Nonlinear impact and spatial spillover effect of new urbanization on PM2.5 from a multi-dimensional perspective

作者：He Liu, Yilu Gong, Songbo Li · 发表于：Ecological Indicators · 年份：2024 · DOI：10.1016/j.ecolind.2024.112360 · 被引用次数：12 · 研究领域：Air Quality and Health Impacts、Energy, Environment, Economic Growth、COVID-19 impact on air quality

• Influence of new urbanization on air quality is nonlinear and multi-dimensional. • High air pollution in urban agglomerations affects air quality of nearby cities. • Urban air pollution first increased then decreased, following Kuznets curve. • Spatiotemporal heterogeneity of PM 2.5 in China resulted from interacting factors. Under accelerating urbanization, urban air pollution has emerged as a critical research area. Fine particulate matter (PM 2.5 ) poses significant health risks, yet research exploring the nonlinear impact of multi-dimensional urbanization (M-URB) on PM 2.5 and its spatial spillover effect remains insufficient. Considering China’s emphasis on new urbanization and ecological civilization construction, both of which are defined by sustainable development attributes, research on the effects of urbanization on PM 2.5 becomes imperative. Therefore, we performed exploratory spatial data analysis (ESDA) and standard ellipse deviation (SED) analysis to investigate the dynamic spatiotemporal characteristics of PM 2.5 in 285 cities in China from 2006 to 2020. In addition, we employed a spatial econometric model to examine the nonlinear impact and spatial spillover effect of M-URB on PM 2.5 . Our analysis revealed that between 2006 and 2020, China experienced a fluctuating and declining trend in PM 2.5 levels, with a regional distribution characterized by east–west polarization. The PM 2.5 showed a pronounced clustering characteristic, with its centroid demonstrati...