| 华东地区对流层O3和前体物HCHO及NO2的时空特征 |
| 摘要点击 1524 全文点击 428 投稿时间：2022-10-13 修订日期：2022-11-29 |
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| 中文关键词 华东地区 臭氧(O3) 敏感性 HYSPLIT模型 潜在源贡献 |
| 英文关键词 East China ozone (O3) sensitivity HYSPLIT model potential source contribution |
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| 中文摘要 |
| 通过OMI遥感卫星数据分析华东地区2005~2021年大气对流层臭氧（O3）、二氧化氮（NO2）和甲醛（HCHO）柱浓度的时空特征，利用后向轨迹模型（HYSPLIT）探究其来源.结果表明：① 17年间，对流层O3柱浓度平稳增加，2010年上升到最大值，之后呈现一种波动起伏的状态；NO2在2005~2012年呈增加趋势，2012~2021年缓慢下降；HCHO柱浓度由2005年的1.15×1016 molec ·cm-2呈现增长趋势，上升到2021年的1.8×1016 molec ·cm-2.②在空间上，3种污染物柱浓度总体上呈现北高南低的空间格局，北部为高高聚集区域，中部为无特征区域，南部为低低聚集区域.③ O3的敏感性呈现为：春季η<2.3，属于VOCs控制区；夏季η<4.2，表现为大部分地区是NOx-VOCs协同控制区，少部分地区是VOCs控制区；秋季η<4.2，主要为VOCs控制，极少部分为NOx-VOCs协同控制区；冬季η<2.3，为VOCs控制区，山东省以VOCs控制为主.④因2005~2021年O3在山东省呈现为高高聚集，所以选取2021年山东省的省会城市济南市进行O3来源解析，2021年济南市的O3浓度增加有两个方面，一是通过远距离的气团输送主要来自于江苏省的连云港市和河北省的沧州市；二是近距离的气团输送来自于济南市附近城市的污染和黄海、渤海经济区，且聚集性分析与潜在源贡献因子算法（PSCF）和权重轨迹分析法（CWT）有相同的结果. |
| 英文摘要 |
| Based on OMI remote sensing satellite data, the temporal and spatial characteristics of tropospheric ozone (O3), nitrogen dioxide (NO2), and formaldehyde (HCHO) concentrations in East China from 2005 to 2021 were analyzed, and the backward trajectory (HYSPLIT) model was used to explore their sources. The results showed that ① during the 17 years, the tropospheric O3 concentration steadily increased, reached the maximum value in 2010, and then showed a fluctuating and undulating state. NO2 showed an increasing trend from 2005 to 2012 and slowly decreased from 2012 to 2021. The average HCHO concentration showed an increasing trend from 1.15×1016molec·cm-2 in 2005 to 1.8×1016 molec·cm-2 in 2021. ② In terms of spatial characteristics, the concentrations of the three pollutants generally showed a pattern of high concentration in the north and low concentration in the south, with a high concentration in the north, uncharacteristic concentration in the middle, and low concentration in the south. ③ The sensitivity of O3 was as follows:η<2.3 in spring, which belonged to the VOCs control area; η<4.2 in summer, showing that most areas were NOx-VOCs coordinated control areas and a few areas were VOCs control areas; η<4.2 in autumn, which was primarily controlled by VOCs, with a few of them being NOx-VOC synergistic control areas; and η<2.3 in winter, which was a VOCs-controlled area. VOCs were primarily controlled in Shandong Province. ④ Owing to the high concentration of O3 in Shandong Province from 2005 to 2021, Jinan, the capital city of Shandong Province in 2021, was selected for ozone source analysis. The O3 concentration increased in Jinan in 2021 owing to two aspects. First, the long-distance air transportation primarily originated from Lianyungang City in Jiangsu Province and Cangzhou City in Hebei Province. Second, the close air mass transport originated from the pollution of cities near Jinan and the economic zones of the Yellow Sea and Bohai Sea, and the aggregation analysis results corresponded with those of the potential source contribution factor algorithm (PSCF) and the weighted trajectory analysis (CWT). |
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