Abstract

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Title:: Experimental Study on Effects of Vertical Greening on Air Temperature,Relative Humidity and PM2.5 Concentrations

Author(s):: YAN Shanshan; HONG Bo; QIN Hongqiao; (College of Landscape Architecture and Arts,Northwest A & F University,Yangling，Shaanxi 712100)

Keywords:: vertical greening; air temperature and relative humidity; PM2.5; field experiment

Abstract:: This study analyzed the effects of vertical greening on air temperature,relative humidity and PM2.5 concentrations at the height of 1.5 m and 6.5 m with field experiment,and a non-greening wall was selected to compare the variation of those factors.The results showed that,there was a negative linear relationship between temperature and PM2.5 concentration (R2=0.729 9),and a positive relationship between relative humidity and PM2.5 concentration (R2=0.696 1) for vertical greening；the mean temperature at the pedestrian level (1.5 m) was obvious lower than that at the 6.5 m height,and the average PM2.5 concentration before 14:00 was high for vertical greening,which was opposite to the non-greening wall；the temperature of vertical greening was 2-3 ℃ lower,and the average PM2.5 concentration was approximately 10% lower than non-greening wall.