Temporal and Spatial Exposure of Gaseous Pollutants and Its Influence Factors in Shandong Province

Abstract

According to the monitoring data of SO2, NO2 and PM10 in Shandong Province from 2005 to 2016, and Daniel Tendency Verification was used to analyze the trends and influencing factors of urban air quality. The results show that: (1) The comprehensive pollution index of Shandong Province showed downtrend during 2010 to 2016 which indicated the ambient air quality was improving. The changes in the main atmospheric pollutants are obvious: SO2 and PM10 show a significant downward trend, and NO2 is relatively stable. (2) In recent years, pollutants in Shandong Province have obvious temporal and spatial changes, and the highest concentration of SO2 has appeared in Zibo City. The area with high concentration of NO2 gradually shifted to the central Shandong Province, while the high concentration of PM10 shifted from south to west. The monthly variation of SO2, NO2 and PM10 had the same tendency. The high concentration appeared in November, December and January and the low concentration occurred from June to September. PM10 had a small peak in the non-heating period (March to April) which was influenced by dust weather. (3) Some artificial control measures such as optimization of industrial and energy structure and regulations of atmospheric pollution sources played important roles in improving air quality in Shandong province. Topography, geomorphology, climate and other natural factors were significant external factors which had effects on the spatial and temporal distribution of air pollutants.