Scale Effects and Regional Disparities of Land Use in Influencing PM2.5 Concentrations: A Case Study in the Zhengzhou Metropolitan Area, China

Land use has been demonstrated to have an important influence on PM2.5 concentrations; however, how the scale effects and regional disparities in land concentrations remains unclear. This study investigated differences spatial variations concentrations, associations between use, explored of heterogeneity action concentrations. The main findings indicated greater intra-unit variation at small scales inter-unit large scales. had a positive association with surrounding cultivated artificial surface, negative forest grass; surface was stronger Cultivated negatively influenced generally. Artificial surfaces showed strong most urban areas. influencing largest (4698.05 m). provide new interpretation relationship may contribute effective policy making from perspective planning pollution control abatement.