山东省PM2.5污染时空变化特征与影响因素分析OA

Spatial autocorrelation analysis and Mann-Kendall test were used to explore the temporal and spatial variation trend of PM2.5 pollution in Shandong Province,and Spearman correlation analysis was fur-ther used to analyze the influence of meteorological conditions and human activities on PM2.5 pollution.The results show as follows.(1)PM2.5 pollution showed a fluctuating upward trend from 2000 to 2013,and a decreasing trend after 2013;The characteristics of seasonal changes are significant,showing a feature of"high in winter,low in summer,spring and autumn in between the seasonal changes."(2)The PM2.5 pol-lution in Shandong Province demonstrated a significant spatial accumulation characteristic,and the PM2.5 pollution value of the province decreased from west to east.(3)The influencing factors vary in different months.PM2.5 pollution in spring is greatly affected by air temperature,and with the rise of air tempera-ture,PM2.5 pollution is reduced.Summer is affected by precipitation and temperature.PM2.5 pollution in au-tumn is affected by temperature relative humidity.In winter,PM2.5 pollution is greatly affected by the sun-shine hours,and has a negative correlation with the sunshine hours.(4)Green coverage,tertiary industry and GDP in built-up areas are negatively correlated with PM2.5 pollution,and PM2.5 pollution is positively correlated with population density and the proportion of secondary industry.