Characteristics and Influencing Factors of PM Change in Tree Shrub-grass Community under High Traffic Density

摘要

The problem of PM pollution is becoming more and more serious which threatens human health. Road green space can improve air quality, affect the concentration and the change of PM. In order to reveal the effect of road green space on PM, the type of green space under the high traffic density in Lin'an District of Hangzhou was selected as the research object. The concentration of PM2.5, PM_(1.0), PM_(10), temperature, humidity, wind speed, air pressure and CO_2 concentration were continuously monitored and the relationship between them was studied. In this paper, the temporal and spatial variation of PM_(1.0), PM_(2.5) and PM_(10) was studied. The reduction coefficient of PM concentration at different distances was analyzed, and the correlation coefficient between PM concentration and the meteorological factors was calculated. The results of this study are instructive for PM research in urban green space.