城市园林绿地消减大气PM_(2.5)浓度研究进展

Research Advances on Reduction of PM Concentration in Urban Green Space

园林绿地能有效消减城市空气中的PM_(2.5)浓度,缓解大气污染状况。文中结合现有研究,综合阐述园林绿地消减PM_(2.5)浓度的作用机理,探讨园林绿地消减PM_(2.5)浓度的日变化和年变化规律及其原因,分析园林绿地中植物种类、绿地结构、绿地面积和宽度对大气PM_(2.5)浓度的消减作用,总结温度、相对湿度、风速、车流量等环境因子以及不同污染条件对PM_(2.5)浓度分布和扩散的影响,提出了园林绿地消减PM_(2.5)浓度的研究趋势,指出应进一步探讨PM_(2.5)对植物生长的影响、城市园林绿地消减PM_(2.5)浓度的尺度效应、城市绿色空间滞尘功能评估以及PM_(2.5)的消减量与健康效益的关联性等。

Urban green space can effectively reduce the PM_(2.5) concentration in the air and effectively alleviate atmospheric pollution. Based on the existing research, this paper comprehensively elaborates the mechanism of PM_(2.5) concentration reduction in green space, discusses the diurnal and annual change law of PM_(2.5) concentration in green space and the reasons behind, analyzes the effect of plant types and the structure, area and width of green space on the reduction of atmospheric PM_(2.5) concentration, and summarizes the influence of environmental factors such as temperature, relative humidity, wind speed and vehicle flow as well as the different pollution conditions on PM_(2.5) concentration distribution and diffusion. The research trend of PM_(2.5) concentration reduction in green space is proposed. It is suggested that the effects of PM_(2.5) on plant growth,the scale effect of reducing PM_(2.5) concentration in urban garden green space, the evaluation of the dust retention function of urban green spaces and the correlation between PM_(2.5) reduction and health benefits should be further explored.