School of Public Health and Management, Chongqing Medical University, Chongqing, China.
Research Center for Medicine and Social Development, Chongqing Medical University, Chongqing, China.
Int J Environ Health Res. 2022 Dec;32(12):2695-2707. doi: 10.1080/09603123.2021.1987394. Epub 2021 Oct 13.
The study analyzed the current status and changing trends of PM pollution, and used Kriging spatial interpolation, spatial autocorrelation analysis, and scan statistics to explore the spatiotemporal characteristics and identify hotspots. The results showed that PM pollution during 2015-2019 displayed a downward trend year by year, with a pronounced seasonal difference of higher concentrations in winter and lower concentrations in summer. By 2019, there were still 110 cities (n = 194) failed to meet China's annual grade II air quality standard (35 μg/m). The spatial distribution of PM was characterized by marked heterogeneity, with a significant spatial dependence and clustering characteristics. The pollution hotspots of PM were mainly concentrated in eastern and central China, especially in the Beijing-Tianjin-Hebei region and its surrounding area. The results of this study will assist Chinese authorities in developing strategies for preventing and controlling air pollution, especially in hotspot regions and during peak periods.
本研究分析了 PM 污染的现状和变化趋势，利用克里金空间插值、空间自相关分析和扫描统计方法，探讨了时空特征和热点识别。结果表明，2015-2019 年 PM 污染呈逐年下降趋势，冬季浓度较高，夏季浓度较低，季节性差异明显。到 2019 年，仍有 110 个城市（n=194）未达到中国年二级空气质量标准（35μg/m）。PM 的空间分布特征具有明显的异质性，存在显著的空间依赖性和聚类特征。PM 的污染热点主要集中在中国东部和中部地区，特别是京津冀地区及其周边地区。本研究结果将有助于中国政府制定空气污染防治策略，特别是在热点地区和高峰期。
