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<p>This study investigated the spatiotemporal distribution characteristics and seasonal potential sources of atmospheric pollutants in Shiyan, a typical inland mountainous city in China. Data were collected from four national control monitoring stations in Shiyan City between March 2021 and February 2022. The HYSPLIT model, backward trajectory airflow analysis, and cluster analysis were conducted to identify the main pollution processes for each season and determine the sources and migration paths of atmospheric pollutants in Shiyan City. The results indicated that PM<sub>2.5</sub> (autumn and winter), PM<sub>10</sub> (spring), and O<sub>3</sub> (summer) were the characteristic pollutants, with the air quality showing seasonal variations. Compared with spring, summer and autumn presented better air quality, whereas winter presented the poorest air quality. The potential sources of spring PM<sub>10</sub> pollution were primarily located in Jinan, Liaocheng, and Heze in southwestern Shandong Province and Xuchang, Kaifeng, and Nanyang in Henan Province. The main potential sources of O<sub>3</sub> pollution during summer were identified in Chongqing, Ankang, Yichang, Jingmen, and Xiangyang. In autumn, the primary potential sources of PM<sub>2.5</sub> pollution were local areas within Shiyan and surrounding regions such as Jingzhou and Xiangyang. For winter, the main potential sources of PM<sub>2.5</sub> pollution were from areas such as Enshi, which is located around Shiyan, as well as Zhoukou and Shangqiu in Henan Province. This study provides theoretical support for enhancing air pollution control measures and managing compound air pollutant emissions across different seasons.</p>

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Investigation of the Spatiotemporal Variation Characteristics and Potential Source Regions of PM2.5, PM10, and O3 in Shiyan, China

  • 期刊论文

  • 发表日期：

    2025年4月12日

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  • Ying Zhang,
  • Shici Zhang,
  • Rui Zhang,
  • Hua Guo,
  • Jinjin Peng,
  • Yuqing Zhao,
  • Zhiyan Zhang,
  • Shuo Zhang,
  • Shan Liu

摘要

This study investigated the spatiotemporal distribution characteristics and seasonal potential sources of atmospheric pollutants in Shiyan, a typical inland mountainous city in China. Data were collected from four national control monitoring stations in Shiyan City between March 2021 and February 2022. The HYSPLIT model, backward trajectory airflow analysis, and cluster analysis were conducted to identify the main pollution processes for each season and determine the sources and migration paths of atmospheric pollutants in Shiyan City. The results indicated that PM2.5 (autumn and winter), PM10 (spring), and O3 (summer) were the characteristic pollutants, with the air quality showing seasonal variations. Compared with spring, summer and autumn presented better air quality, whereas winter presented the poorest air quality. The potential sources of spring PM10 pollution were primarily located in Jinan, Liaocheng, and Heze in southwestern Shandong Province and Xuchang, Kaifeng, and Nanyang in Henan Province. The main potential sources of O3 pollution during summer were identified in Chongqing, Ankang, Yichang, Jingmen, and Xiangyang. In autumn, the primary potential sources of PM2.5 pollution were local areas within Shiyan and surrounding regions such as Jingzhou and Xiangyang. For winter, the main potential sources of PM2.5 pollution were from areas such as Enshi, which is located around Shiyan, as well as Zhoukou and Shangqiu in Henan Province. This study provides theoretical support for enhancing air pollution control measures and managing compound air pollutant emissions across different seasons.