Abstract:Increasing studies have investigated the characteristics of fine particulate matter of less than 2.5 μm (PM 2.5 ) using ground-level observations among Chinese cities in recent years.This article analyzed the geographic aspects and ecological correlates of PM 2.5 based on insituambient airquality observations for367 cities and prefectures across China.Results of global and local Moran’sI analyse ssuggested a significant clustered pattern of PM 2.5 acrossthe country withhot spots mainly concentrated incitieslocated in the North China Plain. Spatially interpolated PM 2.5 estimates showed that most of China’s territories experienced unhealthy concentrations of PM 2.5 except during summer, while much larger proportions of China’s population was exposed to un healthy PM 2.5 all year round. Results from regression analyses suggested that the spatial variations of PM 2.5 were positively associated with air pollution but inversely related to meteorological factors. Findings from this research can provide new insights into air pollution mitigation policies and public health efforts in China and beyond.
Keywords: Spatialanalysis;Smog; PM 2.5; Spillovereffect;China
【source】Air Quality, Atmosphere & Health
