| 台风“浪卡”过程对海南岛臭氧污染的影响分析 |
| 摘要点击 2534 全文点击 2098 投稿时间：2022-06-11 修订日期：2022-08-01 |
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| 中文关键词 臭氧(O3) 台风 气象条件 概念模型 海南 |
| 英文关键词 ozone (O3) typhoon meteorological factors conceptual model Hainan |
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| 中文摘要 |
| 为了探讨2016号台风"浪卡"对海南岛臭氧（O3）浓度的影响，选取了2020年10月10~14日海南岛逐时空气质量监测数据、气象要素数据、ERA5再分析资料和"葵花8号"红外亮温TBB产品，采用相关分析和后向轨迹模拟方法进行深入讨论.结果表明，10月11~13日台风过程期间均有市县O3最大8 h滑动浓度平均值［ρ（O3-8h）］超标，海南岛平均ρ（O3-8h）峰值出现在10月12日，为130.15 μg ·m-3，共有4个市县O3-8h浓度超标，其中临高县达到了全岛最高值，为198.44 μg ·m-3.台风过程期间海南岛小时O3浓度与降水量、相对湿度和风速呈负相关关系，与气压和气温呈正相关关系，其中与降水量、气压和相对湿度的相关系数通过了99.9%的信度检验.我国东南部沿海省份是海南岛此次O3污染的主要贡献源区.受西太平洋副热带高压（副高）内部的下沉气流和台风"浪卡"外围下沉气流共同影响，源区大气存在垂直混合作用，气象条件有利于大气光化学反应，并随着台风西北侧的东北气流输送至海南岛，致使海南岛O3污染事件发生.还构建了台风"浪卡"影响下的海南岛O3污染的天气概念模型，可供大气污染预测预警研究和环境管理部门污染联防联控参考. |
| 英文摘要 |
| In order to explore the influence of the 2016 typhoon Nangka on ozone (O3) concentration in Hainan Island, this study employed correlation analysis and backward trajectory simulated methods, using the hourly air quality monitoring data, meteorological data, EAR5 reanalysis data, and bright temperature (TBB) infrared from the Himawari-8 satellite from October 10 to 14, 2020. The results showed that, during the typhoon process from October 11 to 13, the O3-8h (maximum of 8 hours sliding average) concentration exceeded the standard. The averaged ρ(O3-8h) of Hainan Island reached its peak value (130.5 μg·m-3) in October 12, 2020, with the O3-8h concentration exceeding the standard in four cities and counties, in which Lingao County reached the highest concentration of 198.44 μg·m-3. During the typhoon process, the hourly O3 concentration was negatively correlated with precipitation, relative humidity, and wind speed and positively correlated with air pressure and air temperature. Moreover, the correlation coefficients between O3 with precipitation, air pressure, and relative humidity exceeded the 99.9% confidence level. The southeastern coastal provinces of China were the main contribution source area for this ozone pollution process on Hainan Island. Affected by the downdraft inside the western Pacific subtropical high (WPSH) and the downdraft outside the circumference of typhoon Nangka, vertical transport in the atmosphere appeared over the contribution source area. The meteorological conditions were favorable for atmospheric photochemical reactions. Air pollutants were transported to Hainan Island along the northeast airflow around the typhoon, resulting in the occurrence of an O3 pollution event. In addition, this study built a weather conceptual model of O3 pollution in Hainan Island affected by typhoon Nangka, which can be used as a reference for the joint pollution prevention and control by air pollution prediction, early warning, and environmental management departments. |
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