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- W2783010454 abstract "Fine particulate matter (PM2.5) pollution has been a major issue in many countries. Considerable studies have demonstrated that PM2.5 pollution is a regional issue, but little research has been done to investigate the regional extent of PM2.5 pollution or to define areas in which PM2.5 pollutants interact. To allow for a better understanding of the regional nature and spatial patterns of PM2.5 pollution, This study proposes a novel framework for delineating regional boundaries of PM2.5 pollution. The framework consists of four steps, including cross-correlation analysis, time-series clustering, generation of Voronoi polygons, and polygon smoothing using polynomial approximation with exponential kernel method. Using the framework, the regional PM2.5 boundaries for China are produced and the boundaries define areas where the monthly PM2.5 time series of any two cities show, on average, more than 50% similarity with each other. These areas demonstrate straightforwardly that PM2.5 pollution is not limited to a single city or a single province. We also found that the PM2.5 areas in China tend to be larger in cold months, but more fragmented in warm months, suggesting that, in cold months, the interactions between PM2.5 concentrations in adjacent cities are stronger than in warmer months. The proposed framework provides a tool to delineate PM2.5 boundaries and identify areas where PM2.5 pollutants interact. It can help define air pollution management zones and assess impacts related to PM2.5 pollution. It can also be used in analyses of other air pollutants." @default.
- W2783010454 created "2018-01-26" @default.
- W2783010454 creator A5003987926 @default.
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- W2783010454 date "2018-04-01" @default.
- W2783010454 modified "2023-10-10" @default.
- W2783010454 title "A framework for delineating the regional boundaries of PM2.5 pollution: A case study of China" @default.
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- W2783010454 doi "https://doi.org/10.1016/j.envpol.2017.12.064" @default.
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