slope of Tianshan Mountain and provides scientific and technological support for the control of atmospheric ozone pollution in Northwest China. |
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