Abstract:Increasing studies have investigated the characteristics of fine particulate matter of less than 2.5 μm (PM 2.5 ) using ground-level
observationsamongChinesecitiesinrecentyears.ThisarticleanalyzedthegeographicaspectsandecologicalcorrelatesofPM 2.5
basedoninsituambientairqualityobservationsfor367citiesandprefecturesacrossChina.ResultsofglobalandlocalMoran’sI
analysessuggested a significant clustered pattern ofPM 2.5 acrossthe country withhot spots mainlyconcentrated 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 unhealthy
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
