区域传输对山东半岛大气粗颗粒物污染的影响——基于轨迹模型的定量测度
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童菲(2001—),女,安徽池州人,硕士研究生,主要从事环境地理学研究。E-mail: tfei@ahnu.edu.cn |
收稿日期: 2024-07-10
修回日期: 2024-12-22
网络出版日期: 2025-06-24
基金资助
安徽省高校自然科学重点项目(2022AH050181)
国家自然科学基金项目(41977402)
国家级大学生创新创业项目(202310370043)
版权
Impact of regional transport on coarse particulate matter in the Shandong Peninsula: Quantitative measurements based on trajectory modeling
Received date: 2024-07-10
Revised date: 2024-12-22
Online published: 2025-06-24
Supported by
Key Projects of Natural Science in Universities of Anhui Province(2022AH050181)
National Natural Science Foundation of China(41977402)
National College Students’ Innovation and Entrepreneurship Training Program(202310370043)
Copyright
精准评估区域传输对大气粗颗粒物(PM2.5~10)质量浓度的影响对于联防联控至关重要。本研究以山东半岛为研究案例地,基于2015—2022年逐时质量浓度监测数据,采用后向轨迹和浓度权重轨迹模型(Concentration Weighted Trajectory, CWT)定量测度区域传输对大气PM2.5~10污染影响的变化趋势和空间差异。结果表明,①2015—2022年山东半岛大气PM2.5~10年均质量浓度由(58.06±15.36) μg/m3显著下降至(33.27±6.96) μg/m3(Z<0, P<0.001),但PM2.5~10质量浓度占PM10质量浓度的比例由43.17%增长至46.27%,重污染时期集中分布在3—4月。②空间上,山东半岛大气PM2.5~10质量浓度整体呈西部内陆向东部沿海递减的空间变化趋势,德州、济南、聊城等地污染程度高。③山东半岛春季、秋季和冬季的气流轨迹主要受西北境外远距离传输的影响,而夏季主要以近距离传输为主。西北远距离输送气团的占比逐渐增大,而东南海洋大气输送气团的占比逐渐减少。④CWT分析显示,潜在源区如内蒙古、河北、河南等地对山东半岛大气PM2.5~10输送的质量浓度由28.47 μg/m3降低至9.00 μg/m3,开封、衡水、濮阳等地输送的质量浓度降低较多,而长沙、湘潭、天门等地需要加强管制。研究结果定量评估了区域传输对山东半岛大气PM2.5~10污染的贡献,为未来大气PM2.5~10污染联防联控提供决策参考。
关键词: 大气粗颗粒物(PM2.5~10); 区域传输; 定量测度; 山东半岛
童菲 , 方凤满 , 马康 , 李静文 , 林跃胜 , 方正 . 区域传输对山东半岛大气粗颗粒物污染的影响——基于轨迹模型的定量测度[J]. 地理科学, 2025 , 45(6) : 1381 -1391 . DOI: 10.13249/j.cnki.sgs.20240869
Accurate assessment the impact of regional transport on atmospheric concentrations of coarse particulate matter (PM2.5-10) is essential for effective joint prevention and control measures. In this study, the Shandong Peninsula serves as the case study site. Utilizing hourly concentration monitoring data from 2015 to 2022, we employed backward trajectory assessments, and concentration-weighted trajectory (CWT) model to quantitatively evaluate trends and spatial variations in the impacts of regional transport on atmospheric PM2.5-10 pollution. The results indicate that: 1) The annual mean atmospheric PM2.5-10 concentration in the Shandong Peninsula significantly decreased from (58.06±15.36) μg/m3 in 2015 to (33.27±6.96) μg/m3 in 2022 (Z<0, P<0.001). However, the proportion of PM2.5-10 concentration relative to PM10 concentration increased from 43.17% to 46.27%, with the period of heavy pollution primarily occurring from March to April. 2) Spatially, the overall trend of atmospheric PM2.5-10 concentration in the Shandong Peninsula exhibited a decline from the western inland areas to the eastern coast, with Dezhou, Jinan, Liaocheng identified as highly polluted areas. 3) The airflow trajectories affecting the Shandong Peninsula in spring, autumn and winter are primarily influenced by long-range transport from the northwest, while summer is predominantly characterized by close-range transport. The proportion of air masses transported over long distances from the northwest is gradually increasing, while the proportion of air masses transported from the southeastern ocean is gradually decreasing. 4) CWT analysis reveals that the concentration of atmospheric PM2.5-10 transported from regions such as China’s Inner Mongolia, Hebei and Henan decreased from 28.47 μg/m3 to 9.00 μg/m3. Notably, the reductions are more pronounced for transport from Kaifeng, Hengshui, and Puyang, while regions such as Changsha, Xiangtan and Tianmen require enhanced control measures. This study quantitatively assesses the contribution of regional transport to atmospheric PM2.5-10 pollution in the Shandong Peninsula and provided a valuable reference for future joint prevention and control strategies strategies atmospheric PM2.5-10 pollution.
表1 2015—2022年山东半岛大气PM2.5~10质量浓度及占PM10的比例Table 1 PM2.5-10 concentration and changes in its proportion to PM10in Shandong Peninsula from 2015 to 2022 |
| 年份 | 站点数/个 | 最小值/(μg/m3) | 最大值/(μg/m3) | 平均值/(μg/m3) | 标准差/(μg/m3) | PM2.5~10占比/% |
| 2015 | 76 | 24.17 | 96.32 | 58.06 | 15.36 | 43.17 |
| 2016 | 72 | 22.95 | 83.92 | 54.22 | 14.52 | 45.22 |
| 2017 | 81 | 21.69 | 86.61 | 53.15 | 14.00 | 47.89 |
| 2018 | 77 | 23.92 | 78.74 | 50.56 | 11.26 | 50.41 |
| 2019 | 78 | 26.72 | 77.85 | 47.63 | 9.80 | 46.95 |
| 2020 | 82 | 20.40 | 55.72 | 37.96 | 8.63 | 44.11 |
| 2021 | 110 | 11.00 | 67.15 | 44.81 | 10.31 | 51.28 |
| 2022 | 106 | 16.87 | 49.49 | 33.27 | 6.96 | 46.27 |
表2 2015—2022年中国内陆主要潜在源区对山东半岛大气PM2.5~10质量浓度的贡献值/(μg/m3)Table 2 Contribution of major potential source areas in inland China on PM2.5~10 pollution in Shandong Peninsula from 2015 to 2022/(μg/m3) |
| 潜在源区 | 贡献值 | 潜在源区 | 贡献值 | |||
| 济南 | 开封市 | -68.10 | 青岛 | 衡水市 | -50.88 | |
| 濮阳市 | -55.12 | 濮阳市 | -50.13 | |||
| 邯郸市 | -55.00 | 邯郸市 | -37.93 | |||
| 衡水市 | -36.94 | 开封市 | -27.62 | |||
| 西安市 | 22.52 | 池州市 | 13.40 | |||
| 池州市 | 24.02 | 鄂州市 | 15.04 | |||
| 张家界市 | 28.28 | 商洛市 | 17.54 | |||
| 湘潭市 | 39.89 | 安庆市 | 18.66 | |||
| 长沙市 | 48.04 | 天门市 | 26.03 |
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